From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.7) Gecko/20050416 Red Hat/1.0.3-1.4.1 Firefox/1.0.3 Description of problem: After logging into kde and attempting to change to the "Classic KDE" style from the default Bluecurve style, kde hangs. At times, the hang has impacted either the kcontrol window only, while at others it will hang X. Shortly after (randomly, it seems...), the machine will halt with a kernel panic. The kde and related packages installed include: kdeaddons-3.3.1-2 kdeadmin-3.3.1-2 kdeartwork-3.3.1-2 kdeartwork-icons-3.3.1-2 kdebase-3.3.1-5.5 kdegames-3.3.1-2 kdegraphics-3.3.1-3.3 kdelibs-3.3.1-3.6 kdemultimedia-3.3.1-2 kdenetwork-3.3.1-2 kdenetwork-nowlistening-3.3.1-2 kdepim-3.3.1-2.1 kdesdk-3.3.1-2 kdeutils-3.3.1-2 arts-1.3.1-2 qt-3.3.3-9.3 qt-MySQL-3.3.3-9.3 I have been able to duplicate this problem on two different workstations (a Dell Optiplex 260 and a Dell Optiplex 270). Version-Release number of selected component (if applicable): kdebase-3.3.1-5.5 How reproducible: Always Steps to Reproduce: 1. Log into kde 2. Alt-F2, and start kcontrol 3. Select "Desktop->Styles" (from memory... may not be correct!) 4. Change style from Bluecurve to KDE Classic 5. Press the "Apply" button at the bottom of the kcontrol window. At this point, either the kcontrol window will become unresponsive or the entire X session will freeze (which requires a ctrl-alt-backspace to recover). Almost without fail, the system will hang with a kernel panic within a few minutes. The kernel panic has occurred during a shutdown (following a "reboot" command issued from the console), after logging out of kde and into Gnome, and while working on a virtual console (Ctrl-Alt-F1). Before attempting to change the style, KDE and the system are stable. It is interesting to note that I've used this hardware with Gnome for the better part of two days without trouble. Once, I even quit out of kde after kcontrol became unresponsive, logged into Gnome (so I could work), and then the kernel panic occurred (while in gnome). Actual Results: At this point, either the kcontrol window will become unresponsive or the entire X session will freeze (which requires a ctrl-alt-backspace to recover). Almost without fail, the system will hang with a kernel panic within a few minutes. The kernel panic has occurred during a shutdown (following a "reboot" command issued from the console), after logging out of kde and into Gnome, and while working on a virtual console (Ctrl-Alt-F1). Before attempting to change the style, KDE and the system are stable. It is interesting to note that I've used this hardware with Gnome for the better part of two days without trouble. Once, I even quit out of kde after kcontrol became unresponsive, logged into Gnome (so I could work), and then the kernel panic occurred (while in gnome). Expected Results: Style should have been changed Additional info:
It seems a bug in kernel or X. I'm not able to reproduce this problem. could you please attach the messages from kernel crash? thanks Does the problem appear in gnome if you change the gnome setting with gnome-control-center?
The only message I've seen (when I was logged in on the virtual console -- not in X, where I get no messages) is: kernel panic - not syncing: Attempting to free lock with active block list. I know there are other messages (registers, stack frame, etc), but am not sure how to get to them. How can I capture the crash messages to a file?
Was this bug intentionally closed? If so, should I open a ticket against X? I don't have a resolution.
unfortunatly at the time of a kernel panic, the system isn't in a state where its safe to write files, so the best way of getting the info out of this would probably be netconsole if you've got another computer on the same network. netconsole is pretty easy to set up. On the other box, do.. nc -u -l 4444 and on the box you're seeing this problem, run.. modprobe netconsole netconsole=@/,4444.3.4/ (replace 1.2.3.4 with the IP address of the other box). Now any kernel messages should come out on the terminal of the other box. Can you attach a dmesg & lsmod too please ?
I believe that this was a problem related to the video card and/or X driver. The workstation has recently been replaced, and I can no longer reproduce the problem. This ticket may be closed.