This bug appears to involve a freeze of Xorg, probably due to a GPU lockup in the kernel drm code, in a version of Ubuntu before natty (or we couldn't determine the version from the report).
The X team has been investigating GPU lockups in Intel's video driver during the natty development cycle. Many of these issues are now either resolved or at least well understood. There are also better tools for capturing and diagnosing these problems, but these tools are either unavailable or incomplete in older versions of ubuntu, so debugging this issue on pre-natty versions is unlikely to be productive. We're closing out the bug report for this reason. However, you may not yet be ready to upgrade to natty. It turned out that a large number of these freezes were solved by updates to the kernel. Thus, updating your kernel may be a workaround for you. Updated kernel packages are available a variety of places, such as: http://kernel.ubuntu.com/~kernel-ppa/mainline/ If you find a newer kernel fixes it, and think the fix should be backported to earlier Ubuntu versions, please file a request against the linux kernel in Ubuntu, indicating the broken and the fixed kernel versions. If it does not fix it, and you do not wish to upgrade to natty, please follow up through technical support channels (e.g. http://askubuntu.com is a good place for free support for older Ubuntu versions). On the other hand, if you find after upgrading to natty and updating to latest that you still experience GPU lockups, please reproduce the problem, ssh into the frozen machine, and collect the file /sys/kernel/debug/dri/0/i915_error_state and the output of 'dmesg > dmesg.txt', and attach both to a new bug report. ** Changed in: xserver-xorg-video-intel (Ubuntu) Status: Confirmed => Invalid -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/569857 Title: System freeze when plug a VGA cable to display device _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
