Recently I installed opensuse11.2 with kde4.3 on a Dell Dimension 2400 - the installation was successful and everything worked fine.
However, at some point I decided to experiment and attempted to enable Desktop Effects in the KDE Desktop Configuration Panel; this immediately made the system unresponsive. I manually shut it down with the power button. When I turned it on again, it got stuck at the green suse splash with the gecko and loading bar (the bar was about halfway). I tried again, this time in failsafe - this worked fine, and I attempted to disable desktop effects. However, the panel wouldn’t let me the checkbox was greyed out - in fact, when I returned to the defaults the system kept them enabled told me that the effects don’t work on my hardware (I more or less gathered that).
At this point, I looked around the forums a bit. I found a similar problem, which suggested I boot into runlevel 3, su, and then run
sax2 -r -m 0=vesa
I did, and accepted the options it presented me (it didn’t work when I tried to change them around to the monitor I actually have with the resolution it actually has - something about this graphics card not supporting them).
However, this didn’t actually fix my problem (namely, not loading the desktop). So, I booted again in fail safe mode and simply created a new user.
Finally, I could log on again without being forced to use fail safe mode. However, now I had a terrible resolution (640 x 860). Running Sax2 as the new user doesn’t fix the problem - it won’t accept the monitor resolution I actually have. I assume this has something to with having accepted Sax2’s earlier proposition, which was in vesa. Now, I tried to run the command again (both in runlevel 3 and in konsole as my new user) like so:
I logged on as my new user in safe mode, copied it to my desktop and then sudo rm’ed xorg.conf from the terminal. The original user is still unusable, but there were only a couple of files on that anyway… I’ll just copy those over.