Re: 4.8-rc1: it is now common that machine needs re-run of xrandr after resume

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On Thu, 15 Sep 2016, Martin Steigerwald <martin@xxxxxxxxxxxx> wrote:
> Am Mittwoch, 14. September 2016, 14:14:35 CEST schrieb Jani Nikula:
>> On Wed, 14 Sep 2016, Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx> wrote:
>> > On Wed, 14 Sep 2016, Pavel Machek <pavel@xxxxxx> wrote:
>> >> For the "sometimes need xrandr after resume": I don't think I can
>> >> bisect that. It only happens sometimes :-(. But there's something
>> >> helpful in the logs:
>> >> 
>> >> [ 1856.218863] [drm:drm_edid_block_valid] *ERROR* EDID checksum is
>> >> invalid, remainder is 130
>> >> [ 1856.218863] Raw EDID:
>> >> [ 1856.218863]     00 ff ff ff ff ff ff 00 ff ff ff ff ff ff ff ff
>> >> [ 1856.218863]     ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>> >> [ 1856.218863]     ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>> >> [ 1856.218863]     ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>> >> [ 1856.218863]     ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>> >> [ 1856.218863]     ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>> >> [ 1856.218863]     ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>> >> [ 1856.218863]     ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>> >> [ 1856.218863] [drm:drm_edid_block_valid] *ERROR* EDID checksum is
>> >> invalid, remainder is 130
>> >> [ 1856.218863] Raw EDID:
>> >> [ 1856.218863]     00 ff ff ff ff ff ff 00 ff ff ff ff ff ff ff ff
>> >> [ 1856.218863]     ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>> >> [ 1856.218863]     ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>> >> [ 1856.218863]     ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>> >> [ 1856.218863]     ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>> >> [ 1856.218863]     ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>> >> [ 1856.218863]     ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>> >> [ 1856.218863]     ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>> >> [ 1856.218863] [drm:drm_edid_block_valid] *ERROR* EDID checksum is
>> >> invalid, remainder is 130
>> >> [ 1856.218863] Raw EDID:
>> >> [ 1856.218863]     00 ff ff ff ff ff ff 00 ff ff ff ff ff ff ff ff
>> >> [ 1856.218863]     ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>> >> [ 1856.218863]     ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>> >> [ 1856.218863]     ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>> >> [ 1856.218863]     ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>> >> [ 1856.218863]     ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>> >> [ 1856.218863]     ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>> >> [ 1856.218863]     ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>> >> [ 1856.218863] [drm:drm_edid_block_valid] *ERROR* EDID checksum is
>> >> invalid, remainder is 130
>> >> [ 1856.218863] Raw EDID:
>> >> [ 1856.218863]     00 ff ff ff ff ff ff 00 ff ff ff ff ff ff ff ff
>> >> [ 1856.218863]     ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>> >> [ 1856.218863]     ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>> >> [ 1856.218863]     ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>> >> [ 1856.218863]     ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>> >> [ 1856.218863]     ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>> >> [ 1856.218863]     ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>> >> [ 1856.218863]     ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
>> >> [ 1856.218863] i915 0000:00:02.0: HDMI-A-1: EDID block 0 invalid.
>> > 
>> > Pavel, Martin, do you always see this when the display fails to resume?
>> > Is it HDMI/DVI for both of you?
>> 
>> Please try this patch, backported from our next.
>
> Was busy up to now, and weekend also quite full already.
>
> Thing is: I didn´t see this blank screen thing with 4.8-rc6 so far. And I did 
> not have above EDID stuff in my log either. So I first wait whether I see 
> blank screen again and if so, then know that a test would make sense. Maybe I 
> see it before I complete a rc7 or rc8 (if there will be one), then I would 
> include the patch of course.

N.b. it's entirely possible you and Pavel have different issues.

BR,
Jani.



-- 
Jani Nikula, Intel Open Source Technology Center
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