I started a drag & drop of a folder in Evolution, which reproducibly hangs after a few seconds, leaving the X server locked up with a grab.
I went to the text console and killed -9 the evolution process. Afterwards, I found following errors were in my ~/.xsession-errors log:
[4123:4384:530604721001:ERROR:platform_thread_posix.cc(251)] Not implemented reached in static void base::PlatformThread::SetThreadPriority(base::PlatformThreadHandle, base::ThreadPriority)
[4123:4388:530623650931:ERROR:platform_thread_posix.cc(251)] Not implemented reached in static void base::PlatformThread::SetThreadPriority(base::PlatformThreadHandle, base::ThreadPriority)
[4635:4635:531448181371:ERROR:tab_strip_gtk.cc(1265)] Not implemented reached in virtual void TabStripGtk::StopAllHighlighting()
[4464:4473:531907220991:ERROR:platform_thread_posix.cc(251)] Not implemented reached in static void base::PlatformThread::SetThreadPriority(base::PlatformThreadHandle, base::ThreadPriority)
[4635:4635:532239675354:ERROR:x11_util.cc(1121)] X Error detected: serial 108952718, error_code 10 (BadAccess (attempt to access private resource denied)), request_code 142, minor_code 1 (X_ShmAttach)
[4635:4635:532239675904:ERROR:x11_util.cc(1121)] X Error detected: serial 108952719, error_code 159 (BadShmSeg (invalid shared segment parameter)), request_code 142, minor_code 3 (X_ShmPutImage)
[4635:4635:532239676300:ERROR:x11_util.cc(1121)] X Error detected: serial 108952728, error_code 159 (BadShmSeg (invalid shared segment parameter)), request_code 142, minor_code 2 (X_ShmDetach)
** (gnome-settings-daemon:4292): WARNING **: Sink callback failure
This is Ubuntu Precise running
compiz_ 1:0.9.7. 8-0ubuntu1. 4 5.14.0- 0ubuntu1 xorg_1: 7.6+12ubuntu1.
unity_
xserver-