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[Bug 1529932] Re: X session crashes with EQ overflowing

To: desktop-packages@xxxxxxxxxxxxxxxxxxx
From: "Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>
Date: Sun, 10 Jan 2016 16:00:03 -0000
Reply-to: Bug 1529932 <1529932@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
hardhu, thank you for reporting this and helping make Ubuntu better.

Could you please run the following command once from a terminal as it will automatically gather and attach updated debug information to this report:
apport-collect -p xorg 1529932

Please ensure you have the package xdiagnose installed, and that you
click the Yes button for attaching additional debugging information.

When reporting xorg related bugs in the future, please do so via the
above method. You can learn more about this functionality at
https://wiki.ubuntu.com/ReportingBugs.

** Package changed: xorg-server (Ubuntu) => xorg (Ubuntu)

** Changed in: xorg (Ubuntu)
   Importance: Undecided => Low

** Changed in: xorg (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1529932

Title:
  X session crashes with EQ overflowing

Status in xorg package in Ubuntu:
  Incomplete

Bug description:
  On my very old laptop, that is equipped with an Ati Mobility Radeon
  X700, sometimes (and, sadly, I have to use this word, because I found
  no regularity pattern for the occurrence of this bug) randomly the
  desktop session locks, that is I can only move the mouse pointer, but
  I cannot interact anymore with the desktop session. I am forced to
  login trough ssh from another pc and to restart the laptop.

  In Xorg.0.log I found these lines that are, in my opinion, related to
  the crash:

