From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [Bug 105971] DVI port is not detecting connected monitor with 4.16.0+ kernel and amdgpu.dc=1 set Date: Tue, 10 Apr 2018 12:50:12 +0000 Message-ID: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============2143728931==" Return-path: Received: from culpepper.freedesktop.org (culpepper.freedesktop.org [131.252.210.165]) by gabe.freedesktop.org (Postfix) with ESMTP id 7D7156E400 for ; Tue, 10 Apr 2018 12:50:12 +0000 (UTC) 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 --===============2143728931== Content-Type: multipart/alternative; boundary="15233646120.Cef071e9D.11176" Content-Transfer-Encoding: 7bit --15233646120.Cef071e9D.11176 Date: Tue, 10 Apr 2018 12:50:12 +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=3D105971 Bug ID: 105971 Summary: DVI port is not detecting connected monitor with 4.16.0+ kernel and amdgpu.dc=3D1 set Product: DRI Version: unspecified Hardware: x86-64 (AMD64) OS: Linux (All) Status: NEW Severity: normal Priority: medium Component: DRM/AMDgpu Assignee: dri-devel@lists.freedesktop.org Reporter: sass.joel@gmail.com Created attachment 138731 --> https://bugs.freedesktop.org/attachment.cgi?id=3D138731&action=3Dedit dmesg output from amdgpu.dc=3D0 switch Hello. I'm trying to get 4 monitors working on the same desktop. Video card= is a Radeon RX560. root@nope:/tmp# lsb_release -a LSB Version:=20=20=20 core-9.20160110ubuntu0.2-amd64:core-9.20160110ubuntu0.2-noarch:security-9.2= 0160110ubuntu0.2-amd64:security-9.20160110ubuntu0.2-noarch Distributor ID: Ubuntu Description: Ubuntu 16.04.4 LTS Release: 16.04 Codename: xenial root@nope:/tmp# uname -a Linux nope 4.16.0+ #1 SMP Mon Apr 2 15:52:14 CEST 2018 x86_64 x86_64 x86_64 GNU/Linux With kernel switch amdgpu.dc=3D1, DVI port doesn't detected connected monit= or, but displayport MST is detected and utilized properly, allowing me to output video to three monitors from a single displayport. With kernel switch amdgpu.dc=3D0, DVI port properly detects connected monit= or, but displayport MST is not detected. Instead, displayport MST acts as a sin= gle output, and video output is mirrored to all three connected monitors. This appears to be a kernel issue. Kernel was retrieved from git repo github.com/M-Bab/linux-kernel-amdgpu-binaries I'm running the AMDGPU.UBUNTU kernel on that repo. I'll attach dmesg, xrandr and Xorg.0.log output from both kernel switches.= =20 I'm running amdgpu.dc_log=3D1 kernel switch for verbose logging. --=20 You are receiving this mail because: You are the assignee for the bug.= --15233646120.Cef071e9D.11176 Date: Tue, 10 Apr 2018 12:50:12 +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
Bug ID 105971
Summary DVI port is not detecting connected monitor with 4.16.0+ kern= el and amdgpu.dc=3D1 set
Product DRI
Version unspecified
Hardware x86-64 (AMD64)
OS Linux (All)
Status NEW
Severity normal
Priority medium
Component DRM/AMDgpu
Assignee dri-devel@lists.freedesktop.org
Reporter sass.joel@gmail.com 

Created a=
ttachment 138731 [details]
dmesg output from amdgpu.dc=3D0 switch

Hello. I'm trying to get 4 monitors working on the same desktop. Video card=
 is
a Radeon RX560.

root@nope:/tmp# lsb_release -a
LSB Version:=20=20=20
core-9.20160110ubuntu0.2-amd64:core-9.20160110ubuntu0.2-noarch:security-9.2=
0160110ubuntu0.2-amd64:security-9.20160110ubuntu0.2-noarch
Distributor ID: Ubuntu
Description:    Ubuntu 16.04.4 LTS
Release:        16.04
Codename:       xenial

root@nope:/tmp# uname -a
Linux nope 4.16.0+ #1 SMP Mon Apr 2 15:52:14 CEST 2018 x86_64 x86_64 x86_64
GNU/Linux

With kernel switch amdgpu.dc=3D1, DVI port doesn't detected connected monit=
or,
but displayport MST is detected and utilized properly, allowing me to output
video to three monitors from a single displayport.

With kernel switch amdgpu.dc=3D0, DVI port properly detects connected monit=
or,
but displayport MST is not detected. Instead, displayport MST acts as a sin=
gle
output, and video output is mirrored to all three connected monitors.

This appears to be a kernel issue. Kernel was retrieved from git repo
github.com/M-Bab/linux-kernel-amdgpu-binaries

I'm running the AMDGPU.UBUNTU kernel on that repo.

I'll attach dmesg, xrandr and Xorg.0.log output from both kernel switches.=
=20

I'm running amdgpu.dc_log=3D1 kernel switch for verbose logging.

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