Re: NVIDIA - URGENT

2011-07-08 Thread Max
Confirming this error. I recently tried to install NVIDIA drivers for my
9500 GT graphic card, but it didn't work. After digging up a bit, I
believe the error's coming from a libgl1-mesa-glx update.

Jonathan


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Re: NVIDIA - URGENT

2011-07-08 Thread Ralf Mardorf
 
   Forwarded Message 
  From: Max jonhan...@gmail.com
  To: debian-user@lists.debian.org
  Subject: Re: NVIDIA - URGENT
  Date: Sat, 02 Jul 2011 21:44:22 +0200
  
  Confirming this error. I recently tried to install NVIDIA drivers for my
  9500 GT graphic card, but it didn't work. After digging up a bit, I
  believe the error's coming from a libgl1-mesa-glx update.

When I said that I pinned X I wasn't very precise. A short while ago I
need to re-pin packages, currently the locked packages are:

libgl1-mesa-dri
libgl1-mesa-glx
libglu1-mesa
libglu1-mesa-dev
mesa-common-dev

all packages are version 7.10.2-3

I did install Debian stable, but after installing I upgraded to testing,
excepted of all or most X packages, I kept those packages at stable,
resp. some were upgraded.
The mesa packages seems to be from testing, but they aren't available
anymore.


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Re: NVIDIA - URGENT

2011-07-08 Thread Ralf Mardorf
On Fri, 2011-07-08 at 23:02 +0200, Ralf Mardorf wrote:
  
    Forwarded Message 
   From: Max jonhan...@gmail.com
   To: debian-user@lists.debian.org
   Subject: Re: NVIDIA - URGENT
   Date: Sat, 02 Jul 2011 21:44:22 +0200
   
   Confirming this error. I recently tried to install NVIDIA drivers for my
   9500 GT graphic card, but it didn't work. After digging up a bit, I
   believe the error's coming from a libgl1-mesa-glx update.
 
 When I said that I pinned X I wasn't very precise. A short while ago I
 need to re-pin packages, currently the locked packages are:
 
 libgl1-mesa-dri
 libgl1-mesa-glx
 libglu1-mesa
 libglu1-mesa-dev
 mesa-common-dev
 
 all packages are version 7.10.2-3
 
 I did install Debian stable, but after installing I upgraded to testing,
 excepted of all or most X packages, I kept those packages at stable,
 resp. some were upgraded.
 The mesa packages seems to be from testing, but they aren't available
 anymore.

FWIW I only try to keep xserver-xorg-video-nv for self build kernel-rt
and the proprietary nvidia what version ever is available (currently
173x) for self build kernel ex 2.6.39 with 'rt patch emulation'.

Last time when there were X upgrades the above mesa packages tried to
remove the nv and the proprietary 173x driver. I could unlock some x
packages, but had to lock this and no other mesa packages.


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Re: NVIDIA - URGENT

2011-07-04 Thread Sven Joachim
On 2011-07-04 00:58 +0200, Andrej Kacian wrote:

 On Sat, 02 Jul 2011 23:54:01 +0200
 Hans Vogelsberger li@schwaz.net wrote:

instead of moving 
/etc/X11/xorg.conf, I again changed its driver line in section device 
to nouveau - and SUCCEDED: After a reboot xdm started X normally, not 
even startx was necessary.

 I tried to do the same, but alas, Xorg doesn't like noveau driver:

 [  1528.909] drmOpenDevice: node name is /dev/dri/card0
 [  1528.916] drmOpenByBusid: Searching for BusID pci::01:00.0
 [  1528.916] drmOpenDevice: node name is /dev/dri/card0
 [  1528.924] drmOpenByBusid: drmOpenMinor returns -1
 [...]
 [  1529.044] (EE) [drm] failed to open device
 [  1529.044] (EE) No devices detected.

 It should work, though, GT200 series should be supported by nouveau.

