Messages in this thread | | | Date | Mon, 7 Jun 2010 08:09:45 +0200 | Subject | Re: Linux 2.6.35-rc2 | From | Torsten Kaiser <> |
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On Mon, Jun 7, 2010 at 7:58 AM, Alex Deucher <alexdeucher@gmail.com> wrote: > On Sun, Jun 6, 2010 at 11:04 AM, Torsten Kaiser > <just.for.lkml@googlemail.com> wrote: >> [CC:Jeff+Tejun not removed, because you might want to look at the >> attached dmesgs] >> >> On Sun, Jun 6, 2010 at 4:19 PM, Linus Torvalds >> <torvalds@linux-foundation.org> wrote: >>> On Sun, 6 Jun 2010, Torsten Kaiser wrote: >>>> >>>> The first problem that shows up is, that after the KMS switches to the >>>> correct video mode (1280x1024 for an DVI attached LCD), the display >>>> begins to flicker. Every 1..2 seconds (guesstimated) the display turns >>>> off and on again. Something in the new powersaving? >>> >>> Or maybe a borderline display timing that the display has trouble syncing >>> up with? >> >> With 2.6.34 and any previous KMS kernels the output was always stable. >> (I think, I switch to the radeon KMS on 2.6.32) >> The onscreen menu of the monitor showed 1280x1024@60.2Hz for >> 2.6.35-rc2, if I recall correctly. >> Now back on 2.6.34 its 1280x1024@59.9Hz. > > The pm code shouldn't have any affect as your system only has one > power state, so it never kicks in. It sounds like a display pll > problem, but there haven't been any changes to that code since 2.6.34. > Any chance you could bisect it?
Not really. -rc1 did not boot for me (although if I disable v4l that might work), and there is this memory corruption error.
Regarding the PLLs, did you see this mail? It contains the drm.debug=15 output from 2.6.34 and 2.6.35-rc2. http://lkml.org/lkml/2010/6/6/126
The debug output from radeon_set_pll looks identical. But in 2.6.35 a call to [drm:radeon_legacy_tmds_int_dpms], seems new.
The switchoff intervall is ~10 seconds, not 1..2 as I guessed in the first mail. Any idea if there is something in the KMS code that triggers at this intervall?
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