Public bug reported:

Binary package hint: xserver-xorg-video-intel

I have a dual-head setup.  The primary VGA crontroller is a 845G based,
and the secondary vga controller is a Matrox Millenium II.  When I
enable Xinerama in /etc/X11/xorg.conf, the X server dies with signal 11
immediately upon startup (see log below).  If I change the driver from
"intel" to "i810" for the 845G controller, the setup works normally.

[EMAIL PROTECTED]:~# startx
xauth:  creating new authority file /home/melkins/.serverauth.6353

X Window System Version 1.3.0
Release Date: 19 April 2007
X Protocol Version 11, Revision 0, Release 1.3
Build Operating System: Linux Ubuntu (xorg-server 2:1.3.0.0.dfsg-12ubuntu8)
Current Operating System: Linux ubuntu 2.6.22-14-generic #1 SMP Sun Oct 14 
23:05:12 GMT 2007 i686
Build Date: 29 September 2007
        Before reporting problems, check http://wiki.x.org
        to make sure that you have the latest version.
Module Loader present
Markers: (--) probed, (**) from config file, (==) default setting,
        (++) from command line, (!!) notice, (II) informational,
        (WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(==) Log file: "/var/log/Xorg.0.log", Time: Tue Nov  6 10:56:44 2007
(==) Using config file: "/etc/X11/xorg.conf"

(II) Module already built-in
(II) Module already built-in
(EE) intel(0): detecting sil164
(EE) intel(0): Unable to read from DVOI2C_E Slave 112.
(EE) intel(0): Unable to read from DVOI2C_E Slave 236.
(EE) intel(0): ivch: Unable to read register 0x00 from DVOI2C_B:04.
(EE) intel(0): Unable to read from DVOI2C_E Slave 112.
(EE) intel(0): tfp410 not detected got VID FFFFFFFF: from DVOI2C_E Slave 112.
(II) Module already built-in
(II) Module already built-in
(II) Module already built-in
(II) Module already built-in
(EE) intel(0): [dri] DRIScreenInit failed. Disabling DRI.

Backtrace:
0: /usr/bin/X11/X(xf86SigHandler+0x81) [0x80c9581]
1: [0xffffe420]
2: /usr/bin/X11/X(xf86RandR12SetRotations+0x6b) [0x80fe2cb]
3: /usr/bin/X11/X(xf86CrtcScreenInit+0x9e) [0x80fa45e]
4: /usr/lib/xorg/modules/drivers//intel_drv.so [0xb7bc3eac]
5: /usr/bin/X11/X(AddScreen+0x1ee) [0x807653e]
6: /usr/bin/X11/X(InitOutput+0x21e) [0x80a86ce]
7: /usr/bin/X11/X(main+0x27b) [0x8076ceb]
8: /lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe0) [0xb7d8a050]
9: /usr/bin/X11/X(FontFileCompleteXLFD+0x1e1) [0x8076241]

Fatal server error:
Caught signal 11.  Server aborting

XIO:  fatal IO error 104 (Connection reset by peer) on X server ":0.0"
      after 0 requests (0 known processed) with 0 events remaining.

** Affects: xserver-xorg-video-intel (Ubuntu)
     Importance: Undecided
         Status: New

-- 
X server crashes when using Xinerama with "intel" driver
https://bugs.launchpad.net/bugs/160575
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