From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [Bug 96868] AMDGPU Tonga only does 2560x1440 at 120hz, switching to 144hz causes display errors, same thing used to happen with fglrx. Date: Sat, 10 Nov 2018 18:48:05 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0610336869==" Return-path: Received: from culpepper.freedesktop.org (culpepper.freedesktop.org [IPv6:2610:10:20:722:a800:ff:fe98:4b55]) by gabe.freedesktop.org (Postfix) with ESMTP id 6501E6E12B for ; Sat, 10 Nov 2018 18:48:05 +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 --===============0610336869== Content-Type: multipart/alternative; boundary="15418756852.ae9cF3F2.24354" Content-Transfer-Encoding: 7bit --15418756852.ae9cF3F2.24354 Date: Sat, 10 Nov 2018 18:48:05 +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=3D96868 --- Comment #34 from bmilreu@gmail.com --- (In reply to Mike Bendel from comment #33) > I'm also experiencing the same issues, but on much lower refresh rates. I > have a 3840x1600 monitor (LG 38UC99) and when running at 75Hz, display > corruption is observed on both AMD GPUs I have, a Radeon Pro WX 5100 and > Radeon RX 550. >=20 > Fortunately, setting the power level to high makes the display corruption= go > away entirely, but also raises temperatures substantially. The idle temp = on > my WX 5100 gets up to 60 C by doing that. >=20 > Is there a way to lower the clocks in the high performance state? I know > some utilities like MSI Afterburner allow for this in Windows, but I'm n= ot > sure how to do it on Linux. Those two commands will force only the mclk to high state, which should get= rid of the bug and for me the temperature difference then is negligible compare= d to forcing both clocks to high. echo "manual" > /sys/class/drm/card0/device/power_dpm_force_performance_lev= el echo "2" > /sys/class/drm/card0/device/pp_dpm_mclk --=20 You are receiving this mail because: You are the assignee for the bug.= --15418756852.ae9cF3F2.24354 Date: Sat, 10 Nov 2018 18:48:05 +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

Commen= t # 34 on bug 96868<= /a> from bmilreu@gmail.co= m 
(In reply to Mike Bendel from comment #33)
> I'm also experiencing the same issues, but on mu=
ch lower refresh rates. I
> have a 3840x1600 monitor (LG 38UC99) and when running at 75Hz, display
> corruption is observed on both AMD GPUs I have, a Radeon Pro WX 5100 a=
nd
> Radeon RX 550.
>=20
> Fortunately, setting the power level to high makes the display corrupt=
ion go
> away entirely, but also raises temperatures substantially. The idle te=
mp on
> my WX 5100 gets up to 60 C by doing that.
>=20
> Is there a way to lower the clocks in the high performance state? I kn=
ow
> some  utilities like MSI Afterburner allow for this in Windows, but I'=
m not
> sure how to do it on Linux.

Those two commands will force only the mclk to high state, which should get=
 rid
of the bug and for me the temperature difference then is negligible compare=
d to
forcing both clocks to high.

echo "manual" > /sys/class/drm/card0/device/power_dpm_force_pe=
rformance_level
echo "2" >  /sys/class/drm/card0/device/pp_dpm_mclk

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