From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [Bug 107898] "kfd: Failed to resume IOMMU for device 1002:15dd" on Raven Ridge Date: Thu, 13 Sep 2018 20:05:18 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0237453946==" Return-path: Received: from culpepper.freedesktop.org (culpepper.freedesktop.org [131.252.210.165]) by gabe.freedesktop.org (Postfix) with ESMTP id 765056E70D for ; Thu, 13 Sep 2018 20:05:18 +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 --===============0237453946== Content-Type: multipart/alternative; boundary="15368691181.E61fBC.30149" Content-Transfer-Encoding: 7bit --15368691181.E61fBC.30149 Date: Thu, 13 Sep 2018 20:05:18 +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=3D107898 --- Comment #7 from Felix Kuehling --- Good timing. We were just given a laptop that has similar problems and foun= d a partial workaround: Try adding "iommu=3Dpt" to your kernel command line. Th= is may at least get you through the KFD initialization, but there are likely more problems down the line. The problems are due to BIOS bugs. We're looking into more workarounds to ignore or patch incorrect information in the CRAT ACPI table that describes= the compute devices for KFD. --=20 You are receiving this mail because: You are the assignee for the bug.= --15368691181.E61fBC.30149 Date: Thu, 13 Sep 2018 20:05:18 +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 # 7 on bug 10789= 8 from Felix Kuehling 
Good timing. We were just given a laptop that has similar prob=
lems and found a
partial workaround: Try adding "iommu=3Dpt" to your kernel comman=
d line. This may
at least get you through the KFD initialization, but there are likely more
problems down the line.

The problems are due to BIOS bugs. We're looking into more workarounds to
ignore or patch incorrect information in the CRAT ACPI table that describes=
 the
compute devices for KFD.

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