Re: Debian seems unable to drive my (4) monitors

[Mauro Condarelli]

Il 26/11/2015 02:07, Felix Miata ha scritto:

Ric Moore composed on 2015-11-25 19:31 (UTC-0500):


as the only other way to
achieve what you want is xrandr. I tried to use/configure it once and
got a headache for my trouble.

If Mauro wants to try xrandr as a workaround until the root problem can be
found, and isn't familiar with xrandr methodology,

Unfortunately problem is deeper than that.
xrandr does not "see" at all the non-working monitors, so it's useless in this 
case.
Debian, on my system, really seems unable to drive two video cards at the same 
time.
Thanks anyway.
Mauro

http://fm.no-ip.com/Share/setup may prove instructive. Here it lives and
works as /etc/X11/xinit/xinitrc.d/setup in openSUSE and Fedora. In
Debian/Mint/*buntu I have it also, but to make it work requires symlinking it
into /etc/X11/Xsession.d/, where I call it 95 setup on e.g. Wheezy.

What it contains is every xrandr setup I've ever needed that worked as
expected, all commented out except for whichever one line is needed. 4
displays at once I've yet to try, as all my Intel motherboards as yet have
provided no support for simultaneous use of PEG and IGP connections, and I've
never had inducement to try 2 PCIe cards at once or more than 2 displays at 
once.

Re: Debian seems unable to drive my (4) monitors

[Lisi Reisz]

On Wednesday 25 November 2015 21:12:03 Mauro Condarelli wrote:
> Il 25/11/2015 21:28, Lisi Reisz ha scritto:
> > On Wednesday 25 November 2015 20:14:04 Mauro Condarelli wrote:
> >> Pretty Please,
> >> tell me this isn't true:
> >> The only sensible answer I got from debian list boils down to: "use
> >> proprietary driver".
> >>
> >> This is truly sad, especially since I *know* Linux Mint (which is a
> >> debian derivative, through ubuntu parentage) does indeed work
> >> out-of-the-box with *no* configuration at all.
> >
> > Presumably with a proprietary driver.  Mint makes no claims to be
> > entirely Free.
>
> You should (!) not presume too much.
> I am not used to speak without checking.
> Linux Mint uses nouveau for NVidia.

Then why can't you use the same version of nouveau in Debian?

> If You would have bothered checking lsmod I sent a few days ago you would
> have known.
>
> Regards
> Mauro
>
> > Lisi
> >
> >> A desolate
> >> Mauro
> >>
> >> Il 23/11/2015 14:40, Ric Moore ha scritto:
> >>> On 11/22/2015 10:44 AM, Mauro Condarelli wrote:
>  Thanks Ric,
>  care to share details on how You managed such a marvel?
>  How did You disable the internal (intel) "video card" (actually inside
>  the CPU chip)? From BIOS?
>  What other configuration did You do?
> >>>
> >>> I just disabled the video feature in the bios. Then I loaded the nvidia
> >>> driver. Then I used nvidia-settings to use xinerama and to configure
> >>> the order of the monitors. When you "save to X configuration file",
> >>> save it in your home directory as you are "user" and not able to save
> >>> directly to /etc/X11. Open a terminal and "sudo cp xorg.conf /etc/X11"
> >>> to put it there. If you have monitors of differing size, the X Server
> >>> Display Configuration will allow you to play tricks, like panning to a
> >>> smaller screen to be bigger through scrolling. Slick! Ric

Re: Debian seems unable to drive my (4) monitors

[Mauro Condarelli]

Il 25/11/2015 23:07, Catalin Soare ha scritto:



On Nov 25, 2015 11:54 PM, "Mauro Condarelli" > wrote:
>
>
> Il 25/11/2015 22:23, Catalin Soare ha scritto:
>>
>> Hello there,
>>
>> Maybe it is as you said earlier, an option in the kernel. Namely, the no 
multicard support you mentioned earlier, is it possible that was comming from the 
kernel itself or was it noveau?
>>
> Thanks Catalin.
>
> Context of said error is:
> ...
> [ 7.708] (II) Loading sub module "fbdevhw"
> [ 7.708] (II) LoadModule: "fbdevhw"
> [ 7.708] (II) Loading /usr/lib/xorg/modules/libfbdevhw.so
> [ 7.709] (II) Module fbdevhw: vendor="X.Org Foundation"
> [ 7.709] compiled for 1.17.2, module version = 0.0.2
> [ 7.709] ABI class: X.Org Video Driver, version 19.0
> [ 7.709] (WW) Falling back to old probe method for vesa
> [ 7.709] (WW) VGA arbiter: cannot open kernel arbiter, no multi-card 
support
> [ 7.709] (II) Loading sub module "dri2"
> [ 7.709] (II) LoadModule: "dri2"
> [ 7.709] (II) Module "dri2" already built-in
> [ 7.709] (--) NOUVEAU(0): Chipset: "NVIDIA NVE4"
> [ 7.709] (II) NOUVEAU(0): Creating default Display subsection in Screen 
section
> "Default Screen Section" for depth/fbbpp 24/32
> [ 7.709] (==) NOUVEAU(0): Depth 24, (--) framebuffer bpp 32
> [ 7.709] (==) NOUVEAU(0): RGB weight 888
> ...
>
> I do not know where it comes from (if You want I can post or pastebin the 
whole log again).
> I tried googling, but never found an explanation, only cited in threads 
"solved" by other means.
> VGAarbiter is a kernel module but AFAIK it deals with "legacy VGA devices" which do not 
"allow relocation of such (I/O or memory space) ranges"; it is unclear to me if this applies 
to my case.
>
> I am willing to experiment, but I need help because I have no experience with 
video drivers.
>
> Regards
> Mauro

No need to upload again, I admit I didn't bother to check since apparently 
others have already and I don't have experience with Linux drivers.

Personally, what I would do in this case is save the dmesg for debian 
somewhere; go back to Mint and check dmesg over there too. Also check if Mint 
has blacklisted any modules, such as, for example fbdevhw? Either way, there 
should be something that you will find by matching the 2 OSs.


Thanks.
willdo.
Mauro

Re: Debian seems unable to drive my (4) monitors

[Mauro Condarelli]

Il 25/11/2015 22:35, Ric Moore ha scritto:

On 11/25/2015 03:14 PM, Mauro Condarelli wrote:

Pretty Please,
tell me this isn't true:
The only sensible answer I got from debian list boils down to: "use
proprietary driver".

This is truly sad, especially since I *know* Linux Mint (which is a
debian derivative, through ubuntu parentage) does indeed work
out-of-the-box with *no* configuration at all.


If this is the same box, you can mount the mint drive/partition and look for an 
/etc/X11/xorg.conf file to copy to your Debian install~or~ follow these steps:
http://www.instructables.com/id/How-to-set-up-multiple-monitors-in-linux/?ALLSTEPS

Site is up again.
That is one of the sites I checked before.
Instructions given there do not work for me.
After trying them I doubt they work for anyone nowadays; they're over eight 
years old and a lot changed in Linux/X world since.
What was sound advice is now retrocomputing.
The exercise of deleting misleading old info isn't practiced often, 
unfortunately.



