Created attachment 119298 [details] Xorg log After upgrading from Ubuntu 15.04 to 15.10 graphical system works visually slower and sandomly X server crashes giving error: [ 23266.388] (EE) Fatal server error: [ 23266.394] (EE) TouchListenerGone: couldn't allocate events [ 23266.394] (EE) [ 23266.394] (EE) Please consult the The X.Org Foundation support at http://wiki.x.org for help. [ 23266.411] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information. [ 23266.411] (EE) [ 23266.467] (II) AIGLX: Suspending AIGLX clients for VT switch [ 23266.497] (EE) Server terminated with error (1). Closing log file. Probably caused by i915 driver. Two systems currently known to be affected by this bug: a) desktop on Intel Xeon E3-1200 v3/4th b) notebook on Intel Core i3 CPU M380 both having integrated Intel graphic cards (into CPU's), both using i915 driver.
Probably this crash is the same cause: [ 69738.421] (EE) intel(0): When reporting this, please include /sys/class/drm/card0/error and the full dmesg. [ 69738.721] (EE) [ 69738.721] (EE) Backtrace: [ 69738.816] (EE) 0: /usr/bin/X (xorg_backtrace+0x4e) [0x5584f565662e] [ 69738.816] (EE) 1: /usr/bin/X (0x5584f54a2000+0x1b8999) [0x5584f565a999] [ 69738.816] (EE) 2: /lib/x86_64-linux-gnu/libc.so.6 (0x7f4086863000+0x352f0) [0x7f40868982f0] [ 69738.816] (EE) 3: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f4082c3a000+0x1046cb) [0x7f4082d3e6cb] [ 69738.816] (EE) 4: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7f4082c3a000+0x10749b) [0x7f4082d4149b] [ 69738.816] (EE) 5: /usr/bin/X (DRI2SwapBuffers+0x1c8) [0x5584f5628cf8] [ 69738.816] (EE) 6: /usr/bin/X (0x5584f54a2000+0x18867c) [0x5584f562a67c] [ 69738.816] (EE) 7: /usr/bin/X (0x5584f54a2000+0x5818f) [0x5584f54fa18f] [ 69738.816] (EE) 8: /usr/bin/X (0x5584f54a2000+0x5c34b) [0x5584f54fe34b] [ 69738.817] (EE) 9: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf0) [0x7f4086883a40] [ 69738.817] (EE) 10: /usr/bin/X (_start+0x29) [0x5584f54e86c9] [ 69738.817] (EE) [ 69738.817] (EE) Segmentation fault at address 0x10 [ 69738.817] (EE) Fatal server error: [ 69738.817] (EE) Caught signal 11 (Segmentation fault). Server aborting Maybe not. /sys/class/drm/card0/error contain "no error state collected" and dmesg give me nothing interesting.
More automatically collected by Apport system info can be inspected here: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1511819
I presume mea culpa, commit 2d26643cab33a32847afaf13b50d326d09d58bf7 Author: Chris Wilson <chris@chris-wilson.co.uk> Date: Fri Nov 13 19:03:36 2015 +0000 sna/dri2: Drop the reference on the fence when complet
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