Looks like Kernel Modesetting is disabled, either through a boot
parameter or via a file in /etc/modprobe.d.  Try reloading the nouveau
kernel module:

rmmod nouveau
nouveau modprobe modeset=1

and restart X.

Sven


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Re: NVIDIA - URGENT

2011-07-04 Thread Andrej Kacian
On Mon, 04 Jul 2011 09:38:01 +0200
Sven Joachim svenj...@gmx.de wrote:

 I tried to do the same, but alas, Xorg doesn't like noveau driver:

 [  1528.909] drmOpenDevice: node name is /dev/dri/card0
 [  1528.916] drmOpenByBusid: Searching for BusID pci::01:00.0
 [  1528.916] drmOpenDevice: node name is /dev/dri/card0
 [  1528.924] drmOpenByBusid: drmOpenMinor returns -1
 [...]
 [  1529.044] (EE) [drm] failed to open device
 [  1529.044] (EE) No devices detected.

 It should work, though, GT200 series should be supported by nouveau.  

Looks like Kernel Modesetting is disabled, either through a boot
parameter or via a file in /etc/modprobe.d.  Try reloading the nouveau
kernel module:

rmmod nouveau
nouveau modprobe modeset=1

and restart X.

Thanks for the tip, but I already installed nvidia-glx from sid, and am now
happily using it. I wrote this little gem of knowledge down for the future,
though. :)

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Re: NVIDIA - URGENT

2011-07-04 Thread Tato - Otávio Santos
Hi there.
What about a solution 4 you all?

We just need to restore our last versions of:
xserver-common
xserver-xorg-core
libgl1-mesa-glx
libglu1-mesa
libgl1-mesa-dev
libgl1-mesa-dri
mesa-common-dev

go to /var/cache/apt/archives
then sudo dpkg -i the following files:

xserver-common_2%3a1.10.2-1+wheezy1_all.deb
xserver-xorg-core_2%3a1.10.2-1+wheezy1_i386.deb
libglu1-mesa_7.10.2-3_i386.deb
libgl1-mesa-glx_7.10.2-3_i386.deb
libgl1-mesa-dri_7.10.2-3_i386.deb
libgl1-mesa-dev_7.10.2-3_i386.deb
mesa-common-dev_7.10.2-3_i386.deb

Using a 64bit sys? Ok, just change the i386.

Ok, you were dumb and cleaned your system after the update(So do I)?
pkgs.org/package/ can solve it ;)

We're about to get our X working again. Just sudo apt-get install :
libgl1-nvidia-glx
libgl1-nvidia-alternatives
nvidia-glx

X working again!


Re: NVIDIA - URGENT

2011-07-03 Thread Aniruddha
On Sat, Jul 2, 2011 at 6:44 PM, Hans Vogelsberger li@schwaz.net wrote:
 Todays testing update, safe-upgrade and full-upgrade totally killed my X
 which ran with NVIDIA driver. Even this posting I must send from my old
 computer which is in a terrible state because I did nothing on it since I
 use the new one. Without X, most work I do on my computer cannot be done.



I had the same issue I've solved doing a upgrade to sid. I recommend
you to install Debian stable though.


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Re: NVIDIA - URGENT

2011-07-03 Thread David Baron
 I know this is playing with fire but I did this:
 sudo ln -s /etc/alternatives/libGL.so.1 /usr/lib/i386-linux-gnu/libGL.so.1
 
 This points the multiarch version to where the /usr/lib version points.
 Save the original symlink to libGL.so.1.2 to be safe but easy enough to
 restore is need be. You might also manually point the nvidia/diversion to
 that one.
 
 Anyway, I had X and NVidia driver working fine but openGL apps crashed out.
 After this symlink, flightgear started fine so it fixed my problem in any
 event. Nouveau might not find libGL at all right now.

However, when I restart the computer, this change seems to get undone! I am 
not upgrading any mesa, glu, nvidia, any of it! I even have a pkg-divert on 
this. Still gets undone.


