Created attachment 286009 [details]
Runpm is doesn't work on laptops with an Nvidia GPU and the Intel bridge controller with the PCI device ID 0x1901.
This issue was a discussed a lot on mailing lists and I will dump information here as I go.
Created attachment 286011 [details]
Created attachment 286013 [details]
Created attachment 286015 [details]
acpidump of the XPS 9560
Created attachment 286023 [details]
lspci -s 00:01.0 -vv
fixed in 5.7-rc1