Hi. I solved a problem and wanted to share. I still wonder why it happend.
I had power problem with fuse on my electricity circuit in my home due to kitchen kettle that broke.
That created a BIOS problem that I couldnt start my laptop. It froze on startup with dell logo and yellow “Diagnostic boot selected”. Nothing worked. Crtl+esc with “boot self heal” with usb driver also.
So I decided to strip my Dell Latitude E5470 (qubes works on it with minor issues) and unconnected CMOS battery. After putting it back, I made it run.
Qubes wrongly attached my wifi card and I didnt had sys-net as it tried to run
Network controller [0280]: Intel Corporation Wireless 8260 [8086:24f3]
as PCI device dom0:00_1f.6 and couldnt find it. Its now dom0:01_00.0.
I think now that could be issued by removing unused WWAN card.
lspci and qvm-pci didnt showed any 1f.6 device. So what I did was this
qvm-pci detach sys-net dom0:00_1f.6
and it helped! It must have been somewhere deep.