I'm seeing very similar symptoms on my Celeron N2940 sysstem. I'm using Arch distro with kernel 4.2.3-1. The system freezes from time to time when playing videos, especialy when using HW acceleration. It usually happens when playing videos from mpv with VAAPI HW decoding enabled or flash videos in Firefox with HW decoding enabled in flash config file. System freezes usually in 10 to 30 minutes of playback. Playing videos with no HW decoding means less freezes of my system, but not avoiding them. It just happens less frequent and from time to time, even when no videoplayback is running in my LXDE.
My best guess is that this behavior started somewhere between kernel version 4.0.7 and 4.1.6. Unfortunatelly, I can't be more specific, as it took me more than two months stresstesting CPU and memory before I pinpointed this problem as most probably connected with heavy GFX usage. I already tried a few options with no luck, like i915.reset=0/1, i915.enable_rc6=0/1 and i915.semaphores=0/1. I couldn't feel any difference, except with enable_rc6=9. System was even less stable then. Using drm.debug=1 did not produce any intereseting messages before freeze. It's filled with "random" I915_GEM_BUSY, I9!5_GEM_EXECBUFFER2 and I915_GEM_MADVISE messages up to freeze. Of course, I can post the log if someone feels it's interested anyway. I'm willing to offer more help with debuging this issue. -- 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/1453298 Title: Xubuntu freeze once a day To manage notifications about this bug go to: https://bugs.launchpad.net/xserver-xorg-video-intel/+bug/1453298/+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
