Hello All,

My primary crunching machine is an AMD 1100T six core processor with a single GTX 460 GPU. This machine is also my media center/gaming machine (it has a TV tuner and plays Blu-Rays) and it is hooked up to my plasma TV in the living room.

I've noticed that every single time I turn off the TV, my BOINC manager says my GPU is missing. I've done testing and have been able to reproduce this every time. I turn off the TV, VNC into the computer, and sure enough BOINC says "GPU Missing". Every single time I turn off the TV, I have to VNC into my computer and switch my preferences to "Run Always" then back to "Run based on Preferences" to get my GPU crunching again. My guess is that this has to do with the way Windows 7 handles HDCP handshakes and disconnects (this PC is connected to the TV over HDMI). When I'm watching a Blu-Ray through the PC for example, if I turn the TV off, when I turn it back on I get a message about HDCP failure and how I need to use a HDCP-compliant display and video card. They are both compliant, I know that.. I think what happens there is what happens when BOINC can't find my GPU. I think the graphics card receives an "off" signal from the TV via HDMI, which breaks HDCP. Then, Windows 7 flips some switch or sets some flag that interferes with BOINC seeing the GPU.

Does anyone have any ideas as to how I can keep my PC crunching when I turn off the TV? If I forget to re-enable the GPU, I could go days without my GPU doing any work :( any help would be appreciated!

I'm on BOINC 7.0.28 and the latest nVidia drivers.

I'm on BOINC 7.0.28 and the latest nVidia drivers.

Do you really mean you are running the 306.02 Cuda 5 Beta drivers released six days ago?

If not, please give us a real number rather than just saying "the latest"...

There are known problems, not dissimilar to this, with the 295.73 and 296.10 WHQL drivers.

Apologies. I'm on 301.42, which when I go to download drivers from the nVidia website is the most recent version they give me for my card.

Apologies. I'm on 301.42, which when I go to download drivers from the nVidia website is the most recent version they give me for my card.

OK, that rules out the 'monitor sleep' bug present in 295.73 and 296.10 (and predominantly affecting DVI connections). I'm not so familiar with HDMI, but I'm sure somebody here will be.