For the past few weeks, I've been getting Blue Screens of Death, saying DPC_WATCHDOG_VIOLATION ... And I think I traced them to suspending GPUGrid.net tasks.

When the task is unloaded (either manually by the user via Suspend, or automatically by BOINC when rotating tasks), sometimes Windows will blue-screen.

Is that possible?
Would one of the developers mind taking a look at my crash dump?

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Tasks I've seen the problem on:
- I4R80-NATHAN_RPS1120801_N-41-111-RND1812_0

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System:
Windows 8 x64 RTM
Intel i7 965 XE
GPU Device 0: GTX 460
GPU Device 1: GTS 240 (disabled in cc_config)
GPU Device 2: GTS 240 (disabled in cc_config)

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Crash details:

The computer has rebooted from a bugcheck. The bugcheck was: 0x00000133 (0x0000000000000001, 0x0000000000000784, 0x0000000000000000, 0x0000000000000000). A dump was saved in: C:\Windows\MEMORY.DMP. Report Id: 102012-26364-01.

EventData
param1 0x00000133 (0x0000000000000001, 0x0000000000000784, 0x0000000000000000, 0x0000000000000000)
param2 C:\Windows\MEMORY.DMP
param3 102012-26364-01

BugcheckCode 307
BugcheckParameter1 0x1
BugcheckParameter2 0x784
BugcheckParameter3 0x0
BugcheckParameter4 0x0

Regards,
Jacob Klein

AFAIK the watchdog triggers when the display driver takes too long to respond. You can increase the time limit or remove it completely, I know that Snow Crash has done it with success and may be able to help you. It applies to Win7 so I assume it would also apply to Win8. It involves a registry edit but I'm not sure what exactly.

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XtremeSystems.org - #1 Team in GPUGrid

If you could help me locate that registry setting, it'd be much appreciated. I can't seem to find it.

I did more research, and came up with the following articles, which contain useful information for changing the duration of the DPC Watchdog Timer, or disabling it entirely:

Windows 2000 (XDDM) driver model:
http://msdn.microsoft.com/en-us/library/windows/hardware/ff553890%28v=vs.85%29.aspx

Windows Vista (WDDM) driver model:
http://msdn.microsoft.com/en-us/library/windows/hardware/ff569918%28v=vs.85%29.aspx

3rd-party Blog article
http://arturmarques.com/wordpress/index.php/2010/05/05/watchdog-sys-disable-it-or-increase-its-tolerance/

However, I didn't find the keys immediately in Windows 8. I think they changed the structure.

This website shows that Microsoft was changing the DPC settings structure/location throughout Windows 8 development:
http://redplait.blogspot.com/2012/06/cmcontrolvector-for-w8.html

In Computer\HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Power
I'm seeing
WatchDogResumeTimeout (REG_DWORD, default value 0x78 (120))
WatchDogSleepTimeout (REG_DWORD, default value 0x12c (300))

Not sure if I'll be editing these yet, just reporting my findings.