The HUGE reason I recommend the nvidia driver is that you will get much better 
performance IF you want to play openGL games and less tearing as you move windows 
from monitor to monitor. Yeah, I am a selfish shameless pig.   Ric

Also this info isn't very state-of-the-Art.

Regards
Mauro

Re: Debian seems unable to drive my (4) monitors

[Mauro Condarelli]

Il 25/11/2015 22:35, Ric Moore ha scritto:

On 11/25/2015 03:14 PM, Mauro Condarelli wrote:

Pretty Please,
tell me this isn't true:
The only sensible answer I got from debian list boils down to: "use
proprietary driver".

This is truly sad, especially since I *know* Linux Mint (which is a
debian derivative, through ubuntu parentage) does indeed work
out-of-the-box with *no* configuration at all.


If this is the same box, you can mount the mint drive/partition and look for an /etc/X11/xorg.conf file to copy to your Debian install~or~ follow these 

As said multiple times:
Linux Mint works *WITHOUT* any configuration.
*NO* /etc/X11/xorg.conf (no, neither xorg.conf.d is present) I can copy.
That's why I suspect difference lies in compilation switches in either X server 
or kernel itself.


steps:
http://www.instructables.com/id/How-to-set-up-multiple-monitors-in-linux/?ALLSTEPS

Unfortunately the site seems down :(



The HUGE reason I recommend the nvidia driver is that you will get much better 
performance IF you want to play openGL games and less tearing as you move windows 
from monitor to monitor. Yeah, I am a selfish shameless pig.   Ric

I tried that, but it doesn't work either, or, at least, I was not able to make 
it work, despite I tried several configurations (and also no configuration).

Regards
Mauro

Re: Debian seems unable to drive my (4) monitors

[Mauro Condarelli]

Il 25/11/2015 23:56, Lisi Reisz ha scritto:

On Wednesday 25 November 2015 21:12:03 Mauro Condarelli wrote:

Il 25/11/2015 21:28, Lisi Reisz ha scritto:

On Wednesday 25 November 2015 20:14:04 Mauro Condarelli wrote:

Pretty Please,
tell me this isn't true:
The only sensible answer I got from debian list boils down to: "use
proprietary driver".

This is truly sad, especially since I *know* Linux Mint (which is a
debian derivative, through ubuntu parentage) does indeed work
out-of-the-box with *no* configuration at all.

Presumably with a proprietary driver.  Mint makes no claims to be
entirely Free.

You should (!) not presume too much.
I am not used to speak without checking.
Linux Mint uses nouveau for NVidia.

Then why can't you use the same version of nouveau in Debian?

Sometimes I ask myself if I really am an idiot unable to understand what people 
says.
I fail to understand what You are really asking.
I, very obviously, *am* using the same version of nouveau.
Unfortunately drivers do not live in a vacuum and thus *that* nouveau behaves 
differently in the two ecosystems.
I have been unable (to date) to pinpoint significant difference between the two 
systems.
Do You really think I would be here begging for help if I knew what was 
different?
What I am asking is exactly some help to diagnose this debian fault.

Regards
Mauro



If You would have bothered checking lsmod I sent a few days ago you would
have known.

Regards
Mauro


Lisi


A desolate
Mauro

Il 23/11/2015 14:40, Ric Moore ha scritto:

On 11/22/2015 10:44 AM, Mauro Condarelli wrote:

Thanks Ric,
care to share details on how You managed such a marvel?
How did You disable the internal (intel) "video card" (actually inside
the CPU chip)? From BIOS?
What other configuration did You do?

I just disabled the video feature in the bios. Then I loaded the nvidia
driver. Then I used nvidia-settings to use xinerama and to configure
the order of the monitors. When you "save to X configuration file",
save it in your home directory as you are "user" and not able to save
directly to /etc/X11. Open a terminal and "sudo cp xorg.conf /etc/X11"
to put it there. If you have monitors of differing size, the X Server
Display Configuration will allow you to play tricks, like panning to a
smaller screen to be bigger through scrolling. Slick! Ric

Re: Debian seems unable to drive my (4) monitors

[Ric Moore]

On 11/25/2015 05:36 PM, Mauro Condarelli wrote:



Il 25/11/2015 22:35, Ric Moore ha scritto:



The HUGE reason I recommend the nvidia driver is that you will get
much better performance IF you want to play openGL games and less
tearing as you move windows from monitor to monitor. Yeah, I am a
selfish shameless pig.   Ric

I tried that, but it doesn't work either, or, at least, I was not able
to make it work, despite I tried several configurations (and also no
configuration).


Ah! That's why I suggested a second nvidia card, of the same model as 
your original one, IF you have a second PCIe video slot and disable the 
onboard video. My setup works flawlessly, with all the accelerated bells 
and whistles you paid for. Jus' my two cents, as the only other way to 
achieve what you want is xrandr. I tried to use/configure it once and 
got a headache for my trouble. So, non-free pig/slut that I am, I use 
the simple nvidia driver setup util with two identical nvidia cards. 4 
gigs of video ram is nice. :) Ric.




--
My father, Victor Moore (Vic) used to say:
"There are two Great Sins in the world...
..the Sin of Ignorance, and the Sin of Stupidity.
Only the former may be overcome." R.I.P. Dad.
http://linuxcounter.net/user/44256.html

Re: Debian seems unable to drive my (4) monitors

[Felix Miata]

Ric Moore composed on 2015-11-25 19:31 (UTC-0500):

> as the only other way to 
> achieve what you want is xrandr. I tried to use/configure it once and 
> got a headache for my trouble.

If Mauro wants to try xrandr as a workaround until the root problem can be
found, and isn't familiar with xrandr methodology,
http://fm.no-ip.com/Share/setup may prove instructive. Here it lives and
works as /etc/X11/xinit/xinitrc.d/setup in openSUSE and Fedora. In
Debian/Mint/*buntu I have it also, but to make it work requires symlinking it
into /etc/X11/Xsession.d/, where I call it 95 setup on e.g. Wheezy.

What it contains is every xrandr setup I've ever needed that worked as
expected, all commented out except for whichever one line is needed. 4
displays at once I've yet to try, as all my Intel motherboards as yet have
provided no support for simultaneous use of PEG and IGP connections, and I've
never had inducement to try 2 PCIe cards at once or more than 2 displays at 
once.
-- 
"The wise are known for their understanding, and pleasant
words are persuasive." Proverbs 16:21 (New Living Translation)

 Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!

Felix Miata  ***  http://fm.no-ip.com/

Re: Debian seems unable to drive my (4) monitors

[Lisi Reisz]

On Wednesday 25 November 2015 20:14:04 Mauro Condarelli wrote:
> Pretty Please,
> tell me this isn't true:
> The only sensible answer I got from debian list boils down to: "use
> proprietary driver".
>
> This is truly sad, especially since I *know* Linux Mint (which is a debian
> derivative, through ubuntu parentage) does indeed work out-of-the-box with
> *no* configuration at all.

