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: Fri, 16 Aug 2019 10:10:26 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0260218080==" Return-path: Received: from culpepper.freedesktop.org (culpepper.freedesktop.org [131.252.210.165]) by gabe.freedesktop.org (Postfix) with ESMTP id 5B86C6E2DF for ; Fri, 16 Aug 2019 10:10:26 +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 --===============0260218080== Content-Type: multipart/alternative; boundary="15659502262.3BeFD971A.18513" Content-Transfer-Encoding: 7bit --15659502262.3BeFD971A.18513 Date: Fri, 16 Aug 2019 10:10:26 +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 #102 from Tom B --- > Grasping at straws a bit here, but it occurred to me that maybe Linux ker= nel testing on Radeon VII was done on an early VBIOS that didn't have full = UEFI support yet. We know that AMD had to issue a VBIOS update for Radeon V= II to fix UEFI support shortly after the launch. So maybe enabling the CSM/= Legacy Support in the BIOS, which does impact early GPU initialization, mig= ht have some effect on the multimonitor problem? Something I plan to test, = but I wanted to share the idea in case someone else has a chance first. I had already tried that unfortunately, I tried the following BIOS options: CSM on/off IOMMU on/of PCIE speed 16x/4x (the only options my motherboard allowed for some reason) Having said that, I didn't try booting using grub in BIOS mode as I didn't want to change my partition table, so it's possible that although I had used CSM, it was only legacy support and still booting in UEFI mode. --=20 You are receiving this mail because: You are the assignee for the bug.= --15659502262.3BeFD971A.18513 Date: Fri, 16 Aug 2019 10:10:26 +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 # 102 on bug 11067= 4 from Tom = B 
> Grasping at straws a bit here, but =
it occurred to me that maybe Linux kernel testing on Radeon VII was done on=
 an early VBIOS that didn't have full UEFI support yet. We know that AMD ha=
d to issue a VBIOS update for Radeon VII to fix UEFI support shortly after =
the launch. So maybe enabling the CSM/Legacy Support in the BIOS, which doe=
s impact early GPU initialization, might have some effect on the multimonit=
or problem? Something I plan to test, but I wanted to share the idea in cas=
e someone else has a chance first.

I had already tried that unfortunately, I tried the following BIOS options:

CSM on/off
IOMMU on/of
PCIE speed 16x/4x (the only options my motherboard allowed for some reason)

Having said that, I didn't try booting using grub in BIOS mode as I  didn't
want to change my partition table, so it's possible that although I had used
CSM, it was only legacy support and still booting in UEFI mode.

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