So my new system (Threadripper 3970x on Gigabyte TRX40 AORUS MASTER) doesn't boot on Ubuntu 19.10 - it gets stuck at recognizing USB devices:
7-6 New USB device found, idVendor=05e3, idProduct=0608
7-6 New USB device strings: Mfr=0, Product=1, Serialnumber.....
7-6 Product: USB2.0 Hub
7-6:1.0: USB hub found
7-6:1.0: 4 ports detected
..then nothing happens. This is the same on booting from USB stick, normal boot and recovery mode.
I tried removing USB devices, but this hub seems to be on the motherboard. What can I do? Since I can't even enter recovery mode it seems a bit tricky to troubleshoot. Can I disable specific USB ports through GRUB maybe? Or is the listed USB entry not even the problem?