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

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

--- Comment #1 from Alex Deucher <agd5f@xxxxxxxxx> 2011-02-13 13:58:53 PST ---
This sounds like monitor polling on the analog port.  Disable it by booting
with
drm_kms_helper.poll=0 on your kernel command line in grub.  Also make sure kde
is not polling the monitors itself in the background at regular intervals.

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