Comment 20 for bug 556253

Seems my concerns about this were justified - https://lists.ubuntu.com/archives/kernel-team/2010-March/009613.html

The upstream change feels like one of those that makes sense "in theory" but doesn't take all hardware configurations into account.

Martin, to isolate g-s-d, remove your monitors.xml file (in .config somewhere). If that is not present, AFAIK g-s-d will not attempt to do any changes to your system. If that makes the problem go away, then this bug should focus on g-s-d.

Otherwise, perhaps reverse-quirks in the kernel are needed. I might even suggest backing out the upstream patch, and sticking with individual quirks. Quirking individual systems means a lot of work, but at least it's well understood how to recognize the problem and incorporate the quirk.