System unable to finish loading with the current HEAD

[Petr Janda]

Hi,
Im unable to boot my workstation with the current HEAD kernel. The boot 
seems to go ok up untill

uhub2: port error, restarting port 1
uhub2: port error, giving up port 1

And then it just restarts without any panic. Any advise on how to debug it?

Cheers,
Petr