https://bugs.freedesktop.org/show_bug.cgi?id=29787
--- Comment #12 from Arno Schuring aelschuring@hotmail.com 2010-11-19 03:31:13 PST --- It seems that both the EDID errors and the XRandR failures do not occur when I disable preemption (that, and I'm running 37-rc2 now). I'm currently rebuilding -rc2 with forced preemption again, will alternate between those kernels for the next few days to see what happens.
To give an idea of my current system activity: I'm compiling a kernel while reloading all my tabs in Firefox, having two redraw-happy windows open at the same time, and having three md5sum processes working on large files. System load is peeking at 6.8 according to top (on a UP system), and yet I don't see a single EDID or i2c warning in my dmesg.
This seems in line with my earlier conjecture that the problems are latency-triggered. I will report back once I have more than the current 60 minutes of experience with the new kernel, with both forced preemption and no preemption.