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: Thu, 13 Jul 2017 03:08:28 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0466092295==" Return-path: Received: from culpepper.freedesktop.org (culpepper.freedesktop.org [131.252.210.165]) by gabe.freedesktop.org (Postfix) with ESMTP id 4C5386E54D for ; Thu, 13 Jul 2017 03:08:28 +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 --===============0466092295== Content-Type: multipart/alternative; boundary="14999153083.1fdcda.6597"; charset="UTF-8" --14999153083.1fdcda.6597 Date: Thu, 13 Jul 2017 03:08:28 +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 #30 from almoped@gmail.com --- Testing stable linux 4.12.1 was a mixed bag. 2560x1440p@143.9Hz no longer flickers or causes display corruption, but graphics memory run at full speed and card heats up. It would seem any refresh rate above 60Hz; i.e. 100, 120= and 144 all made the memory run full speed. Testing DAL-wip with linux 4.9.0 show 144Hz and 143.9Hz display a nearly perfect picture. There is display corruption on the last ~80 pixels of the second last row of the picture. (Current win10 drivers have the same corruption) But this was all with MCLK at the lowest state, 150MHz. Back on linux 4.12.1, editing amdgpu to test disable_mclk_switching=3D0 and setting 143.9Hz everything seems fine: no corruption anywhere, card at 150M= Hz and less heat generated. It would seem something, not related to mclk, has been fixed since I report= ed this bug for linux 4.6.3. Setting 144Hz, as KDE allows, still causes massive flicker and corruption. Selecting 143.9Hz results in a stable picture, with no corruption and simil= ar to what fglrx used to display. --=20 You are receiving this mail because: You are the assignee for the bug.= --14999153083.1fdcda.6597 Date: Thu, 13 Jul 2017 03:08:28 +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 # 30 on bug 96868<= /a> from almoped@gmail.co= m 
Testing stable linux 4.12.1 was a mixed bag. 2560x1440p@143.9Hz no longer
flickers or causes display corruption, but graphics memory run at full speed
and card heats up. It would seem any refresh rate above 60Hz; i.e. 100, 120=
 and
144 all made the memory run full speed.

Testing DAL-wip with linux 4.9.0 show 144Hz and 143.9Hz display a nearly
perfect picture. There is display corruption on the last ~80 pixels of the
second last row of the picture. (Current win10 drivers have the same
corruption) But this was all with MCLK at the lowest state, 150MHz.

Back on linux 4.12.1, editing amdgpu to test disable_mclk_switching=3D0 and
setting 143.9Hz everything seems fine: no corruption anywhere, card at 150M=
Hz
and less heat generated.

It would seem something, not related to mclk, has been fixed since I report=
ed
this bug for linux 4.6.3.

Setting 144Hz, as KDE allows, still causes massive flicker and corruption.
Selecting 143.9Hz results in a stable picture, with no corruption and simil=
ar
to what fglrx used to display.

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