From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [Bug 106846] RX480 with multiple HDMI ports shows monitor connected to unused port when using amdgpu.dc=1 Date: Thu, 07 Jun 2018 08:29:24 +0000 Message-ID: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1102836237==" Return-path: Received: from culpepper.freedesktop.org (culpepper.freedesktop.org [131.252.210.165]) by gabe.freedesktop.org (Postfix) with ESMTP id 331896F196 for ; Thu, 7 Jun 2018 08:29:25 +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 --===============1102836237== Content-Type: multipart/alternative; boundary="15283601650.80Fab9.17332" Content-Transfer-Encoding: 7bit --15283601650.80Fab9.17332 Date: Thu, 7 Jun 2018 08:29:25 +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=3D106846 Bug ID: 106846 Summary: RX480 with multiple HDMI ports shows monitor connected to unused port when using amdgpu.dc=3D1 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: tim@timcarr.me Created attachment 140060 --> https://bugs.freedesktop.org/attachment.cgi?id=3D140060&action=3Dedit 'xrandr -q' output with and without amdgpu.dc enabled. Card is an ASUS DUAL-RX480-04G. When booting with amdgpu.dc=3D1, as is defa= ult on 4.17+, the system shows a monitor on both HDMI ports when only one is connected. This causes a low-resolution login screen and requires disabling= the non-existent monitor to prevent some windows from being opened off screen. Attached is the 'xrandr -q' output from booting with and without amdgpu.dc enabled. Behavior is the same regardless of which HDMI port is used. --=20 You are receiving this mail because: You are the assignee for the bug.= --15283601650.80Fab9.17332 Date: Thu, 7 Jun 2018 08:29:25 +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 106846
Summary RX480 with multiple HDMI ports shows monitor connected to unu= sed port when using amdgpu.dc=3D1
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 tim@timcarr.me 

Created attachment 140060 [details]
'xrandr -q' output with and without amdgpu.dc enabled.

Card is an ASUS DUAL-RX480-04G. When booting with amdgpu.dc=3D1, as is defa=
ult on
4.17+, the system shows a monitor on both HDMI ports when only one is
connected. This causes a low-resolution login screen and requires disabling=
 the
non-existent monitor to prevent some windows from being opened off screen.

Attached is the 'xrandr -q' output from booting with and without amdgpu.dc
enabled. Behavior is the same regardless of which HDMI port is used.

You are receiving this mail because:
  • You are the assignee for the bug.
= --15283601650.80Fab9.17332-- --===============1102836237== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KZHJpLWRldmVs IG1haWxpbmcgbGlzdApkcmktZGV2ZWxAbGlzdHMuZnJlZWRlc2t0b3Aub3JnCmh0dHBzOi8vbGlz dHMuZnJlZWRlc2t0b3Aub3JnL21haWxtYW4vbGlzdGluZm8vZHJpLWRldmVsCg== --===============1102836237==--