`vo=gpu` keeps dGPU awake while using the iGPU for hw decoding

mpv Information

mpv 0.39.0 Copyright © 2000-2024 mpv/MPlayer/mplayer2 projects
libplacebo version: v7.349.0
FFmpeg version: 7.1
FFmpeg library versions:
   libavcodec      61.3.100 (runtime 61.19.100)
   libavdevice     61.1.100 (runtime 61.3.100)
   libavfilter     10.1.100 (runtime 10.4.100)
   libavformat     61.1.100 (runtime 61.7.100)
   libavutil       59.8.100 (runtime 59.39.100)
   libswresample   5.1.100 (runtime 5.3.100)
   libswscale      8.1.100 (runtime 8.3.100)

Other Information

- Linux version:
NAME="Fedora Linux"
VERSION_CODENAME=""
PRETTY_NAME="Fedora Linux 41 (Workstation Edition)"
CPE_NAME="cpe:/o:fedoraproject:fedora:41"
DEFAULT_HOSTNAME="fedora"

- Kernel Version:
Linux sieger 6.13.5-200.fc41.x86_64 #1 SMP PREEMPT_DYNAMIC Thu Feb 27 15:07:31 UTC 2025 x86_64 GNU/Linux

- GPU Model:
06:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Cezanne [Radeon Vega Series / Radeon Vega Mobile Series] [1002:1638] (rev c6)
01:00.0 3D controller [0302]: NVIDIA Corporation GA107M [GeForce RTX 3050 Mobile] [10de:25a2] (rev a1)

- Mesa/GPU Driver Version:
GPU0 (radv): Mesa 25.0.0
GPU1 (NVIDIA): 570.86.16

- Window Manager and Version:
KDE Plasma Version: 6.3.1

- Source of mpv:
fedora repository

Reproduction Steps

On a laptop with an AMD iGPU + NVIDIA dGPU, play either a H.264 or HEVC file with mpv --no-config $file --hwdec=yes --log-file=log.txt.

Expected Behavior

Output of watch cat /sys/class/drm/card0/device/power_state should be D3cold while mpv is open.

Actual Behavior

Output of watch cat /sys/class/drm/card0/device/power_state is D0 while mpv is open.
Output of sudo lsof /dev/nvidia0 shows mpv opening 5 file descriptors.

Log File

log.txt

Sample Files

Big Buck Bunny

I carefully read all instruction and confirm that I did the following:

• I tested with the latest mpv version to validate that the issue is not already fixed.
• I provided all required information including system and mpv version.
• I produced the log file with the exact same set of files, parameters, and conditions used in "Reproduction Steps", with the addition of --log-file=output.txt.
• I produced the log file while the behaviors described in "Actual Behavior" were actively observed.
• I attached the full, untruncated log file.
• I attached the backtrace in the case of a crash.

Start by reproducing the issue with the provided mpv command on the AMD iGPU/NVIDIA dGPU setup, then inspect log.txt and the reported power-state and /dev/nvidia0 observations. Done means hardware decoding still works while the NVIDIA device remains in D3cold and mpv no longer opens the reported NVIDIA device descriptors.