Description of problem:
After upgrading from kernel 5.2.17 to 5.3.6/5.3.7 the fan of my laptop Dell XPS17 does not stop. I'm pretty sure that I'm hit by the very same issue reported against Arch Linux https://bbs.archlinux.org/viewtopic.php?id=249330
Version-Release number of selected component (if applicable):
linux 5.3.6-200.fc30.x86_64
How reproducible:
Alway with kernel 5.3.
Steps to Reproduce:
1. Just boot the kernel 5.3.x
2.
3.
Actual results:
Fan does not stop.
Expected results:
Fan only runs on hight CPU or GPU usage.
Additional info:
With kernel 5.3 a new pci device pops up and does not get powered down.
# cat /sys/kernel/debug/vgaswitcheroo/switch
0:IGD:+:Pwr:0000:00:02.0
1:DIS: :DynPwr:0000:01:00.0
2:DIS-Audio: :DynPwr:0000:01:00.1
Removing it helps temporarily
# echo 1 > /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.1/remove
# cat /sys/kernel/debug/vgaswitcheroo/switch
0:IGD:+:Pwr:0000:00:02.0
1:DIS: :DynOff:0000:01:00.0