Obviously this bug is not really usable as an actual bug, but I am almost certainly encountering the original bug filer's issue so I'll document it here in part because I can no longer gather data about the crash myself. machine: core i5 3570k on a z77 motherboard - hd4000 graphics only. (asus p8z77 lx)
I experience the complete lockup with no kernel logs and no error's apparent in the i915 error_state locations. No keyboard or mouse function, no ability to login ssh. CPU fan spins up to what I think of as it's 'default' state. Reset switch takes much longer to function than usual (10s). Image frozen on screen. Oddly I originally installed ubuntu 12.04 I did not encounter this bug at all. At a distinct point after upgrading packages (which included a kernel security fix) I abruptly began to crash usually within minutes of boot. I disabled automatic x startup and the problem went away. After reading this bug I installed a 3.4 kernel and started running x again with no issues. This machine is actually a server to be deployed to a colo, so I eventually decided to go back to the standard kernel and simply not use x in order to regain the ability to do 'standard' kernel upgrades and use ksplice. A week later and after various non kernel updates I eventually tried to run x again in order to gather some data to file my own bug report, but oddly the system is much more stable now and I've only encountered one system crash in a couple days of trying to reproduce the crash. Thus my own experience seems to indicate that there is some sort of triggering package (presumably in x) which has been revised a number of times since 12.04 was released. The triggering behavior has probably not been present during the entire duration. Whatever that behavior is, it is probably entirely valid and is simply exercising a portion of the standard 3.2 kernel which was not sufficiently tested (presumably somewhere inside the intel kernel level drivers). -- 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/993187 Title: ubuntu 12.04 completely freezes frequently. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/993187/+subscriptions _______________________________________________ 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
