Ubuntu
initramfs-tools package

  1. Bug #1879987
  2. Comment #0

Comment 0 for bug 1879987

Revision history for this message
Eric Desrochers (slashd) wrote : kernel get stuck at boot if specified 'console=ttyS* ' doesn't exist.

kernel get stucks at boot if console=ttyS* is specified in the kernel cmdling and that serial HW isn't available on the system.

Reproduced using Ubuntu kernel (Bionic/v4.15) and mainline kernel v5.6 for now.

Removing the non-existent 'console=ttyS*' fixes the situation.

I tested it using KVM/qemu, but it has been brought to my attention that it was reproducible in VMware as well.

I think it is safe to say that it is unlikely to be specifics to a certain virtualization technology type.

Didn't test on baremetal, but I would suspect the same behaviour (until I'm proving wrong).