Originally Posted by netllama
So at this point, you've determined that the instability is only triggered with __GL_SYNC_TO_VBLANK turned on, while running a fullscreen application using your "1280x720_60" modeline?
If so, yes, I'd be curious whether disabling __GL_SYNC_TO_VBLANK has any impact.
Also, how did you obtain those custom modelines?
I got them from the internet or a modeline generator.
The drivers don't detect 1280x720 as a mode without them, the windows drivers do, and 1280x720 works w/ this modeline and ignoring bits of EDID as shown in the bug report.
I have to head to work, I'll be able to test this in about an hour and a half.