Provided that it is likely that people in this forum are affected by different bugs, I will share my own experience. I have been using in the last weeks kernel 3.4.1 (available at http://kernel.ubuntu.com/~kernel-ppa/mainline/) on a Dell Vostro V131 with Sandy Bridge and HD 3000. With the following default kernel parameters (/etc/default/grub): 1) quiet splash pcie_aspm=force i915.i915_enable_rc6=1 the system hangs (no mouse movements, no SysRq, no shh) within ~12 hours of operation. Changing to: 2) quiet splash pcie_aspm=force i915.i915_enable_rc6=1 i915.i915_enable_fbc=0 the system hangs within ~12 hours of operation. Changing to: 3) quiet splash pcie_aspm=force i915.i915_enable_rc6=0 i915.i915_enable_fbc=0 The system does not hang anymore even after several days of operation. It does seem like the combination of i915.i915_enable_rc6=0 and i915.i915_enable_fbc=0 completely fixes the issue for me.
Here is the current output of "for file in /sys/module/i915/parameters/*; do echo -en $file"\t"; sudo cat $file; done": /sys/module/i915/parameters/enable_hangcheck Y /sys/module/i915/parameters/fbpercrtc 0 /sys/module/i915/parameters/i915_enable_fbc 0 /sys/module/i915/parameters/i915_enable_ppgtt -1 /sys/module/i915/parameters/i915_enable_rc6 0 /sys/module/i915/parameters/lvds_downclock 0 /sys/module/i915/parameters/lvds_use_ssc -1 /sys/module/i915/parameters/modeset -1 /sys/module/i915/parameters/panel_ignore_lid 0 /sys/module/i915/parameters/powersave 1 /sys/module/i915/parameters/reset Y /sys/module/i915/parameters/semaphores -1 /sys/module/i915/parameters/vbt_sdvo_panel_type -1 It seems a plausible explanation is that there is something from the i915 driver triggering a GPU hang not correctly resolved. Could it be that this has to do with overheating and so it cannot be boiled down to a specific piece of code? I would be curios to see and hear if other people get it fixed with the same kernel parameters. -- 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
