Comment 2 for bug 1437492

Revision history for this message
Martin Pitt (pitti) wrote : Re: systemd-udev-settle stalls booting

The kernel log shows huge gaps in device detection, apparently the hardware gets locked up during USB detection/enumeration?

[ 7.292422] input: HDA Intel HDMI HDMI/DP,pcm=7 as /devices/pci0000:00/0000:00:03.0/sound/card0/input16
[ 10.918992] usb 1-3: device descriptor read/all, error -110
[ 11.031084] usb 1-3: new high-speed USB device number 3 using xhci_hcd
[ 21.173998] usb 1-3: device descriptor read/all, error -110
[ 21.286076] usb 1-3: new high-speed USB device number 4 using xhci_hcd
[ 26.309502] usb 1-3: device descriptor read/8, error -110
[ 31.436986] usb 1-3: device descriptor read/8, error -110
[ 31.653231] usb 1-3: new high-speed USB device number 5 using xhci_hcd
[ 36.676659] usb 1-3: device descriptor read/8, error -110
[ 41.804074] usb 1-3: device descriptor read/8, error -110
[ 41.908224] usb usb1-port3: unable to enumerate USB device
[ 42.020384] usb 1-9: new low-speed USB device number 6 using xhci_hcd

Could you try disconnecting as many USB devices as possible, see whether that helps, and then re-connect them one by one to see which one is the culprit? This might be a hardware or kernel bug, I don't know yet.