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

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Date:   Wed, 14 Sep 2016 13:32:59 +0200
From:   Martin Steigerwald <martin@...htvoll.de>
To:     Jani Nikula <jani.nikula@...ux.intel.com>
Cc:     Pavel Machek <pavel@....cz>,
        kernel list <linux-kernel@...r.kernel.org>,
        daniel.vetter@...el.com, intel-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org,
        "Rafael J. Wysocki" <rjw@...ysocki.net>
Subject: Re: 4.8-rc1: it is now common that machine needs re-run of xrandr after resume

Am Mittwoch, 14. September 2016, 12:17:53 CEST schrieb Jani Nikula:
> On Wed, 14 Sep 2016, Pavel Machek <pavel@....cz> 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?

According to zgrep "EDID" /var/log/kern* I don´t have any EDID related error 
messages. I am using DisplayPort cable via ThinkPad Minidock Plus (dock for 
ThinkPad T520) or what it was named.

-- 
Martin