Version: (using KDE 4.2.1) OS: Linux Installed from: Ubuntu Packages well I may experience sometimes a screen freeze [black screen with a working-like system] and can't do anything to remedy that except hard reboot. Sometimes, Xserver crashes but I'm sent back to the login page and I can login, so hard reboot not necesary. Now I'm trying to remedy that bug. Which could come from ksmserver, Plasma, Qtcore or ACPI. now when I try in konsole ~$:kwin --replace it outputs like in .xsession-error "kwin: X Error (error: <unknown>[DAMAGE+0], request: XDamageDestroy[DAMAGE+2], resource: 0x2800c23) kwin: X Error (error: <unknown>[DAMAGE+0], request: XDamageDestroy[DAMAGE+2], resource: 0x2800c40)" This output may happen without crash of my xsession About ksmserver, kern.log indicates at the time xsession crash kernel: [22906.313145] ksmserver[3197]: segfault at 8 ip b6756ad2 sp b3732750 error 4 in libQtCore.so.4.5.0[b66c0000+238000] else .xsession-error indicates as well plasma(4966) WirelessInterfaceItem::setConnectionInfo: FIXME: tjkActive connections is empty while connected? got some strange "QCoreApplication::postEvent: Unexpected null receiver " in my .xsession-error a file "_usr_bin_ksmserver.1000.crash" in my /var/crash/ directory matching with the time of crash I would be glad to provide any more information someone may need to help !
What's your graphics card vendor and driver?
01:00.0 VGA compatible controller [0300]: ATI Technologies Inc M22 [Mobility Radeon X300] [1002:5460] :~$ lspci -vvnn | grep radeon Kernel modules: radeonfb lsmod | grep radeon radeon 342432 2 drm 96424 3 radeon apt-cache policy xserver-xorg-video-ati xserver-xorg-video-ati: Installed: 1:6.12.1-0ubuntu1 Candidate: 1:6.12.1-0ubuntu1 Version table: *** 1:6.12.1-0ubuntu1 0 500 http://fr.archive.ubuntu.com jaunty/main Packages 100 /var/lib/dpkg/status
Well, I disabled yesterday dektop effects. It seems that kwin is definitely the origin of my troubles as the xserver does not crash anymore. Someone could tell me what I should Check so as to resolve this and get back the desktop effects without any xserver failure?
I have heard of some people having problems with Ati drivers and Jaunty. Perhaps your problem is related to the fact that you are using unstable software? In any case I think it would be better to report this problem to Ubuntu developers as - I think - you did not experience the X crashes with stable Ubuntu release.
kwin is not the source of your problems. It's the graphics driver which can be seen by the fact that your X server crashes (if X crashes it's X that has a problem). Performance problems related to ATI driver are named in the Kubuntu release note with some hints how to get rid of them: http://www.kubuntu.org/news/9.04-release