Re: NVIDIA - URGENT

2011-07-03 Thread Andrej Kacian
On Sat, 02 Jul 2011 23:54:01 +0200
Hans Vogelsberger li@schwaz.net wrote:

instead of moving 
/etc/X11/xorg.conf, I again changed its driver line in section device 
to nouveau - and SUCCEDED: After a reboot xdm started X normally, not 
even startx was necessary.

I tried to do the same, but alas, Xorg doesn't like noveau driver:

[  1528.909] drmOpenDevice: node name is /dev/dri/card0
[  1528.916] drmOpenByBusid: Searching for BusID pci::01:00.0
[  1528.916] drmOpenDevice: node name is /dev/dri/card0
[  1528.924] drmOpenByBusid: drmOpenMinor returns -1
[  1528.924] drmOpenDevice: node name is /dev/dri/card1
[  1528.929] drmOpenByBusid: drmOpenMinor returns -1
[  1528.929] drmOpenDevice: node name is /dev/dri/card2
[  1528.932] drmOpenByBusid: drmOpenMinor returns -1
[  1528.932] drmOpenDevice: node name is /dev/dri/card3
[  1528.936] drmOpenByBusid: drmOpenMinor returns -1
[  1528.936] drmOpenDevice: node name is /dev/dri/card4
[  1528.940] drmOpenByBusid: drmOpenMinor returns -1
[  1528.940] drmOpenDevice: node name is /dev/dri/card5
[  1528.944] drmOpenByBusid: drmOpenMinor returns -1
[  1528.944] drmOpenDevice: node name is /dev/dri/card6
[  1528.947] drmOpenByBusid: drmOpenMinor returns -1
[  1528.947] drmOpenDevice: node name is /dev/dri/card7
[  1528.951] drmOpenByBusid: drmOpenMinor returns -1
[  1528.951] drmOpenDevice: node name is /dev/dri/card8
[  1528.955] drmOpenByBusid: drmOpenMinor returns -1
[  1528.955] drmOpenDevice: node name is /dev/dri/card9
[  1528.959] drmOpenByBusid: drmOpenMinor returns -1
[  1528.959] drmOpenDevice: node name is /dev/dri/card10
[  1528.962] drmOpenByBusid: drmOpenMinor returns -1
[  1528.962] drmOpenDevice: node name is /dev/dri/card11
[  1528.966] drmOpenByBusid: drmOpenMinor returns -1
[  1528.966] drmOpenDevice: node name is /dev/dri/card12
[  1528.970] drmOpenByBusid: drmOpenMinor returns -1
[  1528.970] drmOpenDevice: node name is /dev/dri/card13
[  1528.973] drmOpenByBusid: drmOpenMinor returns -1
[  1528.973] drmOpenDevice: node name is /dev/dri/card14
[  1528.977] drmOpenByBusid: drmOpenMinor returns -1
[  1528.977] drmOpenDevice: node name is /dev/dri/card15
[  1528.981] drmOpenByBusid: drmOpenMinor returns -1
[  1528.981] drmOpenDevice: node name is /dev/dri/card0
[  1528.986] drmOpenDevice: node name is /dev/dri/card0
[  1528.989] drmOpenDevice: node name is /dev/dri/card1
[  1528.993] drmOpenDevice: node name is /dev/dri/card2
[  1528.997] drmOpenDevice: node name is /dev/dri/card3
[  1529.001] drmOpenDevice: node name is /dev/dri/card4
[  1529.004] drmOpenDevice: node name is /dev/dri/card5
[  1529.008] drmOpenDevice: node name is /dev/dri/card6
[  1529.012] drmOpenDevice: node name is /dev/dri/card7
[  1529.015] drmOpenDevice: node name is /dev/dri/card8
[  1529.019] drmOpenDevice: node name is /dev/dri/card9
[  1529.023] drmOpenDevice: node name is /dev/dri/card10
[  1529.026] drmOpenDevice: node name is /dev/dri/card11
[  1529.030] drmOpenDevice: node name is /dev/dri/card12
[  1529.033] drmOpenDevice: node name is /dev/dri/card13
[  1529.037] drmOpenDevice: node name is /dev/dri/card14
[  1529.041] drmOpenDevice: node name is /dev/dri/card15
[  1529.044] (EE) [drm] failed to open device
[  1529.044] (EE) No devices detected.