Presumably with a proprietary driver.  Mint makes no claims to be entirely 
Free.

Lisi
>
> A desolate
> Mauro
>
> Il 23/11/2015 14:40, Ric Moore ha scritto:
> > On 11/22/2015 10:44 AM, Mauro Condarelli wrote:
> >> Thanks Ric,
> >> care to share details on how You managed such a marvel?
> >> How did You disable the internal (intel) "video card" (actually inside
> >> the CPU chip)? From BIOS?
> >> What other configuration did You do?
> >
> > I just disabled the video feature in the bios. Then I loaded the nvidia
> > driver. Then I used nvidia-settings to use xinerama and to configure the
> > order of the monitors. When you "save to X configuration file", save it
> > in your home directory as you are "user" and not able to save directly to
> > /etc/X11. Open a terminal and "sudo cp xorg.conf /etc/X11" to put it
> > there. If you have monitors of differing size, the X Server Display
> > Configuration will allow you to play tricks, like panning to a smaller
> > screen to be bigger through scrolling. Slick! Ric

Re: Debian seems unable to drive my (4) monitors

[Catalin Soare]

On Nov 25, 2015 11:12 PM, "Mauro Condarelli"  wrote:
>
>
>
> Il 25/11/2015 21:28, Lisi Reisz ha scritto:
>>
>> On Wednesday 25 November 2015 20:14:04 Mauro Condarelli wrote:
>>>
>>> Pretty Please,
>>> tell me this isn't true:
>>> The only sensible answer I got from debian list boils down to: "use
>>> proprietary driver".
>>>
>>> This is truly sad, especially since I *know* Linux Mint (which is a
debian
>>> derivative, through ubuntu parentage) does indeed work out-of-the-box
with
>>> *no* configuration at all.
>>
>> Presumably with a proprietary driver.  Mint makes no claims to be
entirely
>> Free.
>
> You should (!) not presume too much.
> I am not used to speak without checking.
> Linux Mint uses nouveau for NVidia.
> If You would have bothered checking lsmod I sent a few days ago you would
have known.
>
> Regards
> Mauro
>
>
>>
>> Lisi
>>>
>>> A desolate
>>> Mauro
>>>
>>> Il 23/11/2015 14:40, Ric Moore ha scritto:

 On 11/22/2015 10:44 AM, Mauro Condarelli wrote:
>
> Thanks Ric,
> care to share details on how You managed such a marvel?
> How did You disable the internal (intel) "video card" (actually inside
> the CPU chip)? From BIOS?
> What other configuration did You do?

 I just disabled the video feature in the bios. Then I loaded the nvidia
 driver. Then I used nvidia-settings to use xinerama and to configure
the
 order of the monitors. When you "save to X configuration file", save it
 in your home directory as you are "user" and not able to save directly
to
 /etc/X11. Open a terminal and "sudo cp xorg.conf /etc/X11" to put it
 there. If you have monitors of differing size, the X Server Display
 Configuration will allow you to play tricks, like panning to a smaller
 screen to be bigger through scrolling. Slick! Ric
>
>

Hello there,

Maybe it is as you said earlier, an option in the kernel. Namely, the no
multicard support you mentioned earlier, is it possible that was comming
from the kernel itself or was it noveau?

Re: Debian seems unable to drive my (4) monitors

[Ric Moore]

On 11/25/2015 03:14 PM, Mauro Condarelli wrote:

Pretty Please,
tell me this isn't true:
The only sensible answer I got from debian list boils down to: "use
proprietary driver".

This is truly sad, especially since I *know* Linux Mint (which is a
debian derivative, through ubuntu parentage) does indeed work
out-of-the-box with *no* configuration at all.


If this is the same box, you can mount the mint drive/partition and look 
for an /etc/X11/xorg.conf file to copy to your Debian install~or~ follow 
these steps:

http://www.instructables.com/id/How-to-set-up-multiple-monitors-in-linux/?ALLSTEPS

The HUGE reason I recommend the nvidia driver is that you will get much 
better performance IF you want to play openGL games and less tearing as 
you move windows from monitor to monitor. Yeah, I am a selfish shameless 
pig.   Ric


--
My father, Victor Moore (Vic) used to say:
"There are two Great Sins in the world...
..the Sin of Ignorance, and the Sin of Stupidity.
Only the former may be overcome." R.I.P. Dad.
http://linuxcounter.net/user/44256.html

Re: Debian seems unable to drive my (4) monitors

[Catalin Soare]

On Nov 25, 2015 11:54 PM, "Mauro Condarelli"  wrote:
>
>
> Il 25/11/2015 22:23, Catalin Soare ha scritto:
>>
>> Hello there,
>>
>> Maybe it is as you said earlier, an option in the kernel. Namely, the no
multicard support you mentioned earlier, is it possible that was comming
from the kernel itself or was it noveau?
>>
> Thanks Catalin.
>
> Context of said error is:
> ...
> [ 7.708] (II) Loading sub module "fbdevhw"
> [ 7.708] (II) LoadModule: "fbdevhw"
> [ 7.708] (II) Loading /usr/lib/xorg/modules/libfbdevhw.so
> [ 7.709] (II) Module fbdevhw: vendor="X.Org Foundation"
> [ 7.709] compiled for 1.17.2, module version = 0.0.2
> [ 7.709] ABI class: X.Org Video Driver, version 19.0
> [ 7.709] (WW) Falling back to old probe method for vesa
> [ 7.709] (WW) VGA arbiter: cannot open kernel arbiter, no multi-card
support
> [ 7.709] (II) Loading sub module "dri2"
> [ 7.709] (II) LoadModule: "dri2"
> [ 7.709] (II) Module "dri2" already built-in
> [ 7.709] (--) NOUVEAU(0): Chipset: "NVIDIA NVE4"
> [ 7.709] (II) NOUVEAU(0): Creating default Display subsection in
Screen section
> "Default Screen Section" for depth/fbbpp 24/32
> [ 7.709] (==) NOUVEAU(0): Depth 24, (--) framebuffer bpp 32
> [ 7.709] (==) NOUVEAU(0): RGB weight 888
> ...
>
> I do not know where it comes from (if You want I can post or pastebin the
whole log again).
> I tried googling, but never found an explanation, only cited in threads
"solved" by other means.
> VGAarbiter is a kernel module but AFAIK it deals with "legacy VGA
devices" which do not "allow relocation of such (I/O or memory space)
ranges"; it is unclear to me if this applies to my case.
>
> I am willing to experiment, but I need help because I have no experience
with video drivers.
>
> Regards
> Mauro

No need to upload again, I admit I didn't bother to check since apparently
others have already and I don't have experience with Linux drivers.

