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In raring I've found that when directly opening some png files, or
somtimes when an application loads png's the Xorg freezes either
completely, or sometime allows the mouse to move.
In a specific case, opening the attached png with the intel driver will
cause Xorg to freeze but the the cursor will still move, but interaction
is futile. System remains accessable over SSH.
The following log is found in Xorg.0.log
(EE) [mi] EQ overflowing. Additional events will be discarded until existing
events are processed.
(EE)
(EE) Backtrace:
(EE) 0: /usr/bin/X (xorg_backtrace+0x3d) [0x7faf70e8550d]
(EE) 1: /usr/bin/X (mieqEnqueue+0x22b) [0x7faf70e6744b]
(EE) 2: /usr/bin/X (QueuePointerEvents+0x52) [0x7faf70d4f322]
(EE) 3: /usr/lib/xorg/modules/input/evdev_drv.so (0x7faf6ae0e000+0x566f)
[0x7faf6ae1366f]
(EE) 4: /usr/bin/X (0x7faf70ce4000+0x913a8) [0x7faf70d753a8]
(EE) 5: /usr/bin/X (0x7faf70ce4000+0xb9a60) [0x7faf70d9da60]
(EE) 6: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7faf6fde4000+0xfbd0)
[0x7faf6fdf3bd0]
(EE) 7: /lib/x86_64-linux-gnu/libc.so.6 (ioctl+0x7) [0x7faf6eb00747]
(EE) 8: /usr/lib/x86_64-linux-gnu/libdrm.so.2 (drmIoctl+0x34) [0x7faf6fbdb344]
(EE) 9: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7faf6d339000+0x3f178)
[0x7faf6d378178]
(EE) 10: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7faf6d339000+0xd0e18)
[0x7faf6d409e18]
(EE) 11: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7faf6d339000+0xd14e9)
[0x7faf6d40a4e9]
(EE) 12: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7faf6d339000+0xd47f8)
[0x7faf6d40d7f8]
(EE) 13: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7faf6d339000+0x97604)
[0x7faf6d3d0604]
(EE) 14: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7faf6d339000+0xd4b31)
[0x7faf6d40db31]
(EE) 15: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7faf6d339000+0x68a5b)
[0x7faf6d3a1a5b]
(EE) 16: /usr/bin/X (0x7faf70ce4000+0x126ee1) [0x7faf70e0aee1]
(EE) 17: /usr/bin/X (0x7faf70ce4000+0x54cde) [0x7faf70d38cde]
(EE) 18: /usr/bin/X (0x7faf70ce4000+0x4431a) [0x7faf70d2831a]
(EE) 19: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf5)
[0x7faf6ea30ea5]
(EE) 20: /usr/bin/X (0x7faf70ce4000+0x44661) [0x7faf70d28661]
(EE)
(EE) [mi] These backtraces from mieqEnqueue may point to a culprit higher up
the stack.
(EE) [mi] mieq is *NOT* the cause. It is a victim.
(EE) [mi] EQ overflow continuing. 100 events have been dropped.
(EE)
There is no usefull data in dmesg and
$ cat i915_error_state
no error state collected
** Affects: xserver-xorg-video-intel (Ubuntu)
Importance: Undecided
Status: Confirmed
--
[Saucy] Xorg with Intel video freezes when rendering some png files
https://bugs.launchpad.net/bugs/1200766
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