From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [Bug 109955] amdgpu [RX Vega 64] system freeze while gaming Date: Wed, 06 Nov 2019 10:23:39 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0933960504==" Return-path: Received: from culpepper.freedesktop.org (culpepper.freedesktop.org [131.252.210.165]) by gabe.freedesktop.org (Postfix) with ESMTP id B9DD86ECBA for ; Wed, 6 Nov 2019 10:23:39 +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 --===============0933960504== Content-Type: multipart/alternative; boundary="157303581911.bB185.9526" Content-Transfer-Encoding: 7bit --157303581911.bB185.9526 Date: Wed, 6 Nov 2019 10:23:39 +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=3D109955 --- Comment #128 from haro41@gmx.de --- Created attachment 145901 --> https://bugs.freedesktop.org/attachment.cgi?id=3D145901&action=3Dedit proposed fix for crashes, caused by frequent mclk level 0/1 switches At least one of the causes for crashes, are more frequently, if vsync is enabled.=20 In this case, memory clock levels are switched usually more frequently. By experiments i found, that especially the transient betweeen level 1 and level 0 is critical. The fact, that disabling memory level 0, helps as a workaround, confirms: this approach points in the right direction. Result of further experiments: By sending a 'PPSMC_MSG_SetUclkDownHyst' message to smc (enabling a hystere= se feature ?), the crashes can be avoided, even with enabled mclk level 0 and vsync activated. --=20 You are receiving this mail because: You are the assignee for the bug.= --157303581911.bB185.9526 Date: Wed, 6 Nov 2019 10:23:39 +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

Comm= ent # 128 on bug 10995= 5 from haro41@gmx.de 
Created attachment 145901 [details] [review]
proposed fix for crashes, caused by frequent mclk level 0/1 switches

At least one of the causes for crashes, are more frequently, if vsync is
enabled.=20

In this case, memory clock levels are switched usually more frequently.
By experiments i found, that especially the transient betweeen level 1 and
level 0 is critical. The fact, that disabling memory level 0, helps as a
workaround, confirms: this approach points in the right direction.

Result of further experiments:
By sending a 'PPSMC_MSG_SetUclkDownHyst' message to smc (enabling a hystere=
se
feature ?), the crashes can be avoided, even with enabled mclk level 0 and
vsync activated.

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