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.
** No longer affects: friendly-recovery (Ubuntu)
** Package changed: systemd (Ubuntu) => linux (Ubuntu)
** Changed in: linux (Ubuntu)
Status: New => Incomplete
** Summary changed:
- systemd-udev-settle stalls booting
+ boot stalls on USB detection errors
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https://bugs.launchpad.net/bugs/1437492
Title:
boot stalls on USB detection errors
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