Messages in this thread | | | Date | Mon, 7 Jun 2010 01:58:53 -0400 | Subject | Re: Linux 2.6.35-rc2 | From | Alex Deucher <> |
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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?
> > Comparing the DRM output from 2.6.34 and 2.6.35-rc2 I see the > following differences: > On 2.6.35-rc2 this block is missing: > [ 1.907716] [drm] GPU reset succeed (RBBM_STATUS=0x00000140) > [ 1.913403] [drm] 1 Power State(s) > [ 1.916810] [drm] State 0 Default (default) > [ 1.921017] [drm] 16 PCIE Lanes > [ 1.924255] [drm] 1 Clock Mode(s) > [ 1.927662] [drm] 0 engine/memory: 325000/200000 > [ 1.932496] [drm] radeon: power management initialized > New on 2.6.35: [ 1.951340] [TTM] Initializing pool allocator. > Only on 2.6.34: [ 2.011963] [drm] radeon: cp idle (0x10000C03) > Only on 2.6.34: [ 2.020478] platform radeon_cp.0: firmware: using > built-in firmware radeon/R300_cp.bin > > On 2.6.34 the output for connector 1 is: > [ 2.090935] [drm] Connector 1: > [ 2.094002] [drm] DVI-I > [ 2.096629] [drm] HPD1 > [ 2.099174] [drm] DDC: 0x64 0x64 0x64 0x64 0x64 0x64 0x64 0x64 > [ 2.105210] [drm] Encoders: > [ 2.108189] [drm] CRT2: INTERNAL_DAC2 > [ 2.112222] [drm] DFP1: INTERNAL_TMDS1 > With 2.6.35-rc2 the line 'HPD1' switches to 'NONE' >
Whoops. that's a typo in the print out. I'll send Dave a patch to fix that.
Alex
> Everything else is identical. I have attached complete dmesg from both > kernels to this mail. > > Torsten > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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