Bug#1136127: linux-image-amd64: HDMI monitor flickers black during video playback after upgrade to Trixie

Path	csiph.com!weretis.net!feeder8.news.weretis.net!news.samoylyk.net!gothmog.csi.it!bofh.it!news.nic.it!robomod
From	Klaus Singvogel <klaus@singvogel.net>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#1136127: linux-image-amd64: HDMI monitor flickers black during video playback after upgrade to Trixie
Date	Sun, 10 May 2026 00:00:01 +0200
Message-ID	<MSXSh-3Wzn-3@gated-at.bofh.it> (permalink)
X-Mailbox-Line	From debian-bugs-dist-request@lists.debian.org Sat May 9 21:53:08 2026
Old-Return-Path	<debbugs@buxtehude.debian.org>
X-Spam-Flag	NO
X-Spam-Score	-1.651
Reply-To	Klaus Singvogel <klaus@singvogel.net>, 1136127@bugs.debian.org
Resent-To	debian-bugs-dist@lists.debian.org
Resent-Cc	klaus@singvogel.net, debian-kernel@lists.debian.org
X-Debian-Pr-Message	report 1136127
X-Debian-Pr-Package	linux-image-amd64
X-Debian-Pr-Source	linux, linux-latest, linux-latest-2.6, linux-signed-amd64
Content-Type	text/plain; charset="utf-8"
MIME-Version	1.0
Content-Transfer-Encoding	base64
X-Mailer	reportbug 13.2.0
X-Debian-Message	from BTS
X-Mailing-List	<debian-bugs-dist@lists.debian.org> archive/latest/1968826
List-ID	<debian-bugs-dist.lists.debian.org>
List-URL	<https://lists.debian.org/debian-bugs-dist/>
Approved	robomod@news.nic.it
Lines	36
Organization	linux.* mail to news gateway
Sender	robomod@news.nic.it
X-Original-Date	Sat, 09 May 2026 23:51:17 +0200
X-Original-Message-ID	<177836347714.3808.11293548776306713907.reportbug@dipper.ks5.de>
Xref	csiph.com linux.debian.bugs.dist:1292983 linux.debian.kernel:92426

Cross-posted to 2 groups.

Show key headers only | View raw

Package: linux-image-amd64
Version: 6.12.86-1
Severity: important

Dear Maintainer,

*** Reporter, please consider answering these questions, where appropriate ***

   * What led up to the situation?
     I upgraded my system from Debian Bookworm to Debian Trixie three days ago.
     My system uses an AMD Ryzen 7 5700G with integrated Radeon Graphics and
     two identical monitors, one connected via HDMI and one via DisplayPort.

     I tested with kernel versions 6.12.85-1 and 6.12.86-1 on Trixie. The issue
     occurs with both kernels.
     The problem was not present on Debian Bookworm.

   * What exactly did you do (or not do) that was effective (or
     ineffective)?

     I started video playback on the HDMI-connected monitor using VLC and
     Firefox (YouTube).

     Moving the video window from the HDMI monitor to the DisplayPort monitor
     stops the problem. The issue does not occur on the DisplayPort-connected
     monitor.

   * What was the outcome of this action?

     During video playback on the HDMI monitor, the screen repeatedly turns
     black for about 4–6 seconds, then becomes visible again for 4–6 seconds,
     and continues cycling like this.

   * What outcome did you expect instead?

     Video playback should work normally on both monitors without the HDMI
     monitor turning black.

*** End of the template - remove these template lines ***


-- System Information:
Debian Release: 13.4
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 6.12.86+deb13-amd64 (SMP w/16 CPU threads; PREEMPT)
Locale: LANG=en_US.utf8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages linux-image-amd64 depends on:
ii  linux-image-6.12.86+deb13-amd64  6.12.86-1

linux-image-amd64 recommends no packages.

linux-image-amd64 suggests no packages.

-- no debconf information

Back to linux.debian.kernel | Previous | Next — Next in thread | Find similar

Thread

Bug#1136127: linux-image-amd64: HDMI monitor flickers black during video playback after upgrade to Trixie Klaus Singvogel <klaus@singvogel.net> - 2026-05-10 00:00 +0200
  Bug#1136127: linux-image-amd64: HDMI monitor flickers black during video playback after upgrade to Trixie Salvatore Bonaccorso <carnil@debian.org> - 2026-05-10 10:20 +0200
  Processed: Re: Bug#1136127: linux-image-amd64: HDMI monitor  flickers black during video playback after upgrade to Trixie "Debian Bug Tracking System" <owner@bugs.debian.org> - 2026-05-10 10:20 +0200

csiph-web