xrandr gives:
$xrandr
Screen 0: minimum 320 x 200, current 1920 x 1200, maximum 1920 x 1600
LVDS connected 640x480+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
640x480 60.0*+ 59.9
DVI-0 connected 1920x1200+0+0 (normal left inverted right x axis y
axis) 518mm x 324mm
1920x1200 60.0*+
1600x1200 60.0
1680x1050 59.9
1280x1024 75.0 60.0
1440x900 75.0 59.9
1280x800 59.9
1280x720 60.0
1024x768 75.0 60.0
800x600 75.0 60.3
640x480 75.0 59.9
720x400 70.1
So it is LVDS - This is a "laptop display", isn't it? Well, your
settings were kind of successful.
XRANDR_DISABLE = False
XRANDR_OUTPUT_0 = "DVI-0"
XRANDR_OUTPUT_1 = "LVDS --off"
Disables the LVDS. Just what I wanted. But if I add
XRANDR_MODE_0 = 1920x1200
for my terminal the display shows: "No signal, going to sleep." Looks
like some xrandr stuff that doesn't work. No idea yet, what it could
be. Without XRANDR_MODE_0 = 1920x1200 ldm starts with 640x480.
Cheers
Peter
2009/8/12 Gideon Romm <[email protected]>:
> Peter-
>
> Do this:
>
> 1. Log in from the thin client, open a terminal window, and type: xrandr
> 2. Take a look at the names of the outputs (ie. "VGA", "TMDS-1", "TV",
> etc)
> 3. Then, figure out which of the outputs is the one that is producing
> the 640x480, and we will turn it off. Here's how:
>
> Let's say, "VGA" is the one we want on, and "TV" is the one we want off.
> You should be able to have in lts.conf:
>
> XRANDR_DISABLE = False
> XRANDR_OUTPUT_0 = "VGA"
> XRANDR_OUTPUT_1 = "TV --off"
>
> That *should* disable the unwanted output. If you want to force a
> resolution on the active output, you can add:
>
> XRANDR_MODE_0 = 1920x1200
>
> Some drivers will activate outputs through xrandr incorrectly. These
> steps should hopefully rectify it.
>
> -Gadi
>
> On Wed, 2009-08-12 at 15:19 +0200, Peter Stein wrote:
>> Sometimes those machines are just mysterious. Well, LDM_DIRECTX really
>> reduces ssh's CPU usage to zero. But still Maple was unusable. I
>> checked the gnome display settings and found a second display that was
>> activated with 640x480 that was right in the "real display". How come?
>> No idea.
>> Here's my lts.conf:
>>
>> [default]
>> LDM_DIRECTX = True
>> NETWORK_COMPRESSION = False
>> XRANDR_DISABLE = "True"
>> CONFIGURE_X = "True"
>> USE_XFS = "True"
>> XFS_SERVER = "10.153.106.228"
>> SYSLOG_HOST = "10.153.106.236"
>> [S500-6]
>> X_MODE_0 = "1920x1200"
>>
>> If xrandr is not disabled ldm comes up with 640x480.
>> I deactivated the second display manually in display settings and CPU
>> usage of xorg was reduced massively. Now Maple is at least usable,
>> still lagging a bit, but much better. How can I disable the second
>> display for all users or better get rid of it? Does xrandr work for
>> you with the correct screen resolution?
>>
>>
>> Peter
>>
>>
>>
>> 2009/8/12 Frank Bergmann <[email protected]>:
>> > Java should work quicker via NX-Connection.
>> > So you could install the freenx Server on your sever and a fat client
>> > that boots a small desktop und autostarts the nomachine client.
>> > Maybe you should test this first: Boot a client from cd, install
>> > nomachine client and see how it goes.
>> > Frank
>> >
>> > 2009/8/12 Peter Stein <[email protected]>
>> >>
>> >> Compiz is disabled. LDM_DIRECTX didn't help. Video drivers are ok, I
>> >> use the free radeon drivers, they are well tested.
>> >> How should I install such software as Maple, Mathematica locally ...
>> >> This software needs some kind of computer power. The programs are
>> >> huge. That's why we have our workstations and not a thin client.
>> >> Unfortunately this doesn't look like a good plan. So what is left?
