Comment # 17 on bug 106597 from taijian@posteo.de

Created attachment 139692 [details]
dmesg with the debug symbols requested by Lukas

This is the 'vanilla' kernel with the extra patch for the debug symbols added
in.

Also, as requested:

$ cat /sys/bus/pci/devices/0000:01:00.1/power/runtime_status
active