Bug#1118349: dpm broken on Radeon HD 8570D

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From	Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Newsgroups	linux.debian.bugs.dist, linux.debian.kernel
Subject	Bug#1118349: dpm broken on Radeon HD 8570D
Date	Mon, 10 Nov 2025 16:30:01 +0100
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Hello,

A Debian user (Roman Savochenko, on Cc:) reports issues (freezing with
black screen) with a Radeon HD 8570D graphics adapter. When passing
`radeon.dpm=0` on the kernel commandline the problems are gone.

Is it a sensible quirk to let dpm default to 0 with that hardware? Or
does the behaviour depend on (e.g.) the actual monitor in use?

Or is there a bug to fix? If so, do you have a hint what to do, is there
more information needed from the affected system?

The full bug history is available at https://bugs.debian.org/1118349,
which also contains some hardware information.

Best regards
Uwe

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Bug#1118349: dpm broken on Radeon HD 8570D Uwe Kleine-König <u.kleine-koenig@baylibre.com> - 2025-11-10 16:30 +0100
  Bug#1118349: dpm broken on Radeon HD 8570D Roman Savochenko <roman@oscada.org> - 2025-11-19 20:40 +0100
  Bug#1118349: dpm broken on Radeon HD 8570D Roman Savochenko <roman@oscada.org> - 2025-11-22 13:50 +0100

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