Version: (using KDE 4.2.1)
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
~$:kwin --replace it outputs like in .xsession-error
"kwin: X Error (error: <unknown>[DAMAGE+0], request: XDamageDestroy[DAMAGE+2], resource: 0x2800c23)
kwin: X Error (error: <unknown>[DAMAGE+0], request: XDamageDestroy[DAMAGE+2], resource: 0x2800c40)"
This output may happen without crash of my xsession
About ksmserver, kern.log indicates at the time xsession crash
kernel: [22906.313145] ksmserver: segfault at 8 ip b6756ad2 sp b3732750 error 4 in libQtCore.so.4.5.0[b66c0000+238000]
else .xsession-error indicates as well
plasma(4966) WirelessInterfaceItem::setConnectionInfo: FIXME: tjkActive connections is empty while connected?
got some strange "QCoreApplication::postEvent: Unexpected null receiver
" in my .xsession-error
a file "_usr_bin_ksmserver.1000.crash"
in my /var/crash/ directory matching with the time of crash
I would be glad to provide any more information someone may need to help !
What's your graphics card vendor and driver?
01:00.0 VGA compatible controller : ATI Technologies Inc M22 [Mobility Radeon X300] [1002:5460]
:~$ lspci -vvnn | grep radeon
Kernel modules: radeonfb
lsmod | grep radeon
radeon 342432 2
drm 96424 3 radeon
apt-cache policy xserver-xorg-video-ati
*** 1:6.12.1-0ubuntu1 0
500 http://fr.archive.ubuntu.com jaunty/main Packages
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