[Bug 29787] random XRandR failures (i2c related?)

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https://bugs.freedesktop.org/show_bug.cgi?id=29787

--- Comment #9 from Arno Schuring <aelschuring@hotmail.com> 2010-09-17 02:19:58 PDT ---
While I still can't reproduce this at will, both the EDID errors and xrandr
resets seem related to system load. When the system is idle, or I'm simply
browsing or text-editing, the problems don't happen. However, when I'm
stressing the system (which is not that hard on this old machine), for example
creating a backup or compiling a kernel, I get multiple EDID errors per minute
and occasional resets.

Since I've been running with the patch, I have only seen position resets on the
left monitor. The right monitor has never lost its rotation.

I can't reproduce this by pegging the cpu, I need to generate a lot of disk
activity. So I think it is related to latency rather than throughput. Also, X
seems to hang for 50-500ms every time an EDID message appears in syslog, as I
can see the mouse cursor freezing. When the freeze lasts more than a second, it
is usually followed by an XRandR reset.

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