It should work, though, GT200 series should be supported by nouveau.

root@penny:/etc/X11# lspci | grep -i nv
01:00.0 VGA compatible controller: nVidia Corporation GT200 [GeForce GTX 260]
(rev a1)

Any ideas?

Thanks in advance,
-- 
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NVIDIA - URGENT

2011-07-02 Thread Hans Vogelsberger
Todays testing update, safe-upgrade and full-upgrade totally killed my X 
which ran with NVIDIA driver. Even this posting I must send from my old 
computer which is in a terrible state because I did nothing on it since 
I use the new one. Without X, most work I do on my computer cannot be done.


Nouveau did not work after I bought my Fujitsu in January. Installing 
xserver-xorg-video-nouveau, xserver-xorg-video-nouveau-dbg, 
libdrm-nouveau1a, and libdrm-nouveau1a-dbg and changing the Driver line 
in Section Device of /etc/X11/xorg.conf with Vim from NVIDIA to 
nouveau and after another reboot to NOUVEAU did not work either. The 
Identifier line was NVIDIA GeForce 9300 GE and thus correct, the other 
sections in xorg.conf were not printed but configured elsewhere, and xdm 
and xfce4 had worked well all the time.


I rechanged the Driver line with Vim again back to NVIDIA, rebootet 
and dpkg-reconfigured whatever seemed necessary, And rebootet again. 
Near the end of /var/log/Xorg.0.log the following lines showed up:

(II) Loading extension DRI2
(II) LoadModule: nvidia
(WW) Warning: couldn't open module nvidia
(II) Unloading module nvidia
(EE) Failed to load module nvidia
These seem to be the important lines and are the same in Xorg.0.log and 
in Xorg.0.log.old. The logs with nouveau are lost. I rebootet to often 
and there is only one Xorg.0.log.old file. As far as I remember those 
lines did not look notably different from the nvidia ones.


Is there something I can do, or is it necessary to install Wheezy anew?
In this case I hope it is enough to repartition / and /boot partitions 
and leave the other ones as they are.


Yours
Hans Vogelsberger

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Re: NVIDIA - URGENT

2011-07-02 Thread Patrick Wiseman
On Sat, Jul 2, 2011 at 12:44 PM, Hans Vogelsberger li@schwaz.net wrote:
 Todays testing update, safe-upgrade and full-upgrade totally killed my X
 which ran with NVIDIA driver. Even this posting I must send from my old
 computer which is in a terrible state because I did nothing on it since I
 use the new one. Without X, most work I do on my computer cannot be done.

I just had exactly the same problem.  nvidia-glx cannot be installed,
apparently, as it breaks everything (or a bunch of other stuff).
Using aptitude, I manually removed all of the nvidia packages
(nvidia-kernel-common, -dkms, etc.), installed xorg-video-nouveau
(although I'd rather use the proprietary driver), moved
/etc/X11/xorg.conf (a file generated by nvidia-config which tries to
load the nvidia module, so that 'startx' still fails), after all of
which 'startx' finally worked.  I tried all kinds of ways to try to
get the nvidia drivers to work, but had no luck.  At least now I'm in
X, albeit with the nouveau driver.  Who knows?  Maybe it will turn out
to be OK.

Patrick


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Re: NVIDIA - URGENT

2011-07-02 Thread Chris Brennan
* Hans Vogelsberger li@schwaz.net [2011-07-02 18:44:43 +0200]:

 Todays testing update, safe-upgrade and full-upgrade totally killed my X 
 which ran with NVIDIA driver. Even this posting I must send from my old 
 computer which is in a terrible state because I did nothing on it since 
 I use the new one. Without X, most work I do on my computer cannot be done.
 