>> >>
>> >> 2009/8/11 Gideon Romm <[email protected]>:
>> >> > Peter,
>> >> >
>> >> > You have several options available:
>> >> >
>> >> > 1. LDM_DIRECTX (set to True in lts.conf, video will not be tunneled
>> >> > through ssh and go back to the client directly)
>> >> >
>> >> > 2. LOCAL_APPS - install java and java programs in the chroot and run
>> >> > them as local apps rather than from the server - do the same with ff and
>> >> > plugins
>> >> >
>> >> > 3. See if you have the optimal video drivers for the thin client
>> >> >
>> >> > 4. Disable compiz if it is running on the server
>> >> >
>> >> > These are off the top of my head.
>> >> >
>> >> > -Gadi
>> >> >
>> >> >
>> >> > On Tue, 2009-08-11 at 18:34 +0200, Peter Stein wrote:
>> >> >> Dear LTSP users,
>> >> >>
>> >> >> when it comes to convince somebody of LTSP the usability and feeling
>> >> >> is crucial. After setting the chroot up we started testing. And here
>> >> >> the real problems begin. Our users are scientists, they work for hours
>> >> >> in front of their monitor and they are *sorry* pissed if the computer
>> >> >> is somewhat sluggish or unusable.
>> >> >> We have enormous problems using Java programs like xmaple and others.
>> >> >> Some are usable, some not. I am aware of the bug here
>> >> >> https://bugs.launchpad.net/ubuntu/+source/ia32-libs/+bug/277069 and
>> >> >> installed the libxcb package of Ubuntu karmic which improved the speed
>> >> >> a lot. But still it sucks to work with thin clients somehow.
>> >> >>
>> >> >> - moving windows is sometimes decelerated
>> >> >> - firefox dropdown menus still open slowly sometimes (not in konqueror)
>> >> >> - input in some java programs like xmaple lags - the program is not
>> >> >> usable
>> >> >> - videos are not shown with enough fps
>> >> >>
>> >> >> I have analyzed the traffic a little bit. If you move a window like
>> >> >> gnome-terminal traffic jumps to 5-6 MB/s sometimes. CPU of xorg goes
>> >> >> up to 45%, ssh uses 20%. If one uses xmaple or other Java programs
>> >> >> load goes up to 1.15 which is too much for a single core terminal,
>> >> >> traffic jumps to 14-15 MB. This is more than maximum for a 100 MBit/s
>> >> >> connection, which is still kind of standard (but tested with GBit/s).
>> >> >>
>> >> >> We use:
>> >> >> Ubuntu Jaunty for servers and chroot
>> >> >> terminals have sempron 2100+ (that's not really slow for a terminal)
>> >> >> ATI X1200 with free radeon driver
>> >> >> the server I used for testing has more than enough power: 8 cores and
>> >> >> 16GB RAM
>> >> >>
>> >> >> I also tried hpn-ssh http://www.psc.edu/networking/projects/hpn-ssh/
>> >> >> with no sufficient result.
>> >> >> So the problem is:
>> >> >>
>> >> >> In many cases (like moving a window etc.) xorg and ssh use too much
>> >> >> cpu. We changed ssh encryption to blowfish which helped only a little.
>> >> >> What can I do to improve this situation. I ran out of ideas. One
>> >> >> important program which doesn't work, is enough to make this project
>> >> >> rubbish. All my work was for nothing and that would be very
>> >> >> disappointing.
>> >> >>
>> >> >> Thank you very much.