Personally, what I would do in this case is save the dmesg for debian
somewhere; go back to Mint and check dmesg over there too. Also check if
Mint has blacklisted any modules, such as, for example fbdevhw? Either way,
there should be something that you will find by matching the 2 OSs.

Re: Debian seems unable to drive my (4) monitors

[Mauro Condarelli]

Pretty Please,
tell me this isn't true:
The only sensible answer I got from debian list boils down to: "use proprietary 
driver".

This is truly sad, especially since I *know* Linux Mint (which is a debian 
derivative, through ubuntu parentage) does indeed work out-of-the-box with *no* 
configuration at all.

A desolate
Mauro

Il 23/11/2015 14:40, Ric Moore ha scritto:

On 11/22/2015 10:44 AM, Mauro Condarelli wrote:

Thanks Ric,
care to share details on how You managed such a marvel?
How did You disable the internal (intel) "video card" (actually inside
the CPU chip)? From BIOS?
What other configuration did You do?


I just disabled the video feature in the bios. Then I loaded the nvidia driver. Then I used nvidia-settings 
to use xinerama and to configure the order of the monitors. When you "save to X configuration 
file", save it in your home directory as you are "user" and not able to save directly to 
/etc/X11. Open a terminal and "sudo cp xorg.conf /etc/X11"
to put it there. If you have monitors of differing size, the X Server Display 
Configuration will allow you to play tricks, like panning to a smaller screen 
to be bigger through scrolling. Slick! Ric

Re: Debian seems unable to drive my (4) monitors

[Mauro Condarelli]

Il 25/11/2015 21:28, Lisi Reisz ha scritto:

On Wednesday 25 November 2015 20:14:04 Mauro Condarelli wrote:

Pretty Please,
tell me this isn't true:
The only sensible answer I got from debian list boils down to: "use
proprietary driver".

This is truly sad, especially since I *know* Linux Mint (which is a debian
derivative, through ubuntu parentage) does indeed work out-of-the-box with
*no* configuration at all.

Presumably with a proprietary driver.  Mint makes no claims to be entirely
Free.

You should (!) not presume too much.
I am not used to speak without checking.
Linux Mint uses nouveau for NVidia.
If You would have bothered checking lsmod I sent a few days ago you would have 
known.

Regards
Mauro



Lisi

A desolate
Mauro

Il 23/11/2015 14:40, Ric Moore ha scritto:

On 11/22/2015 10:44 AM, Mauro Condarelli wrote:

Thanks Ric,
care to share details on how You managed such a marvel?
How did You disable the internal (intel) "video card" (actually inside
the CPU chip)? From BIOS?
What other configuration did You do?

I just disabled the video feature in the bios. Then I loaded the nvidia
driver. Then I used nvidia-settings to use xinerama and to configure the
order of the monitors. When you "save to X configuration file", save it
in your home directory as you are "user" and not able to save directly to
/etc/X11. Open a terminal and "sudo cp xorg.conf /etc/X11" to put it
there. If you have monitors of differing size, the X Server Display
Configuration will allow you to play tricks, like panning to a smaller
screen to be bigger through scrolling. Slick! Ric

Re: Debian seems unable to drive my (4) monitors

[Mauro Condarelli]

Il 25/11/2015 22:23, Catalin Soare ha scritto:

Hello there,

Maybe it is as you said earlier, an option in the kernel. Namely, the no 
multicard support you mentioned earlier, is it possible that was comming from 
the kernel itself or was it noveau?


Thanks Catalin.

Context of said error is:
...
[ 7.708] (II) Loading sub module "fbdevhw"
[ 7.708] (II) LoadModule: "fbdevhw"
[ 7.708] (II) Loading /usr/lib/xorg/modules/libfbdevhw.so
[ 7.709] (II) Module fbdevhw: vendor="X.Org Foundation"
[ 7.709] compiled for 1.17.2, module version = 0.0.2
[ 7.709] ABI class: X.Org Video Driver, version 19.0
[ 7.709] (WW) Falling back to old probe method for vesa
[ 7.709] (WW) VGA arbiter: cannot open kernel arbiter, no multi-card support
[ 7.709] (II) Loading sub module "dri2"
[ 7.709] (II) LoadModule: "dri2"
[ 7.709] (II) Module "dri2" already built-in
[ 7.709] (--) NOUVEAU(0): Chipset: "NVIDIA NVE4"
[ 7.709] (II) NOUVEAU(0): Creating default Display subsection in Screen 
section
"Default Screen Section" for depth/fbbpp 24/32
[ 7.709] (==) NOUVEAU(0): Depth 24, (--) framebuffer bpp 32
[ 7.709] (==) NOUVEAU(0): RGB weight 888
...

I do not know where it comes from (if You want I can post or pastebin the whole 
log again).
I tried googling, but never found an explanation, only cited in threads 
"solved" by other means.
VGAarbiter is a kernel module but AFAIK it deals with "legacy VGA devices" which do not 
"allow relocation of such (I/O or memory space) ranges"; it is unclear to me if this 
applies to my case.

I am willing to experiment, but I need help because I have no experience with 
video drivers.

Regards
Mauro

Re: Debian seems unable to drive my (4) monitors

[John L. Ries]

It looks like an X issue rather than a kernel issue, but I could easily be 
mistaken.  You might want to check the system logs (/var/log/messages or 
journalctl depending on whether you're using SysVInit or SystemD) for 
kernel error messages.  I had a problem last week on my OpenSUSE box: X 
refused to restart and the system pretty much went catatonic as soon as I 
logged out.  It turned out to be a bad video driver (downgrading the 
kernel fixed it).


--|
John L. Ries  |
Salford Systems   |
Phone: (619)543-8880 x107 |
or (435)867-8885  |
--|


On Wed, 25 Nov 2015, Catalin Soare wrote:




On Nov 25, 2015 11:54 PM, "Mauro Condarelli"  wrote:
>
>
> Il 25/11/2015 22:23, Catalin Soare ha scritto:
>>
>> Hello there,
>>
>> Maybe it is as you said earlier, an option in the kernel. Namely, the no
multicard support you mentioned earlier, is it possible that was comming
from the kernel itself or was it noveau?
>>
> Thanks Catalin.
>
> Context of said error is:
> ...
> [     7.708] (II) Loading sub module "fbdevhw"
> [     7.708] (II) LoadModule: "fbdevhw"
> [     7.708] (II) Loading /usr/lib/xorg/modules/libfbdevhw.so
> [     7.709] (II) Module fbdevhw: vendor="X.Org Foundation"
> [     7.709]     compiled for 1.17.2, module version = 0.0.2
> [     7.709]     ABI class: X.Org Video Driver, version 19.0
> [     7.709] (WW) Falling back to old probe method for vesa
> [     7.709] (WW) VGA arbiter: cannot open kernel arbiter, no multi-card
support
> [     7.709] (II) Loading sub module "dri2"
> [     7.709] (II) LoadModule: "dri2"
> [     7.709] (II) Module "dri2" already built-in
> [     7.709] (--) NOUVEAU(0): Chipset: "NVIDIA NVE4"
> [     7.709] (II) NOUVEAU(0): Creating default Display subsection in
Screen section
>     "Default Screen Section" for depth/fbbpp 24/32
> [     7.709] (==) NOUVEAU(0): Depth 24, (--) framebuffer bpp 32
> [     7.709] (==) NOUVEAU(0): RGB weight 888
> ...
>
> I do not know where it comes from (if You want I can post or pastebin the
whole log again).
> I tried googling, but never found an explanation, only cited in threads
"solved" by other means.
> VGAarbiter is a kernel module but AFAIK it deals with "legacy VGA devices"
which do not "allow relocation of such (I/O or memory space) ranges"; it is
unclear to me if this applies to my case.
>
> I am willing to experiment, but I need help because I have no experience
with video drivers.
>
> Regards
> Mauro

