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

[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.

BR,
Jani.