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 > >> > > >> > >> > >> > >> -- > >> Agnes-Bernauer-Strasse 53b > >> 80687 Muenchen > >> > >> Mobile: +49-176-61576306 > >> > >> ------------------------------------------------------------------------------ > >> 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
