[Bug 76861] radeon: flickering horizontal stripes/lines

bugzilla-daemon at bugzilla.kernel.org bugzilla-daemon at bugzilla.kernel.org
Mon May 26 07:18:26 PDT 2014


--- Comment #7 from Christian König <deathsimple at vodafone.de> ---
(In reply to Sven Dziadek from comment #5)
> Created attachment 137421 [details]
> patched with value 107
> Value 107 works for me. I am currently testing which is the highest value
> working for me. I think, this is what you need?

The highest working value would be nice indeed, but the problem is that the
numbers get reduced once more after applying the limit.

For example with the value 105 the ratio of 11292/105 gets reduced to 3764/35
(both sides divided by 3) before it is send to the hardware.

Take a look at the following lines in the log and try different values between
100 and 114:
[drm:radeon_compute_pll_avivo] 154000 - 154000, pll dividers - fb: 376.4 ref:
5, post 7

A value below 100 is known to not work correctly for some users, values above
128 doesn't work for some other users. We essentially need to figure out the
sweet spot in between.

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