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Bug#410956: xorg: xserver freezes irregularly when applications use lots of memory

Package: xorg
Version: 1:7.1.0-11
Severity: critical
Justification: breaks the whole system

>From time to time, especially when using "big" applications (e.g., Gimp)
the system just freezes, leaving nothing in the syslog. The only way of
recovering is by switching off and on the power switch. I finally
succeeded in capturing some log messages that appeared on the tty of a
remote logged-in user. It mentions 'kernel BUG' and the process Xorg, so
I thought it wise to send in a bug report.

I'll be happy to send in any extra info you'll need, but so far I have
not succeeded in reliably reproducing the freeze events.

Message from syslogd@aglarond at Wed Feb 14 10:04:52 2007 ...
aglarond kernel: ------------[ cut here ]------------
aglarond kernel: kernel BUG at mm/rmap.c:587!
aglarond kernel: invalid opcode: 0000 [#1]
aglarond kernel: SMP
aglarond kernel: CPU:    0
aglarond kernel: EIP is at page_remove_rmap+0x14/0x2d
aglarond kernel: eax: ffffffff   ebx: c10bf640   ecx: c10bf640   edx: c10bf640
aglarond kernel: esi: b232d000   edi: 00000020   ebp: c5f2dcb4   esp: da7e7f00
aglarond kernel: ds: 007b   es: 007b   ss: 0068
aglarond kernel: Process Xorg (pid: 3015, ti=da7e6000 task=da601000 task.ti=da7e6000)
aglarond kernel: Stack: c014b88f b2317000 cbe62da0 da7e7f6c 00000000 00000000 b2400000 d9cecb20
aglarond kernel:        d9c3fac0 c14040c0 ffffffea ffffffff c10be5ac d9cecb20 003e9000 b26a3000
aglarond kernel:        00000000 c14040c0 d9c3fac0 d9f56d4c cef662cc c014de97 b26a3000 da7e7f68
aglarond kernel: Call Trace:
aglarond kernel: Code: ff ff 85 c0 89 c6 75 c9 b0 01 86 43 28 83 c4 20 89 e8 5b 5e 5f 5d c3 89 c1 90 83 40 08 ff 0f 98 c0 84 c0 74 1e 8b 41 08 40 79 08 <0f> 0b 4b 02 15 aa 29 c0 8b 51 10 89 c8 83 f2 01 83 e2 01 e9 f3
aglarond kernel: EIP: [<c01506e9>] page_remove_rmap+0x14/0x2d SS:ESP 0068:da7e7f00
(Each 'aglarond' line was preceded with a similar 'Message from' line, which I removed except the very first.)

lspci reports as graphics card:
01:00.0 VGA compatible controller: Matrox Graphics, Inc. MGA G400/G450 (rev 04)

-- System Information:
Debian Release: 4.0
  APT prefers testing
  APT policy: (500, 'testing'), (500, 'stable')
Architecture: i386 (i686)
Shell:  /bin/sh linked to /bin/bash
Kernel: Linux 2.6.18-3-686
Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968)

Versions of packages xorg depends on:
ii  gnome-terminal [x-term 2.14.2-1          The GNOME 2 terminal emulator appl
ii  konsole [x-terminal-em 4:3.5.5a.dfsg.1-5 X terminal emulator for KDE
ii  libgl1-mesa-dri        6.5.1-0.5         A free implementation of the OpenG
ii  libgl1-mesa-glx        6.5.1-0.5         A free implementation of the OpenG
ii  libglu1-mesa           6.5.1-0.5         The OpenGL utility library (GLU)
ii  rxvt [x-terminal-emula 1:2.6.4-10        VT102 terminal emulator for the X 
ii  type-handling [not+spa 0.2.19            dpkg architecture generation scrip
ii  xbase-clients          1:7.1.ds1-2       miscellaneous X clients
ii  xfonts-100dpi          1:1.0.0-3         100 dpi fonts for X
ii  xfonts-75dpi           1:1.0.0-3         75 dpi fonts for X
ii  xfonts-base            1:1.0.0-4         standard fonts for X
ii  xfonts-scalable        1:1.0.0-6         scalable fonts for X
ii  xkb-data               0.9-4             X Keyboard Extension (XKB) configu
ii  xserver-xorg           1:7.1.0-11        the X.Org X server
ii  xterm [x-terminal-emul 222-1etch2        X terminal emulator
ii  xutils                 1:7.1.ds.3-1      X Window System utility programs

xorg recommends no packages.

-- no debconf information

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