Public bug reported:
OS : Kubunutu 9.04 beta, fully update to date as of 4th of April, 2009.
Hardware : Intel iCore7 + ATI Radeon HD 4670, fglrx drivers installed.
How to recreate bug: Open SystemSettings, select Desktop icon, on
Configure desktop effects tab click "Enable desktop effects" toggle
button, then click on Apply.
Symptoms: On enabling the desktop effects the screen immediately goes
black, and then either flickers and starts working OK with desktop
effects, or stay black for several to several dozen seconds with
occasional flickers back of original desktop. Pressing escape earlier
enough does sometimes recover the desktop without the effects, leave it
too long and you can't get back to a usable desktop.
In cases where a desktop becomes blacked out and usable I have to do an
Ctrl Atl F4 then log in, manually disable the effect by editing
~/.kde/share/configs/kwinrc to disable desktop effects, and then
shutdown the machine - I haven't yet been able to shutdown X and restart
it despite trying sudo init 3, sudo init 5. This is obviously a bit
advanced a workaround to getting a usable desktop back... If I don't
reset kwinrc by hand and just reboot the desktop remains blacked out on
boot and unusable.
Problem is intermittent, sometimes when I log in it fails all the time,
other times it succeeds in enable desktop effects. If it does succeed
then the desktop starts working great, but on reboot typically the black
+ inaccessible desktop problems return. I've been testing on ATI
hardware for the last three days and during this period the ability to
enable desktop has always been problematic, but the percentage of times
when things work I think has gone up. Failure rate is still well over
50% though.
Prior to beginning testing on ATI hardware I tested Kubuntu 9.04 beta
out on NVidia hardware and desktop effects worked great - Kubuntu/KDE
4.2 when it works is really beautiful and fund desktop to use :-) The
problem looks very much like it's related to ATI drivers in some way.
Robert.
** Affects: kde-systemsettings (Ubuntu)
Importance: Undecided
Status: New
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Enabling desktop effects causes desktop black out, when using ATI fglrx drivers
https://bugs.launchpad.net/bugs/355159
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