I finally found how to trigger this bug and it's quite strange. I remembered that this bug appeared not the day I did apt-get upgrade but two days later. The last thing I did before this bug appeared was to enable the auto-hide feature of the KDE panel :
right-click on the panel Panel Options -> Panel Settings More Settings... and select Auto-hide However, the panel auto-hide feature is not sufficient to trigger this bug, I realized that I have also to start aMSN Messenger. With aMSN messenger started, if move the pointer to the bottom of the screen several times (where the hidden panel is supposed to be), X will crash. Usually, X will not crash the first time I move the pointer to the bottom of the screen (instead, it will show the panel as it's supposed to do) and it does not take an exact number of pointer moves. But with panel auto-hide feature enabled and with aMSN started, X will crash after 2 to 10 pointer moves to 'unhide' the panel. I didn't count the exact number before each crash but I realized it changes from one time to another. If I enable KDE panel auto-hide but I don't start aMSN, X won't crash (no matter how many times I move the pointer to the bottom of the screen to show the panel). If I disable auto-hide (set the panel to "Always visible") and I start aMSN, X won't crash : maybe the bug was there since Lucid was released, but I didn't notice it because I wasn't using the auto-hide feature. I don't really see the logic here. The only relationship between aMSN and KDE panel that I see is that aMSN adds an icon to the KDE system tray when it starts. I don't think I have other non-KDE applications that adds icons to the systray, so I'm not sure it is related to the systray icon. I use aMSN from the Lucid repository (0.98.3-0ubuntu1) I have not tried yet xorg-edgers PPA. I will run intel_error_decode with several i915_error_state as soon as possible. I tried udevadm monitor --property and I'm sending the output as an attachment. The last thing udevadm showed when X crashed was this block : UDEV [1275752385.489124] change /devices/pci0000:00/0000:00:02.0/drm/card0 (drm) UDEV_LOG=3 ACTION=change DEVPATH=/devices/pci0000:00/0000:00:02.0/drm/card0 SUBSYSTEM=drm ERROR=1 DEVNAME=/dev/dri/card0 DEVTYPE=drm_minor SEQNUM=1786 ACL_MANAGE=1 MAJOR=226 MINOR=0 DEVLINKS=/dev/char/226:0 ** Attachment added: "udevadm monitor --property output" http://launchpadlibrarian.net/49752867/udevlog.2 ** Summary changed: - [i945gm] X crashes randomly (lucid) + [i945gm] lucid: moving pointer over auto-hidden KDE panel and aMSN started crashes X ** Summary changed: - [i945gm] lucid: moving pointer over auto-hidden KDE panel and aMSN started crashes X + [i945gm] lucid: moving pointer over auto-hidden KDE panel when aMSN is started crashes X -- [i945gm] lucid: moving pointer over auto-hidden KDE panel when aMSN is started crashes X https://bugs.launchpad.net/bugs/587708 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
