Another finding I'd like to share that temporarily "solves" this problem.
The Asus Z87 Maximus VI Formula board I have allows me to enable/disable USB controllers from the BIOS. I disabled the Asmedia USB3 controller and all the issues seem to go away: 1. laggy BIOS initialization 2. slow udev initialization 3. and USB devices not being available until after about 40-50 seconds after boot Since the controller winds up "dead" on reboots or power cycles without power cut, any device I connect to those USB ports don't work anyway. There is no point for me to use them for any devices. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1437492 Title: boot stalls on USB detection errors To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1437492/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