No need to upload again, I admit I didn't bother to check since apparently
others have already and I don't have experience with Linux drivers.

Personally, what I would do in this case is save the dmesg for debian
somewhere; go back to Mint and check dmesg over there too. Also check if
Mint has blacklisted any modules, such as, for example fbdevhw? Either way,
there should be something that you will find by matching the 2 OSs.

Re: Debian seems unable to drive my (4) monitors

[Mauro Condarelli]

That is indeed the case; thanks.

log of the "failing" debian installation is now at: 
http://paste.debian.net/335212/

The only "strange" thing I see is: "[ 7.709] (WW) VGA arbiter: cannot open kernel 
arbiter, no multi-card support"

Is it relevant? If so what does it mean (and how do I fix it)?
I tried googling, but I didn't find a good answer (I understood this is 
connected to VGA text-mode, but ansvers weren't positive).

Any hint welcome.

Do You need a log also for the "working" Linux Mint live CD (USB, actually) 
boot process?

Thanks
Mauro

Il 23/11/2015 08:32, Dominique Dumont ha scritto:

On Monday 23 November 2015 05:19:43 Mauro Condarelli wrote:

In my case there was NO log to /var/log/xorg.0.log.

Since xorg-server (2:1.17.3-1), Xorg log may end up in ~/.local/share/xorg/

Hope this helps

Re: Debian seems unable to drive my (4) monitors

[Chris Bannister]

On Mon, Nov 23, 2015 at 08:32:43AM +0100, Dominique Dumont wrote:
> On Monday 23 November 2015 05:19:43 Mauro Condarelli wrote:
> > In my case there was NO log to /var/log/xorg.0.log.
> 
> Since xorg-server (2:1.17.3-1), Xorg log may end up in ~/.local/share/xorg/
> 
> Hope this helps

I've only got xserver-xorg installed.

-- 
"If you're not careful, the newspapers will have you hating the people
who are being oppressed, and loving the people who are doing the 
oppressing." --- Malcolm X

Re: Debian seems unable to drive my (4) monitors

[Ric Moore]

On 11/22/2015 10:44 AM, Mauro Condarelli wrote:

Thanks Ric,
care to share details on how You managed such a marvel?
How did You disable the internal (intel) "video card" (actually inside
the CPU chip)? From BIOS?
What other configuration did You do?


I just disabled the video feature in the bios. Then I loaded the nvidia 
driver. Then I used nvidia-settings to use xinerama and to configure the 
order of the monitors. When you "save to X configuration file", save it 
in your home directory as you are "user" and not able to save directly 
to /etc/X11. Open a terminal and "sudo cp xorg.conf /etc/X11"
to put it there. If you have monitors of differing size, the X Server 
Display Configuration will allow you to play tricks, like panning to a 
smaller screen to be bigger through scrolling. Slick! Ric



--
My father, Victor Moore (Vic) used to say:
"There are two Great Sins in the world...
..the Sin of Ignorance, and the Sin of Stupidity.
Only the former may be overcome." R.I.P. Dad.
http://linuxcounter.net/user/44256.html

Re: Debian seems unable to drive my (4) monitors

[Dominique Dumont]

On Monday 23 November 2015 22:15:29 Chris Bannister wrote:
> > Since xorg-server (2:1.17.3-1), Xorg log may end up in
> > ~/.local/share/xorg/
> >
> 
> I've only got xserver-xorg installed.

xorg-server is the name of the source package. xserver-xorg binary packages 
are built from that source package.

See https://tracker.debian.org/pkg/xorg-server

Sorry for the confusion.

All the best

-- 
 https://github.com/dod38fr/   -o- http://search.cpan.org/~ddumont/
http://ddumont.wordpress.com/  -o-   irc: dod at irc.debian.org

Re: Debian seems unable to drive my (4) monitors

[Stefan Monnier]

>> Useful hints are most often found in Xorg.0.log, which for some people at
>> least, is better seen in a "pastebin"[1] than an email attachment.
> Please stop suggesting that! Logs inline or as an attachment are fine.

Agreed.  `pastebin' sucks rocks because when you search the internet for
an error message, all the occurrences in pastebin only tell you "oh,
someone else got this message as well" but don't let you see the
discussion that surrounds it, which is the more interesting part of
the info.


Stefan

Re: Debian seems unable to drive my (4) monitors

[Mauro Condarelli]

http://paste.debian.net/334935/ Is the lspci/lsmod of working (4 monitors) 
Linux Mint.
http://paste.debian.net/335124/ Is the dmesg/lspci/lsmod of the non-ok debian 
(2 monitors on Nvidia, intel monitors dead and second NVidia monitor 
misbehaving (no background redraw))

In both cases no /var/log/Xorg.#.log was generated.
Apparently you have to request it explicitly in /etc/X11/xorg.conf (or 
equivalent).
In my (current) case I had no configuration, so xorg server was "free to chose".

Thanks in advance for any hint.
Regards
Mauro


Il 23/11/2015 05:37, Felix Miata ha scritto:

Mauro Condarelli composed on 2015-11-23 05:19 (UTC+0100):


No need to make so much fuss about the way I sent logs: I sent them directly 
attaching them in Thunderbird and via paste.debian.net.

I never found any link in any of your emails to paste.debian.net


In my case there was NO log to /var/log/xorg.0.log.

What about /var/log/Xorg.0.log? If none, it indicates your installation
included no Xorg or KDE or Gnome or etc. was installed. What exactly appeared
on the two monitors attached to the same "card"?

Re: Debian seems unable to drive my (4) monitors

[Dominique Dumont]

On Monday 23 November 2015 05:19:43 Mauro Condarelli wrote:
> In my case there was NO log to /var/log/xorg.0.log.