 Nouveau did not work after I bought my Fujitsu in January. Installing 
 xserver-xorg-video-nouveau, xserver-xorg-video-nouveau-dbg, 
 libdrm-nouveau1a, and libdrm-nouveau1a-dbg and changing the Driver line 
 in Section Device of /etc/X11/xorg.conf with Vim from NVIDIA to 
 nouveau and after another reboot to NOUVEAU did not work either. The 
 Identifier line was NVIDIA GeForce 9300 GE and thus correct, the other 
 sections in xorg.conf were not printed but configured elsewhere, and xdm 
 and xfce4 had worked well all the time.
 
 I rechanged the Driver line with Vim again back to NVIDIA, rebootet 
 and dpkg-reconfigured whatever seemed necessary, And rebootet again. 
 Near the end of /var/log/Xorg.0.log the following lines showed up:
 (II) Loading extension DRI2
 (II) LoadModule: nvidia
 (WW) Warning: couldn't open module nvidia
 (II) Unloading module nvidia
 (EE) Failed to load module nvidia
 These seem to be the important lines and are the same in Xorg.0.log and 
 in Xorg.0.log.old. The logs with nouveau are lost. I rebootet to often 
 and there is only one Xorg.0.log.old file. As far as I remember those 
 lines did not look notably different from the nvidia ones.
 
 Is there something I can do, or is it necessary to install Wheezy anew?
 In this case I hope it is enough to repartition / and /boot partitions 
 and leave the other ones as they are.
 
 Yours
 Hans Vogelsberger
 

Hans,
Try reinstalling the nvidia driver, the kernel likely changed during 
your upgrade and the driver needs to have his kernel module recompiled 
against the new kernel version. Try that and report back.

-- 
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Re: NVIDIA - URGENT

2011-07-02 Thread Patrick Wiseman
On Sat, Jul 2, 2011 at 1:04 PM, Chris Brennan xa...@xaerolimit.net wrote:
 * Hans Vogelsberger li@schwaz.net [2011-07-02 18:44:43 +0200]:

 Todays testing update, safe-upgrade and full-upgrade totally killed my X
 which ran with NVIDIA driver. Even this posting I must send from my old
 computer which is in a terrible state because I did nothing on it since
 I use the new one. Without X, most work I do on my computer cannot be done.

 Nouveau did not work after I bought my Fujitsu in January. Installing
 xserver-xorg-video-nouveau, xserver-xorg-video-nouveau-dbg,
 libdrm-nouveau1a, and libdrm-nouveau1a-dbg and changing the Driver line
 in Section Device of /etc/X11/xorg.conf with Vim from NVIDIA to
 nouveau and after another reboot to NOUVEAU did not work either. The
 Identifier line was NVIDIA GeForce 9300 GE and thus correct, the other
 sections in xorg.conf were not printed but configured elsewhere, and xdm
 and xfce4 had worked well all the time.

 I rechanged the Driver line with Vim again back to NVIDIA, rebootet
 and dpkg-reconfigured whatever seemed necessary, And rebootet again.
 Near the end of /var/log/Xorg.0.log the following lines showed up:
 (II) Loading extension DRI2
 (II) LoadModule: nvidia
 (WW) Warning: couldn't open module nvidia
 (II) Unloading module nvidia
 (EE) Failed to load module nvidia
 These seem to be the important lines and are the same in Xorg.0.log and
 in Xorg.0.log.old. The logs with nouveau are lost. I rebootet to often
 and there is only one Xorg.0.log.old file. As far as I remember those
 lines did not look notably different from the nvidia ones.

 Is there something I can do, or is it necessary to install Wheezy anew?
 In this case I hope it is enough to repartition / and /boot partitions
 and leave the other ones as they are.

 Yours
 Hans Vogelsberger


 Hans,
    Try reinstalling the nvidia driver, the kernel likely changed during
 your upgrade and the driver needs to have his kernel module recompiled
 against the new kernel version. Try that and report back.

