X server stuck in infinite loop

[Flow_]

Hi there,

I have a Linux setup with two nvidia graphics cards and three monitors:

01:00.0 VGA compatible controller: nVidia Corporation G92 [GeForce 9800 GTX] (rev a2)
05:02.0 VGA compatible controller: nVidia Corporation NV44A [GeForce 6200] (rev a1)

Sometimes the X server stops responding. SSH login works. But only a reboot can bring up a working X server again.
Driver is latest stable 275.09.07, for more information see attached .tar.gz.

Relevant part of Xorg.log:
[ 2951.551] (WW) NVIDIA(0): WAIT (2, 6, 0x8000, 0xdfff2fff, 0x000095a0)
[ 2952.951] [mi] EQ overflowing. The server is probably stuck in an infinite loop.
[ 2952.951]
Backtrace:
[ 2952.952] 0: /usr/bin/X (xorg_backtrace+0x28) [0x4b4dc8]
[ 2952.952] 1: /usr/bin/X (mieqEnqueue+0x1f3) [0x4b4593]
[ 2952.952] 2: /usr/bin/X (xf86PostMotionEventM+0x92) [0x489572]
[ 2952.952] 3: /usr/bin/X (xf86PostMotionEventP+0x3c) [0x48966c]
[ 2952.952] 4: /usr/lib64/xorg/modules/input/evdev_drv.so (0x7ff4ccce7000+0x5c7e) [0x7ff4cccecc7e]
[ 2952.952] 5: /usr/bin/X (0x400000+0x777e7) [0x4777e7]
[ 2952.952] 6: /usr/bin/X (0x400000+0x13f839) [0x53f839]
[ 2952.952] 7: /lib64/libpthread.so.0 (0x7ff4d31f2000+0xf430) [0x7ff4d3201430]
[ 2952.952] 8: /lib64/libpthread.so.0 (0x7ff4d31f2000+0xffff800b2c40e108) [0xffffffffff600108]
[ 2958.551] (WW) NVIDIA(0): WAIT (1, 6, 0x8000, 0xdfff2fff, 0x000095a0)
[ 2961.552] (WW) NVIDIA(1): WAIT (2, 6, 0x8000, 0xdffb4fff, 0x0000cb74)
[ 2968.552] (WW) NVIDIA(1): WAIT (1, 6, 0x8000, 0xdffb4fff, 0x0000cb74)
[ 2968.552]
Backtrace:
[ 2968.553] 0: /usr/bin/X (xorg_backtrace+0x28) [0x4b4dc8]
[ 2968.553] 1: /usr/bin/X (0x400000+0x6cf09) [0x46cf09]
[ 2968.553] 2: /lib64/libpthread.so.0 (0x7ff4d31f2000+0xf430) [0x7ff4d3201430]
[ 2968.553] 3: /lib64/libc.so.6 (memcpy+0x15b) [0x7ff4d21b3eab]
[ 2968.553] 4: /usr/lib64/xorg/modules/drivers/nvidia_drv.so (0x7ff4cdcfb000+0xe577a) [0x7ff4cdde077a]
[ 2968.553] 5: /usr/lib64/xorg/modules/drivers/nvidia_drv.so (0x7ff4cdcfb000+0xe5c73) [0x7ff4cdde0c73]
[ 2968.553] 6: /usr/lib64/xorg/modules/drivers/nvidia_drv.so (0x7ff4cdcfb000+0x6623d) [0x7ff4cdd6123d]
[ 2968.553] 7: /usr/bin/X (0x400000+0x166712) [0x566712]
[ 2968.553] 8: /usr/bin/X (0x400000+0x166861) [0x566861]
[ 2968.553] 9: /usr/bin/X (0x400000+0x164990) [0x564990]
[ 2968.553] 10: /usr/bin/X (miPointerUpdateSprite+0x176) [0x463fa6]
[ 2968.553] 11: /usr/bin/X (0x400000+0x64277) [0x464277]
[ 2968.553] 12: /usr/bin/X (0x400000+0xbcd8b) [0x4bcd8b]
[ 2968.553] 13: /usr/bin/X (0x400000+0x192f84) [0x592f84]
[ 2968.553] 14: /usr/bin/X (0x400000+0x40d62) [0x440d62]
[ 2968.553] 15: /usr/bin/X (0x400000+0x424b4) [0x4424b4]
[ 2968.553] 16: /usr/bin/X (0x400000+0xf8fcb) [0x4f8fcb]
[ 2968.553] 17: /usr/bin/X (0x400000+0x11914b) [0x51914b]
[ 2968.553] 18: /usr/bin/X (mieqProcessDeviceEvent+0x1c2) [0x4b4142]
[ 2968.553] 19: /usr/bin/X (mieqProcessInputEvents+0x60) [0x4b41c0]
[ 2968.553] 20: /usr/bin/X (ProcessInputEvents+0x9) [0x477a49]
[ 2968.553] 21: /usr/bin/X (0x400000+0x312c3) [0x4312c3]
[ 2968.553] 22: /usr/bin/X (0x400000+0x24a5a) [0x424a5a]
[ 2968.553] 23: /lib64/libc.so.6 (__libc_start_main+0xfd) [0x7ff4d2151d2d]
[ 2968.553] 24: /usr/bin/X (0x400000+0x245f9) [0x4245f9]
[ 2968.553] Segmentation fault at address 0x7ff4cd44e000
[ 2968.553]
Fatal server error:
[ 2968.553] Caught signal 11 (Segmentation fault). Server aborting

[sandipt]

Please try ftp://download.nvidia.com/XFree86/Linux-x86_64/280.04/ driver.