Since xorg-server (2:1.17.3-1), Xorg log may end up in ~/.local/share/xorg/

Hope this helps
-- 
 https://github.com/dod38fr/   -o- http://search.cpan.org/~ddumont/
http://ddumont.wordpress.com/  -o-   irc: dod at irc.debian.org

Re: Debian seems unable to drive my (4) monitors

[Chris Bannister]

On Sun, Nov 22, 2015 at 08:09:01AM -0500, Felix Miata wrote:
> Mauro Condarelli composed on 2015-11-22 13:24 (UTC+0100):
> 
> > I have been able to make them *both* work (using custom xorg.conf), but not 
> > *at the same time* (under debian)
> 
> > The working setup (linixmint) does not appear to use any proprietary driver 
> > (i.e.: it uses nouveau for NVidia).
> 
> > I attach here full lspci and lsmod output (of *working* setup; i.e. LM) in 
> > case they give some hint.
> 
> I only found your lsmod output.
> 
> Useful hints are most often found in Xorg.0.log, which for some people at
> least, is better seen in a "pastebin"[1] than an email attachment.

Please stop suggesting that! Logs inline or as an attachment are fine.
It would be nice if the poster trimmmed them a bit, but better too much
than too little.

-- 
"If you're not careful, the newspapers will have you hating the people
who are being oppressed, and loving the people who are doing the 
oppressing." --- Malcolm X

Re: Debian seems unable to drive my (4) monitors

[Felix Miata]

Chris Bannister composed on 2015-11-23 12:19 (UTC+1300):

>> Useful hints are most often found in Xorg.0.log, which for some people at
>> least, is better seen in a "pastebin"[1] than an email attachment.

> Please stop suggesting that!

Sorry, won't do that. It's only a suggestion, nothing like an order.

> Logs inline or as an attachment are fine.

Fine for people interested in responding to them who don't care when included
logs wrap into an inexplicable mess. That group excludes me.
-- 
"The wise are known for their understanding, and pleasant
words are persuasive." Proverbs 16:21 (New Living Translation)

 Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!

Felix Miata  ***  http://fm.no-ip.com/

Re: Debian seems unable to drive my (4) monitors

[Gene Heskett]

On Sunday 22 November 2015 18:49:17 Felix Miata wrote:

> Charlie Kravetz composed on 2015-11-22 16:31 (UTC-0700):
> > As a new user of this mailing list, is it wrong to use pastebin? Did
> > I miss a requirement to insure logs are always included in my emails
> > instead?
>
> Xorg.0.log contains bits that can be considerd personal in nature.

How so? I don't recall ever seeing a passwd, or a list of my meds 
included in it.

Please explain just what it is in the way of personal info that we are to 
expunge before posting.

> Having them them included in the email means the archive contains that
> information indefinitely.
>
> Xorg.0.log can be rather large, while "Avoid sending large
> attachments." and "Use common sense all the time." are parts of the
> Code of conduct. https://www.debian.org/MailingLists/


Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 

Re: Debian seems unable to drive my (4) monitors

[Charlie Kravetz]

On Mon, 23 Nov 2015 12:19:20 +1300
Chris Bannister  wrote:

>On Sun, Nov 22, 2015 at 08:09:01AM -0500, Felix Miata wrote:
>> Mauro Condarelli composed on 2015-11-22 13:24 (UTC+0100):
>>   
>> > I have been able to make them *both* work (using custom xorg.conf), but 
>> > not *at the same time* (under debian)  
>>   
>> > The working setup (linixmint) does not appear to use any proprietary 
>> > driver (i.e.: it uses nouveau for NVidia).  
>>   
>> > I attach here full lspci and lsmod output (of *working* setup; i.e. LM) in 
>> > case they give some hint.  
>> 
>> I only found your lsmod output.
>> 
>> Useful hints are most often found in Xorg.0.log, which for some people at
>> least, is better seen in a "pastebin"[1] than an email attachment.  
>
>Please stop suggesting that! Logs inline or as an attachment are fine.
>It would be nice if the poster trimmmed them a bit, but better too much
>than too little.
>

As a new user of this mailing list, is it wrong to use pastebin? Did I
miss a requirement to insure logs are always included in my emails
instead?

-- 
Charlie Kravetz
Linux Registered User Number 425914
[http://linuxcounter.net/user/425914.html]
Never let anyone steal your DREAM.   [http://keepingdreams.com]

Re: Debian seems unable to drive my (4) monitors

[Felix Miata]

Charlie Kravetz composed on 2015-11-22 16:31 (UTC-0700):

> As a new user of this mailing list, is it wrong to use pastebin? Did I
> miss a requirement to insure logs are always included in my emails
> instead?

Xorg.0.log contains bits that can be considerd personal in nature. Having
them them included in the email means the archive contains that information
indefinitely.

Xorg.0.log can be rather large, while "Avoid sending large attachments." and
"Use common sense all the time." are parts of the Code of conduct.
https://www.debian.org/MailingLists/
-- 
"The wise are known for their understanding, and pleasant
words are persuasive." Proverbs 16:21 (New Living Translation)

 Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!

Felix Miata  ***  http://fm.no-ip.com/

Re: Debian seems unable to drive my (4) monitors

[Gene Heskett]

On Sunday 22 November 2015 18:37:47 Felix Miata wrote:

> Chris Bannister composed on 2015-11-23 12:19 (UTC+1300):
> >> Useful hints are most often found in Xorg.0.log, which for some
> >> people at least, is better seen in a "pastebin"[1] than an email
> >> attachment.
> >
> > Please stop suggesting that!
>
> Sorry, won't do that. It's only a suggestion, nothing like an order.
>
> > Logs inline or as an attachment are fine.
>
> Fine for people interested in responding to them who don't care when
> included logs wrap into an inexplicable mess. That group excludes me.

Me too. +10 if I had that many votes.

If I am to read a log, and that log contains lines 200 characters long, 
most of our email readers /can/ handle that, so PLEASE turn off the 
word-wrap in your email agent long enough to post a log unmolested by 
senseless word-wrapping.  That is a huge help to those of us who might 
be interested in helping.  Word-wrap it so it makes no sense, and I'll 
just hit the + key (kmail) to go on to the next message.

Cheers, Gene Heskett
-- 
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page 

Re: Debian seems unable to drive my (4) monitors

[Felix Miata]

Gene Heskett composed on 2015-11-22 19:29 (UTC-0500):

> Felix Miata wrote:

>> Xorg.0.log contains bits that can be considerd personal in nature.

> How so? I don't recall ever seeing a passwd, or a list of my meds 
> included in it.

> Please explain just what it is in the way of personal info that we are to 
> expunge before posting.

"can be considered" means opinions are involved, and possibly nothing is
actually risky or personal or needs redaction. I'm not going to catalog what
bits might be among them. One to consider:

hostname
-- 
"The wise are known for their understanding, and pleasant
words are persuasive." Proverbs 16:21 (New Living Translation)

 Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!