That's not the problem at my end.  I had nvidia-kernel-dkms installed,
which automatically takes care of that.  I haven't had to recompile
the driver on a kernel upgrade for months.

Patrick


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Re: NVIDIA - URGENT

2011-07-02 Thread Sven Joachim
On 2011-07-02 19:08 +0200, Patrick Wiseman wrote:

 That's not the problem at my end.  I had nvidia-kernel-dkms installed,
 which automatically takes care of that.  I haven't had to recompile
 the driver on a kernel upgrade for months.

I think the problem is the new multiarch path of libGL.so.1¹.  The
nvidia packages divert this file and replace it with their own version,
and the versions in testing have not been adapted to the new filesystem
layout yet.  Actually they are uninstallable, because libgl1-mesa-glx
breaks libgl1-nvidia-alternatives (= 275.09.07-1), the version in
wheezy.

Sven


¹ http://blog.mraw.org/2011/06/18/mesa_a_disturbance_in_the_Force/


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Re: NVIDIA - URGENT

2011-07-02 Thread Sven Joachim
On 2011-07-02 18:44 +0200, Hans Vogelsberger wrote:

 Todays testing update, safe-upgrade and full-upgrade totally killed my
 X which ran with NVIDIA driver. Even this posting I must send from my
 old computer which is in a terrible state because I did nothing on it
 since I use the new one. Without X, most work I do on my computer
 cannot be done.

This should serve as a warning to closely look out which packages are to
be removed by a full-upgrade and back out if necessary.

 Nouveau did not work after I bought my Fujitsu in January. Installing
 xserver-xorg-video-nouveau, xserver-xorg-video-nouveau-dbg,
 libdrm-nouveau1a, and libdrm-nouveau1a-dbg and changing the Driver
 line in Section Device of /etc/X11/xorg.conf with Vim from NVIDIA
 to nouveau and after another reboot to NOUVEAU did not work
 either. The Identifier line was NVIDIA GeForce 9300 GE and thus
 correct, the other sections in xorg.conf were not printed but
 configured elsewhere, and xdm and xfce4 had worked well all the time.

 I rechanged the Driver line with Vim again back to NVIDIA, rebootet
 and dpkg-reconfigured whatever seemed necessary, And rebootet
 again. Near the end of /var/log/Xorg.0.log the following lines showed
 up:
 (II) Loading extension DRI2
 (II) LoadModule: nvidia
 (WW) Warning: couldn't open module nvidia
 (II) Unloading module nvidia
 (EE) Failed to load module nvidia
 These seem to be the important lines and are the same in Xorg.0.log
 and in Xorg.0.log.old. The logs with nouveau are lost. I rebootet to
 often and there is only one Xorg.0.log.old file. As far as I remember
 those lines did not look notably different from the nvidia ones.

 Is there something I can do, or is it necessary to install Wheezy anew?

Douglas Adams has some advice for you: DON'T PANIC.  Your system is
almost certainly not broken beyond repair and does not need to be
reinstalled.

Install the xserver-xorg-video-fbdev and xserver-xorg-video-vesa
packages if they are not installed already, move your /etc/X11/xorg.conf
aside and retry to start X.

The nvidia packages will not be installable for a few days,
unfortunately.

Sven



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Re: NVIDIA - URGENT

2011-07-02 Thread David Baron
On Saturday 30 Sivan 5771 21:00:28 debian-user-digest-requ...@lists.debian.org 
wrote:
  That's not the problem at my end.  I had nvidia-kernel-dkms installed,
  which automatically takes care of that.  I haven't had to recompile
  the driver on a kernel upgrade for months.
 
 I think the problem is the new multiarch path of libGL.so.1¹.  The
 nvidia packages divert this file and replace it with their own version,
 and the versions in testing have not been adapted to the new filesystem
 layout yet.  Actually they are uninstallable, because libgl1-mesa-glx
 breaks libgl1-nvidia-alternatives (= 275.09.07-1), the version in
 wheezy.

