[Bug 34237] External LCD monitor flickers every 30 seconds radeon mobility x1400

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=34237

--- Comment #15 from Alex Deucher <agd5f at yahoo.com> 2011-03-02 07:28:27 PST ---
(In reply to comment #14)
> I've tried 2.6.38-rc6-git 7 (which seems to include Dave's drm-fixes) w/o any
> success. I still got intermitent black screen.
> For the record, my LCD is behind a KVM that corrupts EDID thus making the
> kernel to keep loudly complaining in dmesg

It it happens it regular intervals it sounds like some sort of polling.  Have
you tried drm_kms_helper.poll=0?  Also, make sure knotify or upowerd are not
polling the monitors regularly.

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