>> >> >>
>> >> >>
>> >> >>
>> >> >> Peter
>> >> >>
>> >> >> ------------------------------------------------------------------------------
>> >> >> Let Crystal Reports handle the reporting - Free Crystal Reports 2008
>> >> >> 30-Day
>> >> >> trial. Simplify your report design, integration and deployment - and
>> >> >> focus on
>> >> >> what you do best, core application coding. Discover what's new with
>> >> >> Crystal Reports now. http://p.sf.net/sfu/bobj-july
>> >> >> _____________________________________________________________________
>> >> >> Ltsp-discuss mailing list. To un-subscribe, or change prefs, goto:
>> >> >> https://lists.sourceforge.net/lists/listinfo/ltsp-discuss
>> >> >> For additional LTSP help, try #ltsp channel on irc.freenode.net
>> >> > --
>> >> > --------------------------------------------------------
>> >> > Gideon Romm | Proud LTSP Developer
>> >> > [email protected]
>> >> >
>> >> > Support LTSP! Buy your hardware at:
>> >> >
>> >> > www.DisklessWorkstations.com
>> >> > www.DisklessThinClients.com
>> >> >
>> >> > (use coupon code: LTSP5P for 5% off thin clients from
>> >> > DisklessThinClients.com)
>> >> >
>> >> >
>> >> > ------------------------------------------------------------------------------
>> >> > Let Crystal Reports handle the reporting - Free Crystal Reports 2008
>> >> > 30-Day
>> >> > trial. Simplify your report design, integration and deployment - and
>> >> > focus on
>> >> > what you do best, core application coding. Discover what's new with
>> >> > Crystal Reports now. http://p.sf.net/sfu/bobj-july
>> >> > _____________________________________________________________________
>> >> > Ltsp-discuss mailing list. To un-subscribe, or change prefs, goto:
>> >> > https://lists.sourceforge.net/lists/listinfo/ltsp-discuss
>> >> > For additional LTSP help, try #ltsp channel on irc.freenode.net
>> >> >
>> >>
>> >>
>> >>
>> >> --
>> >>
>> >> ------------------------------------------------------------------------------
>> >> Let Crystal Reports handle the reporting - Free Crystal Reports 2008
>> >> 30-Day
>> >> trial. Simplify your report design, integration and deployment - and
>> >> focus on
>> >> what you do best, core application coding. Discover what's new with
>> >> Crystal Reports now. http://p.sf.net/sfu/bobj-july
>> >> _____________________________________________________________________
>> >> Ltsp-discuss mailing list. To un-subscribe, or change prefs, goto:
>> >> https://lists.sourceforge.net/lists/listinfo/ltsp-discuss
>> >> For additional LTSP help, try #ltsp channel on irc.freenode.net
>> >
>> > ------------------------------------------------------------------------------
>> > Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day
>> > trial. Simplify your report design, integration and deployment - and focus
>> > on
>> > what you do best, core application coding. Discover what's new with
>> > Crystal Reports now. http://p.sf.net/sfu/bobj-july
>> > _____________________________________________________________________
>> > Ltsp-discuss mailing list. To un-subscribe, or change prefs, goto:
>> > https://lists.sourceforge.net/lists/listinfo/ltsp-discuss
>> > For additional LTSP help, try #ltsp channel on irc.freenode.net
>> >
>>
>> ------------------------------------------------------------------------------
>> Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day
>> trial. Simplify your report design, integration and deployment - and focus on
>> what you do best, core application coding. Discover what's new with
>> Crystal Reports now. http://p.sf.net/sfu/bobj-july
>> _____________________________________________________________________
>> Ltsp-discuss mailing list. To un-subscribe, or change prefs, goto:
>> https://lists.sourceforge.net/lists/listinfo/ltsp-discuss
>> For additional LTSP help, try #ltsp channel on irc.freenode.net
> --
> --------------------------------------------------------
> Gideon Romm | Proud LTSP Developer
> [email protected]
>
> Support LTSP! Buy your hardware at:
>
> www.DisklessWorkstations.com
> www.DisklessThinClients.com
>
> (use coupon code: LTSP5P for 5% off thin clients from DisklessThinClients.com)
>
>
> ------------------------------------------------------------------------------
> Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day
> trial. Simplify your report design, integration and deployment - and focus on
> what you do best, core application coding. Discover what's new with
> Crystal Reports now. http://p.sf.net/sfu/bobj-july
> _____________________________________________________________________
> Ltsp-discuss mailing list. To un-subscribe, or change prefs, goto:
> https://lists.sourceforge.net/lists/listinfo/ltsp-discuss
> For additional LTSP help, try #ltsp channel on irc.freenode.net
>
------------------------------------------------------------------------------
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trial. Simplify your report design, integration and deployment - and focus on
what you do best, core application coding. Discover what's new with
Crystal Reports now. http://p.sf.net/sfu/bobj-july
_____________________________________________________________________
Ltsp-discuss mailing list. To un-subscribe, or change prefs, goto:
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