Re-opening this issue as it is not 100% solved and understood...
The situation is: with extensions XFIXES enabled in nxagent/x2goagent we observe KDE crashes on Ubuntu precise and above. The crashes happen in kwin.
The problem could be tracked down to some problems in libxfixes. The change must have been between libxfixes from oneiric and libxfixes from precise.
On IRC I wrote this about the observed issue:15:48 < sunweaver> siretart: I might have found the libxfixes issue with libxfixes since precise...
15:48 < sunweaver> at least I have several question marks...15:49 < sunweaver> the xserver-xorg src package in precise has a patch named: 500_pointer_barrier_thresholds.diff
15:50 < sunweaver> this patches in xfixes v6 code into the xfixes v5 extension15:51 < sunweaver> in that patch you can also see that the xfixes extension version is also incremented (5 -> 6) 15:52 < sunweaver> the libxfixes 1:5.0-4ubuntu4 and the package x11proto-fixes-dev 1:5.0-2ubuntu1 package also have patches for this improvement: both named
01_fixesproto-v6.diff.
15:54 < sunweaver> However, when looking at a build of libxfixes
5.0-4ubuntu4 I see a config.h file that announces itself with
PACKAGE_VERSION 5.0.
15:55 < sunweaver> So, my current guess is that libxfixes annouces
itself as v5 and also does a xlib-xserver version handshake based on
v5, but then
executes code from libxfixes v6 which then breaks nxagent.
15:55 < sunweaver> Is that possible?
Can anyone comment on this?
Mike
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