[Intel-gfx] drm-intel-nightly: [drm] Wrong MCH_SSKPD value: 0x16040307

[Daniel Vetter]

On Thu, Feb 14, 2013 at 11:26 AM, Sedat Dilek <sedat.dilek at gmail.com> wrote:
> On Wed, Feb 13, 2013 at 12:15 PM, Sedat Dilek <sedat.dilek at gmail.com> wrote:
>> Hi,
>>
>> dunno if this is a problem of i915 or drm, seen with today's next plus
>> drm-intel-nightly on top:
>>
>> $ dmesg | egrep -i 'vga|drm|i915|fbcon|fb0:|fb1:|frame buffer'
>> [    0.169185] vgaarb: device added:
>> PCI:0000:00:02.0,decodes=io+mem,owns=io+mem,locks=none
>> [    0.169192] vgaarb: loaded
>> [    0.169194] vgaarb: bridge control possible 0000:00:02.0
>> [   10.753557] [drm] Initialized drm 1.1.0 20060810
>> [   11.893511] [drm] Memory usable by graphics device = 2048M
>> [   11.893519] i915 0000:00:02.0: setting latency timer to 64
>> [   11.932298] i915 0000:00:02.0: irq 49 for MSI/MSI-X
>> [   11.932314] [drm] Supports vblank timestamp caching Rev 1 (10.10.2010).
>> [   11.932316] [drm] Driver supports precise vblank timestamp query.
>> [   11.932388] vgaarb: device changed decodes:
>> PCI:0000:00:02.0,olddecodes=io+mem,decodes=io+mem:owns=io+mem
>> [   11.942391] [drm] Wrong MCH_SSKPD value: 0x16040307
>> [   11.942395] [drm] This can cause pipe underruns and display issues.
>> [   11.942396] [drm] Please upgrade your BIOS to fix this.
>> [   11.958989] fbcon: inteldrmfb (fb0) is primary device
>> [   13.004539] Console: switching to colour frame buffer device 170x48
>> [   13.007758] i915 0000:00:02.0: fb0: inteldrmfb frame buffer device
>> [   13.007760] i915 0000:00:02.0: registered panic notifier
>> [   13.009289] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0
>> [   13.812079] [drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off
>> [  124.988792] i915 0000:00:02.0: setting latency timer to 64
>> [  124.994748] [drm] Wrong MCH_SSKPD value: 0x16040307
>> [  124.994749] [drm] This can cause pipe underruns and display issues.
>> [  124.994749] [drm] Please upgrade your BIOS to fix this.
>> [  126.654709] [drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off
>>
>> Please, have also a look at the attached files!
>>
>
> Hmm, BROKEN BIOS here?
>
> [   11.967307] [drm] Wrong MCH_SSKPD value: 0x16040307
> [   11.967310] [drm] This can cause pipe underruns and display issues.
> [   11.967311] [drm] Please upgrade your BIOS to fix this
>
> Samsung notebooks seems not to be a good choice these days :-)?
>
> I have checked last Tuesday the latest available firmware after
> upgrading win7 (MS patchday).
>
> Any other workaround I can do?

Nope, and as long as you don't have any underrun display issues
there's no need to do anything. This is pretty much just a note for us
developers for when people report bugs. Might be we want to tune this
down again.
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch