Comment # 83
on bug 75985
from Przemysław Kopa
> Check the runtime PM status of the HDA: > grep . /sys/bus/pci/devices/0000:01:00.1/power/* This is the output of grep . /sys/bus/pci/devices/0000:01:00.1/power/*: /sys/bus/pci/devices/0000:01:00.1/power/async:enabled /sys/bus/pci/devices/0000:01:00.1/power/control:on /sys/bus/pci/devices/0000:01:00.1/power/runtime_active_kids:0 /sys/bus/pci/devices/0000:01:00.1/power/runtime_active_time:122453 /sys/bus/pci/devices/0000:01:00.1/power/runtime_enabled:forbidden /sys/bus/pci/devices/0000:01:00.1/power/runtime_status:active /sys/bus/pci/devices/0000:01:00.1/power/runtime_suspended_time:4310 /sys/bus/pci/devices/0000:01:00.1/power/runtime_usage:1 /sys/bus/pci/devices/0000:01:00.1/power/wakeup:disabled > Check if user space applications have opened the HDA: > lsof /dev/snd/controlC1 Output of lsof /dev/snd/controlC1 is empty. Normally I'm using pulseaudio and it grabs the card, but I uninstalled it for testing purposes and it doesn't make a difference - card stays enabled. Additionally, if I try to manually turn off dGPU using echo OFF > /sys/kernel/debug/vgaswitcheroo/switch, it does nothing.
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