From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [Bug 102646] Screen flickering under amdgpu-experimental [buggy auto power profile] Date: Sat, 30 Mar 2019 01:41:32 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0967416794==" Return-path: Received: from culpepper.freedesktop.org (culpepper.freedesktop.org [131.252.210.165]) by gabe.freedesktop.org (Postfix) with ESMTP id F0C406E520 for ; Sat, 30 Mar 2019 01:41:32 +0000 (UTC) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: dri-devel@lists.freedesktop.org List-Id: dri-devel@lists.freedesktop.org --===============0967416794== Content-Type: multipart/alternative; boundary="15539100928.BD06F9D.21368" Content-Transfer-Encoding: 7bit --15539100928.BD06F9D.21368 Date: Sat, 30 Mar 2019 01:41:32 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://bugs.freedesktop.org/ Auto-Submitted: auto-generated https://bugs.freedesktop.org/show_bug.cgi?id=3D102646 --- Comment #74 from bmilreu@gmail.com --- (In reply to Bastian from comment #73) > (In reply to Bastian from comment #69) > > Distro/Kernel: Ubuntu 18.04.2/5.0.2 > > GPU AMD: Readon RX570 - Mesa 19.0 > > Display: Iiyama G23530HSU 75hz > > Desktop: Gnome > >=20 > > video: https://www.youtube.com/watch?v=3DgNJ2kJ8hsHA > >=20 > > Have the same problem as the op. The problems started with the 4.20 Ker= nels. > > Had not this problem with 4.19 LTS Kernels. The flickering doesn't appe= ar on > > wayland if I choose only 60hz. On xorg it is irrelevant how much hz I u= se, > > it flickers regardless.=20 > >=20 > > sudo -i > > echo "manual" > > > /sys/class/drm/card0/device/power_dpm_force_performance_level=20 > > echo "2" > /sys/class/drm/card0/device/pp_dpm_mclk > >=20 > > Fixes the flickering. >=20 > Just a quick update. After switching from HDMI to DisplayPort the issue > resolved itself for me. That's interesting. It's the opposite for me - only DP flickers, not HDMI. Lots of people on reddit have been discovering this as they're coming from older kernels, only this week I've helped 4 different posters asking about = it. We'd like to hear anything from devs at this point so I'll CC this to AMD's= DC dev Nicholas Kazlauskas. --=20 You are receiving this mail because: You are the assignee for the bug.= --15539100928.BD06F9D.21368 Date: Sat, 30 Mar 2019 01:41:32 +0000 MIME-Version: 1.0 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://bugs.freedesktop.org/ Auto-Submitted: auto-generated

Comme= nt # 74 on bug 10264= 6 from bmilreu@gmail.co= m 
(In reply to Bastian from comment #73)
> (In reply to Bastian from comment #69)
> > Distro/Kernel: Ubuntu 18.04.2/5.0.2
> > GPU AMD:       Readon RX570 - Mesa 19.0
> > Display:       Iiyama G23530HSU  75hz
> > Desktop:       Gnome
> >=20
> > video: =
https://www.youtube.com/watch?v=3DgNJ2kJ8hsHA
> >=20
> > Have the same problem as the op. The problems started with the 4.=
20 Kernels.
> > Had not this problem with 4.19 LTS Kernels. The flickering doesn'=
t appear on
> > wayland if I choose only 60hz. On xorg it is irrelevant how much =
hz I use,
> > it flickers regardless.=20
> >=20
> > sudo -i
> > echo "manual" >
> > /sys/class/drm/card0/device/power_dpm_force_performance_level=20
> > echo "2" > /sys/class/drm/card0/device/pp_dpm_mclk
> >=20
> > Fixes the flickering.
>=20
> Just a quick update. After switching from HDMI to DisplayPort the issue
> resolved itself for me.

That's interesting. It's the opposite for me - only DP flickers, not HDMI.
Lots of people on reddit have been discovering this as they're coming from
older kernels, only this week I've helped 4 different posters asking about =
it.
We'd like to hear anything from devs at this point so I'll CC this to AMD's=
 DC
dev Nicholas Kazlauskas.

You are receiving this mail because:
  • You are the assignee for the bug.
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