Bug#1118349: dpm broken on Radeon HD 8570D

["Deucher, Alexander" <Alexander.Deucher@amd.com>]

[Public]

> -----Original Message-----
> From: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
> Sent: Monday, November 10, 2025 10:27 AM
> To: Deucher, Alexander <Alexander.Deucher@amd.com>; Koenig, Christian
> <Christian.Koenig@amd.com>
> Cc: amd-gfx@lists.freedesktop.org; 1118349@bugs.debian.org; Roman
> Savochenko <roman@oscada.org>
> Subject: dpm broken on Radeon HD 8570D
>
> Control: forwarded -1 https://lore.kernel.org/amd-
> gfx/epyf7tdz3azb3fflb6rwuhax7mpccmqlsmzqqe2pcm7mxrdur4@zpx2uo5p
> voqs
>
> 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?

DPM worked fine on this hardware.  I'm not familiar with any general issues with it.  It may be system specific.

>
> 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.


If this is a regression can you bisect?

Thanks,

Alex

>
> Best regards
> Uwe