This page is part of the debugging series — pages with debugging details for a variety of Ubuntu packages.
This page lists some helpful steps when filing an ltsp bug
- It is very helpful if you include version numbers of the ltsp (or ltspfs) packages in your bug report (see below how to get the right version numbers for the various packages).
- If you modified any defaults in your thin client chroot, please mention this.
- Did you change anything in your lts.conf file (until gutsy in /opt/ltsp/i386/etc/, later in /var/lib/tftpboot/ltsp/i386/), if so, please attach it.
- Architecture: x86 or amd64
- Please tell how to reproduce the bug.
See also: HelpingWithBugs
Get the versions of the packages:
dpkg -l ltsp-server dpkg -l ltsp-server-standalone dpkg -l --root=/opt/ltsp/i386 ldm dpkg -l --root=/opt/ltsp/i386 ltsp-client dpkg -l --root=/opt/ltsp/i386 ltsp-client-core # gutsy only
Is your bug related to local devices:
dpkg -l ltspfs dpkg -l --root=/opt/ltsp/i386 ltspfsd
Debugging speed problems
These tools you could use to monitor some speed problems, so you could find the bottlenecks:
xrestop (http://freedesktop.org/wiki/Software/xrestop) (aptitude install xrestop); Gives a top like interface on the processes which uses the most X-resources
Cacti with snmpd (http://www.cacti.net/) (aptitude install cacti snmpd snmp); For monitoring system and network usage. Needs some work to setup
Munin (http://munin.projects.linpro.no/) (aptitude install munin); Also for monitoring system and network usage. Easy to setup.
ntop(http://www.ntop.org/) (aptitude install ntop); For network traffic monitoring.
BootChart (aptitude install bootchart); For monitoring bootup speed. See also: http://www.hamilton.ie/gavinmc/edubuntu/bootchart.html and LtspBootPerformance
See also: DebuggingProcedures
These things you need to check if they are working correctly on your system:
Video drivers on the server (are they installed correctly?). You can check that via the /var/log/Xorg.0.log if the drivers are loaded correctly. Search for (WW), (EE) and (!!). The command cat /var/log/Xorg.0.log | egrep '(\(EE\)|\(WW\)|\(!!\))' should help you filter it.
- Video drivers on the client. Same as for the server, but now on a running LTSP client.
- Check if disk/file indexing is turned on on the server. This will give some disk usage. Which can slow the system down.
- Memory per client
- Disk usage per client
For locking with sound, you could try to use PulseAudio fully. (in lts.conf: SOUND_DAEMON=pulse)
- Try another Window Manager (like ICEWM). It could be that Gnome is very slow. If that speeds up, you know what might be the problem.
- Check the load average with the command uptime.
Bugs not directly with LTSP, but affect LTSP environments
- Policykit not allowing remote sessions (Both ssh -X that ltsp uses, and NX sessions) to access admin functionality:
gvfs-fuse sessions hanging around: https://bugs.edge.launchpad.net/ubuntu/+source/gvfs/+bug/252796
gconfd-2 hanging around: https://bugs.launchpad.net/ubuntu/+source/gconf2/+bug/269541
Workarounds / Solutions
Workaround: For the ophrane processes, you can install gnome-watchdog (http://logicalnetworking.net/other/gnome-watchdog_0.9.2_i386.deb)