Felix Miata  ***  http://fm.no-ip.com/

Re: Debian seems unable to drive my (4) monitors

[Mauro Condarelli]

Whoa!
No need to make so much fuss about the way I sent logs: I sent them directly 
attaching them in Thunderbird and via paste.debian.net.
In my case there was NO log to /var/log/xorg.0.log.
Can someone suggest how can I understand what's wrong with debian install? ... 
or is the implicit answer to go to Mint?
After zillions of messages discussing what I should, should not, and perhaps would, do 
(not to mention the "meaning of should" to which we should give a cold 
shoulder) is there someone willing to give some hint?
The best I got is "It works fine on my machine" (implying I must be non compos 
mentis).
I have high respect of Debian philosophy and practice, but the list seems to be 
drifting a way a bit too much.
Signal/noise ratio is dangerously approaching usenet standards.

Sorry for the rant, but I'm really tired right now (05:18 AM here and i 
finished coffee supply some hours ago)
g'nite!
Mauro


Il 23/11/2015 02:06, Felix Miata ha scritto:

Gene Heskett composed on 2015-11-22 19:29 (UTC-0500):


Felix Miata wrote:

Xorg.0.log contains bits that can be considerd personal in nature.

How so? I don't recall ever seeing a passwd, or a list of my meds
included in it.
Please explain just what it is in the way of personal info that we are to
expunge before posting.

"can be considered" means opinions are involved, and possibly nothing is
actually risky or personal or needs redaction. I'm not going to catalog what
bits might be among them. One to consider:

hostname

Re: Debian seems unable to drive my (4) monitors

[Felix Miata]

Mauro Condarelli composed on 2015-11-23 05:19 (UTC+0100):

> No need to make so much fuss about the way I sent logs: I sent them directly 
> attaching them in Thunderbird and via paste.debian.net.

I never found any link in any of your emails to paste.debian.net

> In my case there was NO log to /var/log/xorg.0.log.

What about /var/log/Xorg.0.log? If none, it indicates your installation
included no Xorg or KDE or Gnome or etc. was installed. What exactly appeared
on the two monitors attached to the same "card"?
-- 
"The wise are known for their understanding, and pleasant
words are persuasive." Proverbs 16:21 (New Living Translation)

 Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!

Felix Miata  ***  http://fm.no-ip.com/

Re: Debian seems unable to drive my (4) monitors

[Mauro Condarelli]

Hi,
comments below.

Il 22/11/2015 14:09, Felix Miata ha scritto:

Mauro Condarelli composed on 2015-11-22 13:24 (UTC+0100):


I have been able to make them *both* work (using custom xorg.conf), but not *at 
the same time* (under debian)
The working setup (linixmint) does not appear to use any proprietary driver 
(i.e.: it uses nouveau for NVidia).
I attach here full lspci and lsmod output (of *working* setup; i.e. LM) in case 
they give some hint.

I only found your lsmod output.

Useful hints are most often found in Xorg.0.log, which for some people at
least, is better seen in a "pastebin"[1] than an email attachment.

the whole packed is available at: http://paste.debian.net/334935/

I currently am under Win7 (on the same hardware) and I cannot switch.
I will post Xorg.0.log of both machines (BTW I already looked several times at 
the failing one, without any success, but You eyes could be trained better than 
mine, of course) ASAP.

Regards
Mauro

Also, what brand and model is your motherboard? FWIW, most motherboards
disable the onboard video when PCIe slot(s) is/are populated by gfxcard, so
it's nice to know when someone finds one lacking this limitation. Knowing CPU
model might also be useful if the video is in the CPU rather than on a
separate chip on the board.

[1] e.g. http://paste.debian.net/ or your own personal web space

Re: Debian seems unable to drive my (4) monitors

[Mauro Condarelli]

Thanks Ric,
care to share details on how You managed such a marvel?
How did You disable the internal (intel) "video card" (actually inside the CPU 
chip)? From BIOS?
What other configuration did You do?

TiA
Mauro

Il 22/11/2015 16:24, Ric Moore ha scritto:

On 11/22/2015 07:03 AM, Richard Owlett wrote:

On 11/22/2015 5:46 AM, Mauro Condarelli wrote:

I have a setup with two video cards (intel HD Graphics 4600 +
NVidia GeForce GTX 770) and four monitors (two for each card).
I can see all monitors under Windows, but I can see (active, of
course) only two under debian (on the same card).
I tried several configurations to no avail and finally I gave up :(


I disabled my onboard video and installed an identical nvidia card in a spare 
PCIe slot. Now I have all four monitors running with the nvidia driver, all 
fully accelerated. Native Linux games can run spread across them and it's a 
mindblast! I can move applications between them with no tearing. Nice. Ric

Re: Debian seems unable to drive my (4) monitors

[Ric Moore]

On 11/22/2015 07:03 AM, Richard Owlett wrote:

On 11/22/2015 5:46 AM, Mauro Condarelli wrote:

I have a setup with two video cards (intel HD Graphics 4600 +
NVidia GeForce GTX 770) and four monitors (two for each card).
I can see all monitors under Windows, but I can see (active, of
course) only two under debian (on the same card).
I tried several configurations to no avail and finally I gave up :(


I disabled my onboard video and installed an identical nvidia card in a 
spare PCIe slot. Now I have all four monitors running with the nvidia 
driver, all fully accelerated. Native Linux games can run spread across 
them and it's a mindblast! I can move applications between them with no 
tearing. Nice. Ric




--
My father, Victor Moore (Vic) used to say:
"There are two Great Sins in the world...
..the Sin of Ignorance, and the Sin of Stupidity.
Only the former may be overcome." R.I.P. Dad.
http://linuxcounter.net/user/44256.html

Re: Debian seems unable to drive my (4) monitors

[Mauro Condarelli]

I have been able to make them *both* work (using custom xorg.conf), but not *at 
the same time* (under debian)

The working setup (linixmint) does not appear to use any proprietary driver 
(i.e.: it uses nouveau for NVidia).

I attach here full lspci and lsmod output (of *working* setup; i.e. LM) in case 
they give some hint.

TiA
MAuro


Il 22/11/2015 13:03, Richard Owlett ha scritto:

On 11/22/2015 5:46 AM, Mauro Condarelli wrote:

I have a setup with two video cards (intel HD Graphics 4600 +
NVidia GeForce GTX 770) and four monitors (two for each card).
I can see all monitors under Windows, but I can see (active, of
course) only two under debian (on the same card).
I tried several configurations to no avail and finally I gave up :(

Yesterday I discovered another data point:
Linuxmint (I tested the "live" distribution) can drive all my
monitors, apparently with no configuration at all (no
/etc/X11/xorg.conf or similar).

LMDE (Linux Mint Debian Edition - essentially the same
distribution, but based on Debian instead of Ubuntu) has the same
problems of plain debian.


Which card does *NOT* work? Does it require a non-free driver?
[My Debian machine is a laptop so I never used multiple monitors]





I *suspect* problem comes from different options enabled (kernel
config?), but I have no idea how to debug such a thing.

I did a dump of lspci and lsmod on the working (lm) system and my
next move will be to get a similar dump on the non
working(debian) setup.
Is there anything else I should check?
As said: the working system has no explicit xorg configuration.

