Version: unknown (using 4.3.5 (KDE 4.3.5), Gentoo)
OS: Linux (i686) release 220.127.116.11
If I have my notebook in the docking station, suspend2ram it, pull it out of the docking station and wake it up (or doing the similar in the opposite direction) - the screen is either black or nearly all of the screen is black except the mouse courser and sometimes a previously opened Konsole is now with a minimal geometry seen.
This issue happens only within a KDE4 session with kernel 2.6.32.x but not with 21.6.31.x. If I use a "startx" session or if I log into a straight Xsession with kdm then there's no (big) problem so far.
Here's the bisected kernel commit :
and I feel this is not the usual "kernel should not break user space" issue.
this makes positively no sense to me. what makes you think that kde is in any way to blame or could at least work around the issue?
if it has anything to do with kde at all, then it is most likely either powerdevil changing policies or kwin doing some effects which confuse the driver.
(In reply to comment #1)
> me. what makes you think that kde is in any way to blame
Because it is only within the KDE4 session that I cannot continue the work. If I start X11 from a console with xinit or startx, then there's no issue. If I use kdm only to login into a xinit session - there's no problem too. However startung a regular KDE4 session and the issue exists.
well, as far as i'm concerned, this is a typical case of "yeah, kde triggers *yet another* kernel/driver bug. so what?". you may be able to work around it by tweaking some kde settings, but it is most unlikely that we would add any such workaround to kde itself. please come back if you have something convincing ...
Created attachment 41775 [details]
screen shot of the KDE4 screen after wakeup
A straight X11 sessions (startx) doesn't have a problem to handle suspend/wakeup + change the docking station. I can use kdm to login into a straight X11 session and all is fine.
The screen shot shows the result after wakeup with kernel 2.6.34-rc2, xorg-1.7.6 and intel driver 2.10.0 under KDE4.
Therefore IMO this report should be at least handled as an enhancement request, isn't it ?