Sorry, that was a horrible paste.
The crash is an out-of-memory situation. In the first call,
XISendDeviceHierarchyEvent() dereferences calloc'd memory without
checking the pointer:
void XISendDeviceHierarchyEvent(int flags[MAXDEVICES])
{
...
ev = calloc(1, sizeof(xXIHierarchyEvent) +
MAXDEVICES * sizeof(xXIHierarchyInfo));
ev->type = GenericEvent;
But as per the backtrace, ev is null at this point:
#0 XISendDeviceHierarchyEvent (flags=0xbfa27e1c) at
../../Xi/xichangehierarchy.c:73
ev = 0x0
We can patch in a check for this which will fix the X crash, but it
doesn't answer the question as to why it is running out of memory to
begin with.
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which is subscribed to xorg-server in ubuntu.
https://bugs.launchpad.net/bugs/720445
Title:
Xorg crashed with SIGSEGV in _start()
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