I use 7.2.7 x64 on Ubuntu 13.10. I recently installed a second GPU for dedicated crunching. Currently I have GTX550ti with monitor, and GTX 560 no monitor. AMD x4 965BE, no overclock anything.

I am used to using a simple script which runs as
#/bin/bash
boinccmd --set_gpu_mode never 1200
assigned to F12 key, so I can use the computer and not experience laggy graphics.

Is it possible to only disable GTX550ti GPU, and leave GTX560 always running?
There was a post from a year ago asking a similar question, but no real resolution. I also checked the wiki http://boinc.berkeley.edu/wiki/Cc_config.xml and did not find anything that would help.

Any ideas?

Cheers

If you look in the wiki under Client configuration you have these options for ignoring GPUs:

<ignore_ati_dev>N</ignore_ati_dev>
ignore (don't use) a specific ATI GPU. You can ignore more than one. New in 6.10.19

<ignore_cuda_dev>N</ignore_cuda_dev>
ignore (don't use) a specific NVIDIA GPU. You can ignore more than one. New in 6.10.19 and only to be used till 6.12.41.

<ignore_intel_dev>N</ignore_intel_dev>
ignore a specific Intel GPU.

<ignore_nvidia_dev>N</ignore_nvidia_dev>
ignore (don't use) a specific NVIDIA GPU. You can ignore more than one. Replaces <ignore_cuda_dev/> New in 6.13.0 Reminder: Zero will disable device zero, it does not disable the line, only removal does. <ignore_nvidia_dev>1</ignore_nvidia_dev> will ignore the use of the second Nvidia GPU in the system. Before 6.13.0, <ignore_cuda_dev/> was used. <ignore_nvidia_dev> was added to get it more in line with the specific <ignore_ati_dev>.

There is also an option of Excluding GPUs from a particular project (maybe there is a project that doesn't cause lag):

<exclude_gpu>
Don't use the given GPU for the given project. If <device_num> is not specified, exclude all GPUs of the given type. <type> is required if your computer has more than one type of GPU; otherwise it can be omitted. <app> specifies the short name of an application (i.e. the <name> element within the <app> element in client_state.xml). If specified, only tasks for that app are excluded. You may include multiple <exclude_gpu> elements. If you change GPU exclusions, you must restart the BOINC client for these changes to take effect. New in 6.13

<exclude_gpu>
<url>project_URL</url>
[<device_num>N</device_num>]
[<type>NVIDIA|ATI|intel_gpu</type>]
[<app>appname</app>]
</exclude_gpu>

While you are at it, you should upgrade Boinc to the Recommended version, presently 7.2.33,
Boinc 7.2.7 was an Alpha release, there will be various elements in it that won't work correctly as the Bugs hadn't been found or fixed yet.

Claggy