From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [Bug 110199] [amdgpu] Screen flickering when using a 75Hz monitor paired with an RX 480 GPU Date: Sun, 04 Aug 2019 21:33:44 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1973737553==" 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 C595689C9B for ; Sun, 4 Aug 2019 21:33:44 +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 --===============1973737553== Content-Type: multipart/alternative; boundary="15649544246.BfAA2a52E.10446" Content-Transfer-Encoding: 7bit --15649544246.BfAA2a52E.10446 Date: Sun, 4 Aug 2019 21:33:44 +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=3D110199 --- Comment #13 from 192k@protonmail.com --- I can confirm this issue exists on rx560 i have discovered a workaround,=20 if you copy the stock powerplaytable to a file with cat /sys/class/drm/card0/device/pp_table > pptable then load the stock pptable with sudo bash -c 'echo pptable > /sys/class/drm/card0/device/pp_table' the flickering goes away without having to lock the mclk to the highest sta= te it may also be related to https://bugs.freedesktop.org/show_bug.cgi?id=3D11= 0347 this bug. by default at boot the voltage for the highest pstate is the maximum allowa= ble voltage(1150mv) not the powerplay defined voltage of 1025mv, all other psta= tes are not effected this is also corrected after reloading the pptable manually. --=20 You are receiving this mail because: You are the assignee for the bug.= --15649544246.BfAA2a52E.10446 Date: Sun, 4 Aug 2019 21:33:44 +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 # 13 on bug 11019= 9 from 192k@protonm= ail.com 
I can confirm this issue exists on rx560

i have discovered a workaround,=20

if you copy the stock powerplaytable to a file with
cat /sys/class/drm/card0/device/pp_table > pptable

then load the stock pptable with

sudo bash -c 'echo pptable > /sys/class/drm/card0/device/pp_table'

the flickering goes away without having to lock the mclk to the highest sta=
te

it may also be related to https://bugs.freedesktop.org/show_bug.=
cgi?id=3D110347
this bug.
by default at boot the voltage for the highest pstate is the maximum allowa=
ble
voltage(1150mv) not the powerplay defined voltage of 1025mv, all other psta=
tes
are not effected

this is also corrected after reloading the pptable manually.

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