Re: [REGRESSION] i915 VT switch with AIGLX causes X lock up

[Sitsofe Wheeler <sitsofe@yahoo.com>]

On Tue, Feb 24, 2009 at 08:44:09AM -0800, Jesse Barnes wrote:
> Can you get a backtrace of the hung process, maybe by logging in from another 
> machine and using gdb on the Xorg process?

(Done via sleep 30s; gdb.sh where gdb.sh contained the following:
gdb -batch-silent \
-ex 'set logging overwrite on' \
-ex "set logging file /tmp/gdb.log" \
-ex 'set logging on' \
-ex 'handle SIG33 pass nostop noprint' \
-ex 'set pagination 0' \
-ex 'run' \
-ex 'backtrace full' \
-ex 'info registers' \
-ex 'thread apply all backtrace' \
-ex 'quit' \
-p `pidof X` < /dev/null
< /dev/null

Xorg never seems happy after the above finishes and always wedged itself
after the script ran)

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[Thread debugging using libthread_db enabled]
[New Thread 0xb7ccea30 (LWP 2972)]
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Program received signal SIGUSR1, User defined signal 1.
[Switching to Thread 0xb7ccea30 (LWP 2972)]
0xb7fe8424 in __kernel_vsyscall ()
#0  0xb7fe8424 in __kernel_vsyscall ()
No symbol table info available.
#1  0xb7e3984d in select () from /lib/tls/i686/cmov/libc.so.6
No symbol table info available.
#2  0x081b22e5 in WaitForSomething ()
No symbol table info available.
#3  0x0808d69d in Dispatch ()
No symbol table info available.
#4  0x0807471b in main ()
No symbol table info available.
eax            0xfffffdfe	-514
ecx            0x820a240	136356416
edx            0x0	0
ebx            0x100	256
esp            0xbf902cc0	0xbf902cc0
ebp            0xbf902f58	0xbf902f58
esi            0x0	0
edi            0xbf902f40	-1081069760
eip            0xb7fe8424	0xb7fe8424 <__kernel_vsyscall+16>
eflags         0x3246	[ PF ZF IF #12 #13 ]
cs             0x73	115
ss             0x7b	123
ds             0x7b	123
es             0x7b	123
fs             0x0	0
gs             0x33	51

Thread 1 (Thread 0xb7ccea30 (LWP 2972)):
#0  0xb7fe8424 in __kernel_vsyscall ()
#1  0xb7e3984d in select () from /lib/tls/i686/cmov/libc.so.6
#2  0x081b22e5 in WaitForSomething ()
#3  0x0808d69d in Dispatch ()
#4  0x0807471b in main ()
The program is running.  Exit anyway? (y or n) [answered Y; input not from terminal]

-- 
Sitsofe | http://sucs.org/~sits/