[Intel-gfx] 4.2-rc4 kernel warnings on HSW laptop [regression]

[Jani Nikula]

On Tue, 13 Oct 2015, Ville Syrjälä <ville.syrjala at linux.intel.com> wrote:
> On Tue, Oct 13, 2015 at 10:24:58AM +0200, Daniel Vetter wrote:
>> On Mon, Oct 12, 2015 at 02:29:19PM +0200, Takashi Iwai wrote:
>> > On Mon, 12 Oct 2015 09:04:20 +0200,
>> > Daniel Vetter wrote:
>> > > 
>> > > Another pile of regressions for Jairo to track ...
>> > > 
>> > > On Sat, Oct 10, 2015 at 11:46:29AM +0200, Takashi Iwai wrote:
>> > > > Hi,
>> > > > 
>> > > > I noticed that a HSW laptop gets a few new warnings since 4.2-rc
>> > > > kernels.  One error messages pops at each boot time:
>> > > > 
>> > > >  Console: switching to colour dummy device 80x25
>> > > >  [drm] Replacing VGA console driver
>> > > >  [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
>> > > >  [drm] Driver supports precise vblank timestamp query.
>> > > >  vgaarb: device changed decodes: PCI:0000:00:02.0,olddecodes=io+mem,decodes=io+mem:owns=io+mem
>> > > >  [drm:drm_calc_timestamping_constants [drm]] *ERROR* crtc 21: Can't calculate constants, dotclock = 0!
>> > > 
>> > > There's patches for this one already, but I accidentally applied them for
>> > > -next, not -fixes. They should land for -rc6.
>> > 
>> > Could you point commit ids?
>> 
>> It was wishful thinking on my side, mixed them up with other patches. I
>> think this one's still open :(
>
> 7f4c628 drm/i915: Assign hwmode after encoder state readout
> 0f64614 drm/i915: Fix clock readout when pipes are enabled w/o ports
>
> not enough?

The relevant bug is [1], everyone please let's track this there.

BR,
Jani.


[1] https://bugs.freedesktop.org/show_bug.cgi?id=91428

>
> -- 
> Ville Syrjälä
> Intel OTC
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx at lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/intel-gfx

-- 
Jani Nikula, Intel Open Source Technology Center