I know this is playing with fire but I did this:
sudo ln -s /etc/alternatives/libGL.so.1 /usr/lib/i386-linux-gnu/libGL.so.1

This points the multiarch version to where the /usr/lib version points. Save 
the original symlink to libGL.so.1.2 to be safe but easy enough to restore is 
need be. You might also manually point the nvidia/diversion to that one.

Anyway, I had X and NVidia driver working fine but openGL apps crashed out.
After this symlink, flightgear started fine so it fixed my problem in any 
event. Nouveau might not find libGL at all right now.

This multiarch business may be a good idea, but partial upgrades to Sid can 
cause havoc as did recent upgrades to libc6 stuff on my box. Please finish it 
and then post the upgrades :-)


RE: NVIDIA - URGENT

2011-07-02 Thread Hans Vogelsberger

On Sat, Jul 2, I wrote:
 Todays testing update, safe-upgrade and full-upgrade totally killed my X.

After that, I went to the TV and saw some news. When I returned to the 
computer, I already found important answers:


Chris Brennan:
 Try reinstalling the nvidia driver, the kernel likely changed during
 your upgrade and the driver needs to have his kernel module recompi- 
 led against the new kernel version. Try that and report back.


I aptitude-searched nvidia and tried to reinstall nvidia-kernel-2.6-
amd64; answer: not found (right now it no longer shows up in aptitude
search nvidia). Then, because there was a line nvidia-kernel-2.6.32-5- 
amd64, I tried to install nvidia-kernel-2.6.39-2-amd64, my actual uname 
kernel. I should have known better: not found.


Patrick Wiseman:
 I just had exactly the same problem.  nvidia-glx ... breaks every- 
 thing ... . Using aptitude, I manually removed all of the nvidia 
  packages ... , installed xorg-video-nouveau (although I'd rather use 
 the proprietary driver), moved /etc/X11/xorg.conf ... , after all of
 which 'startx' finally worked.  ... albeit with the nouveau driver. 
 Who knows?  Maybe it will turn out to be OK.


Since purging the packages by hand which had an 'i' in aptitude search 
nvidia seemed less work than trying to reinstall them, I now tried the 
method of Patrick - with one difference: instead of moving 
/etc/X11/xorg.conf, I again changed its driver line in section device 
to nouveau - and SUCCEDED: After a reboot xdm started X normally, not 
even startx was necessary. So, my problem was solved, and what is 
especially important: extremely fast, and solely by help from 
debian-users-list.	The main mistake I made before asking for help was 
not to remove the nvidia files.


Sven Joachim:
 I think the problem is the new multiarch path of libGL.so.1¹.  The
 nvidia packages divert this file and replace it with their own ver- 
 sion, and the versions in testing have not been adapted to the new 
 filesystem layout yet.  Actually they are uninstallable, because 
 libgl1-mesa-glx breaks libgl1-nvidia-alternatives (= 275.09.07-1),

 the version in wheezy.

Looks plausible.

 This should serve as a warning to closely look out which packages are 
 to be removed by a full-upgrade and back out if necessary.


You are right. I use Testing since it came up in Potato times, and this 
is the third time that an upgrade made real difficulties. All of those 
were with X. I am afraid by now I am much too audacious. Since I reti-

red 20 years ago I increasingly solved my problems by instinct and
feeling instead of by knowledge and learning, a behaviour which I never 
allowed my pupils and teachers while in work.


 DON'T PANIC.

You are right again, but while writing those thoughts down the panic 
vanished. Anyhow, a new install of wheezy with partitions remaining

unchanged seems an attractiv experiment, but for this, I am afraid,
my audacity is not strong enough.

 Install the xserver-xorg-video-fbdev and xserver-xorg-video-vesa
 packages if they are not installed already, ...

Both are installed, but there is something in /usr/share/bug which I
shall read tomorrow.

 The nvidia packages will not be installable for a few days,
 unfortunately.

Thank you, Chris, Patrick and Sven, for your fast and important answers. 
And, please, do excuse the talkativeness of an old man.


Yours
Hans.

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