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[Bug 477134] Re: X server hard crash when kubuntu System Settings Display app is started

 

Here is the tail of an strace running on the X server process at the time of the crash; notice the unfinished ioctl at the end.
ioctl(7, 0x40046460, 0x7fff5e2381f0)    = 0
ioctl(7, 0x4020645d, 0x7fff5e238120)    = 0
ioctl(7, 0xc0086457, 0x7fff5e2381b0)    = 0
ioctl(7, 0x400c645f, 0x7fff5e2381f0)    = 0
ioctl(7, 0x40046460, 0x7fff5e2381f0)    = 0
ioctl(7, 0xc0086457, 0x7fff5e2381b0)    = 0
ioctl(7, 0x400c645f, 0x7fff5e2381f0)    = 0
ioctl(7, 0x40046460, 0x7fff5e2381f0)    = 0
ioctl(7, 0x4020645d, 0x7fff5e238120)    = 0
ioctl(7, 0xc0086457, 0x7fff5e2381b0)    = 0
ioctl(7, 0x400c645f, 0x7fff5e2381f0)    = 0
ioctl(7, 0x40046460, 0x7fff5e2381f0)    = 0
ioctl(7, 0xc0086457, 0x7fff5e2381b0)    = 0
ioctl(7, 0x400c645f, 0x7fff5e2381f0)    = 0
ioctl(7, 0x40046460, 0x7fff5e2381f0)    = 0
ioctl(7, 0x4020645d, 0x7fff5e238120)    = 0
ioctl(7, 0xc0086457, 0x7fff5e2381b0)    = 0
ioctl(7, 0x400c645f, 0x7fff5e2381f0)    = 0
ioctl(7, 0x40046460, 0x7fff5e2381f0)    = 0
ioctl(7, 0xc0086457, 0x7fff5e2381b0)    = 0
ioctl(7, 0x400c645f, 0x7fff5e2381f0)    = 0
ioctl(7, 0x40046460, 0x7fff5e2381f0)    = 0
ioctl(7, 0x4020645d, 0x7fff5e238120)    = 0
ioctl(7, 0xc0086457, 0x7fff5e2381b0)    = 0
ioctl(7, 0x400c645f, 0x7fff5e2381f0)    = 0
ioctl(7, 0x40046460, 0x7fff5e2381f0)    = 0
ioctl(7, 0xc0086457, 0x7fff5e2381b0)    = 0
ioctl(7, 0x400c645f, 0x7fff5e2381f0)    = 0
ioctl(7, 0x40046460, 0x7fff5e2381f0)    = 0
ioctl(7, 0x4020645d, 0x7fff5e238120)    = 0
writev(28, [{"f\0i\3\272)`\1\302)`\1\4.\31\0\341\0\335\0\207\2X\2\20\1p\0h\4e\3", 32}], 1) = 32
read(26, 0xb509e70, 4096)               = -1 EAGAIN (Resource temporarily unavailable)
setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={0, 0}}, NULL) = 0
ioctl(7, 0x40046460, 0x7fff5e238240)    = 0
ioctl(7, 0x40286454, 0x7fff5e238210)    = 0
ioctl(7, 0xc0086457, 0x7fff5e2381f0)    = 0
ioctl(7, 0x400c645f, 0x7fff5e238230)    = 0
ioctl(7, 0x6458, 0)                     = 0
select(256, [1 3 5 8 9 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 37], NULL, NULL, {0, 20000}) = 1 (in [37], left {0, 19979})
setitimer(ITIMER_REAL, {it_interval={0, 20000}, it_value={0, 20000}}, NULL) = 0
read(37, "\225\t\3\0<\0\0\0\301s\0\0", 4120) = 12
read(37, 0x6911d70, 4120)               = -1 EAGAIN (Resource temporarily unavailable)
writev(37, [{"\1\311q\216)\0\0\0\301s\0\0:\0\0\0\365\0\0\0\270\0\0\0\0\1\1\0%\0\1\0"..., 196}], 1) = 196
setitimer(ITIMER_REAL, {it_interval={0, 0}, it_value={0, 0}}, NULL) = 0
ioctl(7, 0x6458, 0)                     = 0
select(256, [1 3 5 8 9 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 37], NULL, NULL, {0, 19000}) = 1 (in [37], left {0, 14696})
setitimer(ITIMER_REAL, {it_interval={0, 20000}, it_value={0, 20000}}, NULL) = 0
read(37, "\225\25\10\0:\0\0\0\301s\0\0\301s\0\0\0\0\0\0a\0\0\0\1\0\0\0<\0\0\0", 4120) = 32
ioctl(7, 0xc06864a2

-- 
X server hard crash when kubuntu System Settings Display app is started
https://bugs.launchpad.net/bugs/477134
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