The Quanta give me hits about error and it seems that in 68 reboot cycles there are 11 times which can't detected out the usb keyboard.
$ grep 'Command line' kern.log |wc 68 952 12988 $ grep "usb1-port2: couldn't allocate usb_device" kern.log |wc 11 132 1199 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1869138 Title: The keyboard does not have responeded when boot system into Ubuntu 18.04.4 with HWE(Legacy Mode) on Quanta server To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-hwe/+bug/1869138/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs