Xorg server using 100% CPU. Can reproduce. Need help to track the issue

[phil lemelin]

On Wed, May 12, 2010 at 7:16 AM, phil lemelin <phil.lemelin at gmail.com>wrote:

> I will try the patch mentionned in the bug report and report back.
> Many thanks.
>
>
> On Tue, May 11, 2010 at 4:00 PM, Chris Wilson <chris at chris-wilson.co.uk>wrote:
>
>> On Tue, 11 May 2010 14:58:35 -0400, phil lemelin <phil.lemelin at gmail.com>
>> wrote:
>> > Good evening list,
>> >
>> > I'm having a reproducible issue with the X when using "vmg" (
>> > http://magnifier.sourceforge.net/ ). It will systematically make the
>> Xorg
>> > process use 100% cpu and basically locks the machine. I just start it,
>> move
>> > it around and I hit the issue.
>>
>> Sounds like https://bugzilla.kernel.org/show_bug.cgi?id=15911
>>
>> --
>> Chris Wilson, Intel Open Source Technology Centre
>>
>
>
> Phil.
>

I downloaded the 2.6.32.12 kernel and patched it since the patch would'nt
work well with my 2.6.29.6 kernel and here is what I get after a couple of
minutes playing with the magnifier. I seem to be able to play longer before
experiencing the crash however.
I can provide the corresponding Xorg.0.log if it is relevant.

[root at localhost ~]# /usr/local/bin/Xorg

X.Org X Server 1.7.6
Release Date: 2010-03-17
X Protocol Version 11, Revision 0
Build Operating System: Linux 2.6.32.12 i686
Current Operating System: Linux localhost 2.6.32.12 #4 SMP Wed May 12
10:12:55 EDT 2010 i686
Kernel command line:
Build Date: 12 May 2010  01:37:47PM

Current version of pixman: 0.15.20
    Before reporting problems, check http://wiki.x.org
    to make sure that you have the latest version.
Markers: (--) probed, (**) from config file, (==) default setting,
    (++) from command line, (!!) notice, (II) informational,
    (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/usr/local/var/log/Xorg.0.log", Time: Wed May 12 13:44:57
2010
(==) Using config file: "/etc/X11/xorg.conf"
xf86TokenToOptinfo: table is NULL
xf86TokenToOptinfo: table is NULL
Setting master
expected keysym, got XF86TouchpadToggle: line 122 of inet
expected keysym, got XF86TouchpadToggle: line 122 of inet
intel_bufmgr_gem.c:713: Error mapping buffer 65452 (pixmap): Cannot allocate
memory .

Backtrace:
0: /usr/local/bin/Xorg (xorg_backtrace+0x3b) [0x80b035b]
1: /usr/local/bin/Xorg (0x8048000+0x60b75) [0x80a8b75]
2: (vdso) (__kernel_rt_sigreturn+0x0) [0xffffe40c]
3: /usr/local/lib/xorg/modules/libfb.so (fbCopyNtoN+0x1a5) [0xb7157b45]
4: /usr/local/lib/xorg/modules/drivers/intel_drv.so (0xb7232000+0x5fd02)
[0xb7291d02]
5: /usr/local/bin/Xorg (miCopyRegion+0x1d6) [0x81a1956]
6: /usr/local/bin/Xorg (miDoCopy+0x4a3) [0x81a1f33]
7: /usr/local/lib/xorg/modules/drivers/intel_drv.so (0xb7232000+0x5f568)
[0xb7291568]
8: /usr/local/bin/Xorg (0x8048000+0xc36c2) [0x810b6c2]
9: /usr/local/bin/Xorg (0x8048000+0x3a399) [0x8082399]
10: /usr/local/bin/Xorg (0x8048000+0x3c56f) [0x808456f]
11: /usr/local/bin/Xorg (0x8048000+0x19a95) [0x8061a95]
12: /lib/i686/libc.so.6 (__libc_start_main+0xe5) [0xb73606a5]
13: /usr/local/bin/Xorg (0x8048000+0x19651) [0x8061651]
Segmentation fault at address 0xffffffff

Fatal server error:
Caught signal 11 (Segmentation fault). Server aborting


Please consult the The X.Org Foundation support
     at http://wiki.x.org
 for help.
Please also check the log file at "/usr/local/var/log/Xorg.0.log" for
additional information.

Dropping master
Aborted



Phil
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