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[Kendall Gifford <567696@xxxxxxxxxxxxxxxxxx>]

Add me to the list: Ubuntu Desktop 10.10 64-bit
Dell Vostro 220 (Intel Core 2 Duo E7500 w/Intel Chipset MB)
- built-in Intel graphics adapter (disabled)
- installed GeForce 8400 GS (DVI and VGA output)
- using the nouveau driver w/nvidia card w/dual-headed display

When my "system" freezes, the mouse still moves fine (isn't slow) but
all mouse and keyboard input is ignored (including CTRL+ALT Backspace,
CTRL+ALT Fx, etc.). The display is frozen except that the mouse cursor
can be moved around.

I *DO NOT* have any of the "NMI" messages that others have reported in
any of my log files. Also, I've never suspended my system so there is no
correlation with others who seem to have this issue after a suspend.

My system will usually run for server hours at a time just fine but is
still guaranteed to have this issue eventually. The crash/freeze has
always happened while viewing/editing a company wiki page in Firefox
(probably just a statistical coincidence) and running a Window XP
virtual guest (using qemu-kvm and libvirt).

Here's the moment of freeze in my Xorg.0.log:

[ 12056.181] [mi] EQ overflowing. The server is probably stuck in an infinite loop.
[ 12056.181] 
Backtrace:
[ 12056.436] 0: /usr/bin/X (xorg_backtrace+0x28) [0x45c5a8]
[ 12056.436] 1: /usr/bin/X (mieqEnqueue+0x1f4) [0x458ea4]
[ 12056.436] 2: /usr/bin/X (xf86PostMotionEventP+0xc4) [0x488d74]
[ 12056.436] 3: /usr/lib/xorg/modules/input/evdev_drv.so (0x7fd346d1e000+0x5319) [0x7fd346d23319]
[ 12056.437] 4: /usr/lib/xorg/modules/input/evdev_drv.so (0x7fd346d1e000+0x5a0e) [0x7fd346d23a0e]
[ 12056.437] 5: /usr/bin/X (0x400000+0x6d4e7) [0x46d4e7]
[ 12056.437] 6: /usr/bin/X (0x400000+0x1161a3) [0x5161a3]
[ 12056.437] 7: /lib/libpthread.so.0 (0x7fd34c17a000+0xfb40) [0x7fd34c189b40]
[ 12056.437] 8: /lib/libc.so.6 (ioctl+0x7) [0x7fd34b1a5467]
[ 12056.448] 9: /lib/libdrm.so.2 (drmIoctl+0x28) [0x7fd3497540a8]
[ 12056.448] 10: /lib/libdrm.so.2 (drmCommandWrite+0x1b) [0x7fd34975432b]
[ 12056.449] 11: /lib/libdrm_nouveau.so.1 (0x7fd349116000+0x2a9d) [0x7fd349118a9d]
[ 12056.449] 12: /lib/libdrm_nouveau.so.1 (nouveau_bo_map_range+0xff) [0x7fd349118c8f]
[ 12056.449] 13: /lib/libdrm_nouveau.so.1 (0x7fd349116000+0x1d1a) [0x7fd349117d1a]
[ 12056.449] 14: /lib/libdrm_nouveau.so.1 (nouveau_pushbuf_flush+0x190) [0x7fd3491180f0]
[ 12056.449] 15: /usr/lib/xorg/modules/libexa.so (0x7fd34826e000+0x9c95) [0x7fd348277c95]
[ 12056.449] 16: /usr/lib/xorg/modules/libexa.so (0x7fd34826e000+0xaee1) [0x7fd348278ee1]
[ 12056.449] 17: /usr/bin/X (0x400000+0xdd0ad) [0x4dd0ad]
[ 12056.449] 18: /usr/lib/xorg/modules/libexa.so (0x7fd34826e000+0xd230) [0x7fd34827b230]
[ 12056.449] 19: /usr/bin/X (0x400000+0xdc880) [0x4dc880]
[ 12056.449] 20: /usr/bin/X (0x400000+0xd1ce8) [0x4d1ce8]
[ 12056.449] 21: /usr/bin/X (0x400000+0x3f979) [0x43f979]
[ 12056.449] 22: /usr/bin/X (0x400000+0x2187b) [0x42187b]
[ 12056.449] 23: /lib/libc.so.6 (__libc_start_main+0xfe) [0x7fd34b0e5d8e]
[ 12056.449] 24: /usr/bin/X (0x400000+0x21409) [0x421409]

I'm unwilling to try the suggested downgrade of gdm since others have
reported that it didn't fix anything for them.

** Attachment added: "Xorg.0.log file"
   https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/567696/+attachment/1836599/+files/Xorg.0.log

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https://bugs.launchpad.net/bugs/567696

Title:
  [Radeon] [Lucid] [mi] EQ overflowing. The server is probably stuck in
  an infinite loop