linux-kernel - nouveau "eDP-1: EDID is invalid" regression after 4.11 with HP ZBook 15 G3

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Date:   Wed, 10 May 2017 11:24:14 +0300
From:   Tommi Rantala <tt.rantala@...il.com>
To:     DRI Development <dri-devel@...ts.freedesktop.org>,
        nouveau@...ts.freedesktop.org
Cc:     Ben Skeggs <bskeggs@...hat.com>, David Airlie <airlied@...ux.ie>,
        LKML <linux-kernel@...r.kernel.org>
Subject: nouveau "eDP-1: EDID is invalid" regression after 4.11 with HP ZBook
 15 G3

Hi,

The HP ZBook 15 G3 laptop builtin display (eDP-1) does not work
correctly with v4.11-11413-g2868b25.

When booting the laptop, the resolution seems to be limited to
1024x768, and gnome-session segfaults.

Up to 4.11 the display works just fine in 1920x1080 mode.

I'm seeing this in the kernel logs:

nouveau 0000:01:00.0: eDP-1: EDID is invalid:
        [00] BAD  00 ff ff ff ff ff ff 00 ff ff ff ff ff ff ff ff
        [00] BAD  ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
        [00] BAD  ff ff ff ff ff ff ff ff ff ff ff ff ff 84 53 54
        [00] BAD  66 69 50 55 57 66 74 49 48 ff ff ff ff ff ff ff
        [00] BAD  ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
        [00] BAD  ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
        [00] BAD  ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
        [00] BAD  ff ff ff ff ff ff ff ff ff ff ff 00 00 ff 00 ff
nouveau 0000:01:00.0: DRM: DDC responded, but no EDID for eDP-1
[drm] Cannot find any crtc or sizes - going 1024x768


$ lspci | grep NVIDIA
01:00.0 VGA compatible controller: NVIDIA Corporation GM107GLM [Quadro
M2000M] (rev a2)

Any ideas, or should I bisect?

4.11 dmesg & xrandr output:
https://pastebin.com/raw/P9LGP7e1

4.11-11413-g2868b25 dmesg:
https://pastebin.com/raw/QBT9mMua

-Tommi