From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [Bug 108934] [Dualscreen] "No signal" issues when booting with DVI and HDMI screens both plugged in Date: Mon, 03 Dec 2018 20:04:43 +0000 Message-ID: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0055320345==" Return-path: Received: from culpepper.freedesktop.org (culpepper.freedesktop.org [IPv6:2610:10:20:722:a800:ff:fe98:4b55]) by gabe.freedesktop.org (Postfix) with ESMTP id 99E3289E65 for ; Mon, 3 Dec 2018 20:04:43 +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 --===============0055320345== Content-Type: multipart/alternative; boundary="15438674830.4043.10328" Content-Transfer-Encoding: 7bit --15438674830.4043.10328 Date: Mon, 3 Dec 2018 20:04:43 +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=3D108934 Bug ID: 108934 Summary: [Dualscreen] "No signal" issues when booting with DVI and HDMI screens both plugged in 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: laurent.pointecouteau@gmail.com I'm using a AMD R9 380 video card on Arch Linux (with kernel 4.19.4 and the latest `mesa` package installed), and since several weeks, dualscreen has a buggy behavior. My Samsung TV displays "no signal" after booting while plug= ged in my computer (using a HDMI cable), and when trying to switch display modes using the GNOME control center (or the Super+P shortcut), my Iiyama ProLite B2475HDS DVI monitor gets randomly disabled and displays "no signal" too without ever recovering, forcing me to hard reboot. I've tried to apply a kernel patch as suggested in bug #108704, but it only removed the amdgpu-related error messages from dmesg, without fixing the dualscreen issues. Since then, I've found two workarounds: - putting the system to sleep then waking it up seems to restore normal functionality; - when booting with the HDMI cable unplugged, after plugging it in, screen switching is not buggy anymore. My setup does not allow me to safely downgrade to an older kernel, but I can confirm that the screen settings started to exhibit this buggy behaviour on= ly recently. --=20 You are receiving this mail because: You are the assignee for the bug.= --15438674830.4043.10328 Date: Mon, 3 Dec 2018 20:04:43 +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 108934
Summary [Dualscreen] "No signal" issues when booting with D= VI and HDMI screens both plugged in
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 laurent.pointecouteau@gmail.com 

I'm using a AMD R9 380 video card on Arch Linux (with kernel 4=
.19.4 and the
latest `mesa` package installed), and since several weeks, dualscreen has a
buggy behavior. My Samsung TV displays "no signal" after booting =
while plugged
in my computer (using a HDMI cable), and when trying to switch display modes
using the GNOME control center (or the Super+P shortcut), my Iiyama ProLite
B2475HDS DVI monitor gets randomly disabled and displays "no signal&qu=
ot; too
without ever recovering, forcing me to hard reboot.

I've tried to apply a kernel patch as suggested in bug #108704, but it only
removed the amdgpu-related error messages from dmesg, without fixing the
dualscreen issues. Since then, I've found two workarounds:
 - putting the system to sleep then waking it up seems to restore normal
functionality;
 - when booting with the HDMI cable unplugged, after plugging it in, screen
switching is not buggy anymore.

My setup does not allow me to safely downgrade to an older kernel, but I can
confirm that the screen settings started to exhibit this buggy behaviour on=
ly
recently.

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