I had encounter at times (after certain updates/installation) -
unable to use heavy graphics like googleearth and blender. Starting these applications will result in being kicked out of the kde session. This happens across different computers.

Normally when this happens, I just avoid using the affected software.


Just installed KDE4 and encounter the same type of problem.
After login (username and password), kde initiatise and before I can see the desktop, I was kicked out back into the login screen.


Some Info : Debian(experimental), Intel Core2 Dual, 3G ram, Nvidia 7500


Any idea what can be done?

Have you checked your logs for any clues??

Log are too cryptic for my limited knowledge :-(

Managed to solve the issue. Deleted xorg.conf and a reconfiguration of xorg solves the problem.

Thanks for replying anyway :-)

Can you post the changes you made, it might help someone else with the same problem.

Sure!

1. In KDM, choose login in console mode.

2. Move the existing xorg configuration file away.
3. Log into root and reconfigure xorg
enter your password
then answer tons of questions, choose default answer if in doubt

4. Reconfigure your nvidia as usual.
NVIDIA-Linux-x86-169.07-pkg1 is the file that I've download from Nvidia 's website for my specific card, will differ for each of us

5. Reboot


Hope this info is helpful to someone else

Cheers