From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [Bug 110674] Crashes / Resets From AMDGPU / Radeon VII Date: Sun, 25 Aug 2019 23:01:48 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1228687754==" Return-path: Received: from culpepper.freedesktop.org (culpepper.freedesktop.org [131.252.210.165]) by gabe.freedesktop.org (Postfix) with ESMTP id DF5DB6E139 for ; Sun, 25 Aug 2019 23:01:47 +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 --===============1228687754== Content-Type: multipart/alternative; boundary="15667741070.cc5eeb.579" Content-Transfer-Encoding: 7bit --15667741070.cc5eeb.579 Date: Sun, 25 Aug 2019 23:01:47 +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=3D110674 --- Comment #118 from ReddestDream --- So, this is a crazy idea, but ironically I think it might be getting closer= to the truth. Tom B. attempted reverting ad51c46eec739c18be24178a30b47801b10e0357, which = was known to cause some issue with an RX 580. He found that doing so fixed the multimonitor crash but locked the card to the lowest possible memory speed, which really isn't acceptable. Perhaps our issue seem is connected to insufficient or improperly calculated PCIe bandwidth/speed. Speed mismatches can and will cause messages to not go through to the peripheral. It's also well-known that Radeon VII was origina= lly a PCIe 4.0 card that AMD locked down to the 3.0 speeds . . . What if when using multiple monitors and/or higher clock speeds Radeon VII = uses more bandwidth than Linux expects, causing the loss of communication? Something else I plan to investigate. --=20 You are receiving this mail because: You are the assignee for the bug.= --15667741070.cc5eeb.579 Date: Sun, 25 Aug 2019 23:01:47 +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 # 118 on bug 11067= 4 from ReddestDream 
So, this is a crazy idea, but ironically I think it might be g=
etting closer to
the truth.

Tom B. attempted reverting ad51c46eec739c18be24178a30b47801b10e0357, which =
was
known to cause some issue with an RX 580. He found that doing so fixed the
multimonitor crash but locked the card to the lowest possible memory speed,
which really isn't acceptable.

Perhaps our issue seem is connected to insufficient or improperly calculated
PCIe bandwidth/speed. Speed mismatches can and will cause messages to not go
through to the peripheral. It's also well-known that Radeon VII was origina=
lly
a PCIe 4.0 card that AMD locked down to the 3.0 speeds . . .

What if when using multiple monitors and/or higher clock speeds Radeon VII =
uses
more bandwidth than Linux expects, causing the loss of communication?

Something else I plan to investigate.

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