Comment 4 for bug 345796

Created an attachment (id=24448)
xorg.conf

I've just gotten about five crashes of the X server, each with the backtrace:

0: X(xorg_backtrace+0x26) [0x4ea426]
1: X(xf86SigHandler+0x39) [0x47e0f9]
2: /lib/libc.so.6 [0x7f4d381e7040]
3: /usr/lib/libdrm_intel.so.1(drm_intel_bo_unpin+0) [0x7f4d3705db70]
4: /usr/lib64/xorg/modules/drivers//intel_drv.so [0x7f4d3729cb89]
5: /usr/lib64/xorg/modules/drivers//intel_drv.so(i830_crtc_dpms_video+0x4a) [0x7f4d3729cc0a]
6: /usr/lib64/xorg/modules/drivers//intel_drv.so [0x7f4d37289fa1]
7: X(xf86DPMSSet+0x95) [0x4a3805]
8: X(xf86SaveScreen+0x29) [0x4a3fa9]
9: X(dixSaveScreens+0x241) [0x43a2d1]
10: X [0x4e733b]
11: X [0x4e7728]
12: X(WaitForSomething+0x56b) [0x4e7d7b]
13: X(Dispatch+0x7f) [0x449fff]
14: X(main+0x44d) [0x430b2d]
15: /lib/libc.so.6(__libc_start_main+0xe6) [0x7f4d381d25c6]
16: X [0x42ff19]

The crashes only seem to happen when I'm not using the X server (probably right when it turns off the monitors): the system seems quite reliable so long as I'm actually using it. But then when I go away, and come back to find the monitors in power-saving mode, often the server has crashed, leaving the keyboard in an unusable state, requiring a reboot via the power button.

My setup is:

G965 with dual-DVI ADD2 card, driving two monitors.
Gentoo Linux
xf86-video-intel-2.6.3-r1
libdrm-2.4.5
xorg-server-1.5.3-r5
Linux kernel 2.6.29. (I also tested it with 2.6.28, and got the same crash.)