Please help me; I would hate to leave debian world (I was here
since the beginnings, coming from slackware to "buzz").

Regards
Mauro






Module  Size  Used by
intel_rapl 20480  0 
iosf_mbi   16384  1 intel_rapl
x86_pkg_temp_thermal16384  0 
intel_powerclamp   20480  0 
coretemp   16384  0 
arc4   16384  2 
joydev 20480  0 
kvm_intel 151552  0 
ath9k 147456  0 
kvm   479232  1 kvm_intel
ath9k_common   32768  1 ath9k
snd_hda_codec_hdmi 53248  2 
snd_hda_codec_realtek81920  1 
snd_hda_codec_generic69632  1 snd_hda_codec_realtek
ath9k_hw  458752  2 ath9k_common,ath9k
dm_crypt   24576  0 
snd_hda_intel  36864  8 snd_hda_codec_hdmi
hid_generic16384  0 
snd_hda_controller 32768  1 snd_hda_intel
pl2303 20480  0 
usbhid 53248  0 
snd_hda_codec 143360  5 
snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_codec_generic,snd_hda_intel,snd_hda_controller
usbserial  49152  1 pl2303
ath32768  3 ath9k_common,ath9k,ath9k_hw
hid   110592  2 hid_generic,usbhid
mac80211  708608  1 ath9k
snd_hwdep  20480  1 snd_hda_codec
crct10dif_pclmul   16384  0 
crc32_pclmul   16384  0 
snd_pcm   106496  4 
snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel,snd_hda_controller
eeepc_wmi  16384  0 
ghash_clmulni_intel16384  0 
asus_wmi   24576  1 eeepc_wmi
aesni_intel   172032  0 
snd_seq_midi   16384  0 
sparse_keymap  16384  1 asus_wmi
snd_seq_midi_event 16384  1 snd_seq_midi
snd_rawmidi32768  1 snd_seq_midi
bnep   20480  2 
aes_x86_64 20480  2 aesni_intel
lrw16384  1 aesni_intel
snd_seq65536  2 snd_seq_midi_event,snd_seq_midi
ath3k  20480  0 
cfg80211  524288  4 ath,ath9k_common,ath9k,mac80211
btusb  40960  0 
gf128mul   16384  1 lrw
rfcomm 69632  8 
snd_seq_device 16384  3 snd_seq,snd_rawmidi,snd_seq_midi
glue_helper16384  1 aesni_intel
mei_me 20480  0 
dm_multipath   24576  0 
bluetooth 491520  23 bnep,ath3k,btusb,rfcomm
snd_timer  32768  2 snd_pcm,snd_seq
ablk_helper16384  1 aesni_intel
scsi_dh16384  1 dm_multipath
mei90112  1 mei_me
soc_button_array   16384  0 
serio_raw  16384  0 
cryptd 20480  3 ghash_clmulni_intel,aesni_intel,ablk_helper
snd86016  25 
snd_hda_codec_realtek,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_seq,snd_rawmidi,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel,snd_seq_device
mac_hid16384  0 
soundcore  16384  2 snd,snd_hda_codec
lpc_ich24576  0 
shpchp 40960  0 
tpm_infineon   20480  0 
parport_pc 32768  0 
ppdev  20480  0 
lp 20480  0 
parport45056  3 lp,ppdev,parport_pc
binfmt_misc20480  1 
squashfs   49152  1 
overlay45056  1 
nls_iso8859_1  16384  1 
dm_mirror

Re: Debian seems unable to drive my (4) monitors

[Felix Miata]

Mauro Condarelli composed on 2015-11-22 13:24 (UTC+0100):

> I have been able to make them *both* work (using custom xorg.conf), but not 
> *at the same time* (under debian)

> The working setup (linixmint) does not appear to use any proprietary driver 
> (i.e.: it uses nouveau for NVidia).

> I attach here full lspci and lsmod output (of *working* setup; i.e. LM) in 
> case they give some hint.

I only found your lsmod output.

Useful hints are most often found in Xorg.0.log, which for some people at
least, is better seen in a "pastebin"[1] than an email attachment.

Also, what brand and model is your motherboard? FWIW, most motherboards
disable the onboard video when PCIe slot(s) is/are populated by gfxcard, so
it's nice to know when someone finds one lacking this limitation. Knowing CPU
model might also be useful if the video is in the CPU rather than on a
separate chip on the board.

[1] e.g. http://paste.debian.net/ or your own personal web space
-- 
"The wise are known for their understanding, and pleasant
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 Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!

Felix Miata  ***  http://fm.no-ip.com/

Debian seems unable to drive my (4) monitors

[Mauro Condarelli]

I have a setup with two video cards (intel HD Graphics 4600 + NVidia GeForce 
GTX 770) and four monitors (two for each card).
I can see all monitors under Windows, but I can see (active, of course) only 
two under debian (on the same card).
I tried several configurations to no avail and finally I gave up :(

Yesterday I discovered another data point:
Linuxmint (I tested the "live" distribution) can drive all my monitors, 
apparently with no configuration at all (no /etc/X11/xorg.conf or similar).

LMDE (Linux Mint Debian Edition - essentially the same distribution, but based 
on Debian instead of Ubuntu) has the same problems of plain debian.

I *suspect* problem comes from different options enabled (kernel config?), but 
I have no idea how to debug such a thing.

I did a dump of lspci and lsmod on the working (lm) system and my next move 
will be to get a similar dump on the non working(debian) setup.
Is there anything else I should check?
As said: the working system has no explicit xorg configuration.

Please help me; I would hate to leave debian world (I was here since the beginnings, 
coming from slackware to "buzz").

Regards
Mauro

Re: Debian seems unable to drive my (4) monitors

[Richard Owlett]

On 11/22/2015 5:46 AM, Mauro Condarelli wrote:

I have a setup with two video cards (intel HD Graphics 4600 +
NVidia GeForce GTX 770) and four monitors (two for each card).
I can see all monitors under Windows, but I can see (active, of
course) only two under debian (on the same card).
I tried several configurations to no avail and finally I gave up :(

Yesterday I discovered another data point:
Linuxmint (I tested the "live" distribution) can drive all my
monitors, apparently with no configuration at all (no
/etc/X11/xorg.conf or similar).

LMDE (Linux Mint Debian Edition - essentially the same
distribution, but based on Debian instead of Ubuntu) has the same
problems of plain debian.


Which card does *NOT* work? Does it require a non-free driver?
[My Debian machine is a laptop so I never used multiple monitors]





I *suspect* problem comes from different options enabled (kernel
config?), but I have no idea how to debug such a thing.

I did a dump of lspci and lsmod on the working (lm) system and my
next move will be to get a similar dump on the non
working(debian) setup.
Is there anything else I should check?
As said: the working system has no explicit xorg configuration.

Please help me; I would hate to leave debian world (I was here
since the beginnings, coming from slackware to "buzz").

Regards
Mauro