X server 1.6.5 crashes when LCD going to sleep Quadro 5000

[josp]

SLED11SP2, driver 304.43
config - 2 LCD

- random crases when screensaver stared or LCD going to sleep
- same problem on driver 295.xx

Thanks.

Backtrace:
0: /usr/bin/Xorg(xorg_backtrace+0x26) [0x4f4916]
1: /usr/bin/Xorg(xf86SigHandler+0x39) [0x485559]
2: /lib64/libc.so.6(+0x32bf0) [0x7f6755271bf0]
3: /usr/bin/Xorg() [0x4ba507]
4: /usr/bin/Xorg() [0x4ba8b5]
5: /usr/lib64/xorg/modules//drivers/nvidia_drv.so(+0x810f4) [0x7f67505be0f4]
6: /usr/lib64/xorg/modules//drivers/nvidia_drv.so(+0x11adfe) [0x7f6750657dfe]
7: /usr/lib64/xorg/modules//drivers/nvidia_drv.so(+0x195301) [0x7f67506d2301]
8: /usr/lib64/xorg/modules//drivers/nvidia_drv.so(+0x197ccf) [0x7f67506d4ccf]
9: /usr/lib64/xorg/modules//drivers/nvidia_drv.so(+0x11aa03) [0x7f6750657a03]
10: /usr/lib64/xorg/modules//drivers/nvidia_drv.so(+0x8e55c) [0x7f67505cb55c]
11: /usr/lib64/xorg/modules//drivers/nvidia_drv.so(+0xe0d51) [0x7f675061dd51]
12: /usr/bin/Xorg(DPMSSet+0xdb) [0x484e2b]
13: /usr/bin/Xorg(mieqProcessInputEvents+0x358) [0x4d56f8]
14: /usr/bin/Xorg(ProcessInputEvents+0x9) [0x486189]
15: /usr/bin/Xorg(Dispatch+0x91) [0x44e5f1]
16: /usr/bin/Xorg(main+0x3aa) [0x43403a]
17: /lib64/libc.so.6(__libc_start_main+0xe6) [0x7f675525dc36]
18: /usr/bin/Xorg() [0x4334d9]