X crashes a few seconds to a couple of minutes into a KDE4.2 session, depending on what exactly I do. Just about anything can cause the crash. I have not been able to cause the crash from TWM, even while running a couple of different KDE apps (konqueror and konsole). The steps listed below are guaranteed to cause the crash, but they aren't the only way.
Steps to Reproduce:
1. right-click on desktop, choose "appearance settings"
2. left-click on the plasma theme drop-down
get to change my plasma theme
I suspect this is a problem in my Xorg rather than in KDE, but it seems to only happen in my KDE session, so I'm filing it with KDE stuff.
Created attachment 182393 [details]
Created attachment 182395 [details]
Created attachment 183521 [details]
The backtrace I sent in before was the one dumped to the console. This is a full backtrace generated by GDB.
Created attachment 183522 [details]
My kernel configuration
Created attachment 183523 [details]
I just tried updating to Xorg 7.4, as well as rolling back to the nvidia-177.82 driver. Neither of those fixed the crash.
There is no crash using the open-source nv driver.
I've experienced the same behavior with other drop-down selection boxes (specifically, the one in the weather applet). If I can provide any additional information that you might find useful, please let me know.
Does this still happen to you? I see you are using nvidia, could you try the latest available nvidia-drivers? Thanks :)