  (EE) [mi] EQ overflowing.  Additional events will be discarded until existing events are processed.
  (EE) 
  (EE) Backtrace:
  (EE) 0: /usr/bin/X (xorg_backtrace+0x4e) [0x5608e56a768e]
  (EE) 1: /usr/bin/X (mieqEnqueue+0x253) [0x5608e5689373]
  (EE) 2: /usr/bin/X (QueuePointerEvents+0x52) [0x5608e5563152]
  (EE) 3: /usr/bin/X (xf86PostMotionEvent+0xd6) [0x5608e559a026]
  (EE) 4: /usr/lib/xorg/modules/input/synaptics_drv.so (0x7f5e497b3000+0x5322) [0x7f5e497b8322]
  (EE) 5: /usr/lib/xorg/modules/input/synaptics_drv.so (0x7f5e497b3000+0x73d2) [0x7f5e497ba3d2]
  (EE) 6: /usr/bin/X (0x5608e54f3000+0x96ac8) [0x5608e5589ac8]
  (EE) 7: /usr/bin/X (0x5608e54f3000+0xbfc92) [0x5608e55b2c92]
  (EE) 8: /lib/x86_64-linux-gnu/libc.so.6 (0x7f5e522c9000+0x352f0) [0x7f5e522fe2f0]
  (EE) 9: /lib/x86_64-linux-gnu/libc.so.6 (ioctl+0x7) [0x7f5e523c60b7]
  (EE) 10: /usr/lib/x86_64-linux-gnu/libdrm.so.2 (drmIoctl+0x28) [0x7f5e536ada08]
  (EE) 11: /usr/lib/x86_64-linux-gnu/libdrm.so.2 (drmCommandWrite+0x1b) [0x7f5e536b06cb]
  (EE) 12: /usr/lib/x86_64-linux-gnu/libdrm_radeon.so.1 (0x7f5e4e3ad000+0x19c9) [0x7f5e4e3ae9c9]
  (EE) 13: /usr/lib/x86_64-linux-gnu/libdrm_radeon.so.1 (0x7f5e4e3ad000+0x1c0c) [0x7f5e4e3aec0c]
  (EE) 14: /usr/lib/xorg/modules/drivers/radeon_drv.so (0x7f5e4e5b9000+0x26236) [0x7f5e4e5df236]
  (EE) 15: /usr/lib/xorg/modules/libexa.so (0x7f5e4d973000+0x569b) [0x7f5e4d97869b]
  (EE) 16: /usr/lib/xorg/modules/libexa.so (0x7f5e4d973000+0x7e8f) [0x7f5e4d97ae8f]
  (EE) 17: /usr/lib/xorg/modules/libexa.so (0x7f5e4d973000+0x11953) [0x7f5e4d984953]
  (EE) 18: /usr/lib/xorg/modules/libexa.so (0x7f5e4d973000+0xe770) [0x7f5e4d981770]
  (EE) 19: /usr/bin/X (0x5608e54f3000+0x13ca51) [0x5608e562fa51]
  (EE) 20: /usr/lib/xorg/modules/libexa.so (0x7f5e4d973000+0xf74f) [0x7f5e4d98274f]
  (EE) 21: /usr/bin/X (0x5608e54f3000+0x1332a2) [0x5608e56262a2]
  (EE) 22: /usr/bin/X (0x5608e54f3000+0x5818f) [0x5608e554b18f]
  (EE) 23: /usr/bin/X (0x5608e54f3000+0x5c34b) [0x5608e554f34b]
  (EE) 24: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf0) [0x7f5e522e9a40]
  (EE) 25: /usr/bin/X (_start+0x29) [0x5608e55396c9]
  (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) 
  (EE) Backtrace:
  (EE) 0: /usr/bin/X (xorg_backtrace+0x4e) [0x5608e56a768e]
  (EE) 1: /usr/bin/X (QueuePointerEvents+0x52) [0x5608e5563152]
  (EE) 2: /usr/bin/X (xf86PostMotionEvent+0xd6) [0x5608e559a026]
  (EE) 3: /usr/lib/xorg/modules/input/synaptics_drv.so (0x7f5e497b3000+0x5322) [0x7f5e497b8322]
  (EE) 4: /usr/lib/xorg/modules/input/synaptics_drv.so (0x7f5e497b3000+0x73d2) [0x7f5e497ba3d2]
  (EE) 5: /usr/bin/X (0x5608e54f3000+0x96ac8) [0x5608e5589ac8]
  (EE) 6: /usr/bin/X (0x5608e54f3000+0xbfc92) [0x5608e55b2c92]
  (EE) 7: /lib/x86_64-linux-gnu/libc.so.6 (0x7f5e522c9000+0x352f0) [0x7f5e522fe2f0]
  (EE) 8: /lib/x86_64-linux-gnu/libc.so.6 (ioctl+0x7) [0x7f5e523c60b7]
  (EE) 9: /usr/lib/x86_64-linux-gnu/libdrm.so.2 (drmIoctl+0x28) [0x7f5e536ada08]
  (EE) 10: /usr/lib/x86_64-linux-gnu/libdrm.so.2 (drmCommandWrite+0x1b) [0x7f5e536b06cb]
  (EE) 11: /usr/lib/x86_64-linux-gnu/libdrm_radeon.so.1 (0x7f5e4e3ad000+0x19c9) [0x7f5e4e3ae9c9]
  (EE) 12: /usr/lib/x86_64-linux-gnu/libdrm_radeon.so.1 (0x7f5e4e3ad000+0x1c0c) [0x7f5e4e3aec0c]
  (EE) 13: /usr/lib/xorg/modules/drivers/radeon_drv.so (0x7f5e4e5b9000+0x26236) [0x7f5e4e5df236]
  (EE) 14: /usr/lib/xorg/modules/libexa.so (0x7f5e4d973000+0x569b) [0x7f5e4d97869b]
  (EE) 15: /usr/lib/xorg/modules/libexa.so (0x7f5e4d973000+0x7e8f) [0x7f5e4d97ae8f]
  (EE) 16: /usr/lib/xorg/modules/libexa.so (0x7f5e4d973000+0x11953) [0x7f5e4d984953]
  (EE) 17: /usr/lib/xorg/modules/libexa.so (0x7f5e4d973000+0xe770) [0x7f5e4d981770]
  (EE) 18: /usr/bin/X (0x5608e54f3000+0x13ca51) [0x5608e562fa51]
  (EE) 19: /usr/lib/xorg/modules/libexa.so (0x7f5e4d973000+0xf74f) [0x7f5e4d98274f]
  (EE) 20: /usr/bin/X (0x5608e54f3000+0x1332a2) [0x5608e56262a2]
  (EE) 21: /usr/bin/X (0x5608e54f3000+0x5818f) [0x5608e554b18f]
  (EE) 22: /usr/bin/X (0x5608e54f3000+0x5c34b) [0x5608e554f34b]
  (EE) 23: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf0) [0x7f5e522e9a40]
  (EE) 24: /usr/bin/X (_start+0x29) [0x5608e55396c9]
  (EE) 
  [   335.003] [mi] Increasing EQ size to 1024 to prevent dropped events.
  [   335.005] [mi] EQ processing has resumed after 151 dropped events.
  [   335.005] [mi] This may be caused my a misbehaving driver monopolizing the server's resources.
  [   377.274] failed to map pixmap: -1

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References

[Bug 1529932] [NEW] X session crashes with EQ overflowing
From: hardhu, 2015-12-29