2014-01-14 19:32:19

by bjoern

Subject: Kernel above 3.8 prevents booting Linux

I have an Ubuntu 12.04 x64 server. The hard disk is encrypted using LVM.

With kernel 3.8.8, the server works fine - I am asked to enter the
password and can boot the system.

Any kernel above 3.8, e.g. 3.9/3.11 (I didn't try many) prevents me from
entering the password. It seems the attached USB keyboard is no longer
being read from or the system is hanging.

I can however switch between the kernels in GRUB - it's only after the
kernel has been selected and the password screen is displayed that the
system hangs.

I'd like to help in nailing down the bug but I'm at a loss what to do
here as I can't get to any console or kernel logs.

Regards,
Bjoern

2014-01-14 19:52:18

by Jason Cooper

Subject: Re: Kernel above 3.8 prevents booting Linux

bjoern,

On Tue, Jan 14, 2014 at 08:32:10PM +0100, bjoern wrote:
> I have an Ubuntu 12.04 x64 server. The hard disk is encrypted using LVM.
>
> With kernel 3.8.8, the server works fine - I am asked to enter the
> password and can boot the system.
>
> Any kernel above 3.8, e.g. 3.9/3.11 (I didn't try many) prevents me from
> entering the password. It seems the attached USB keyboard is no longer
> being read from or the system is hanging.

Have you tried adding the usb keyboard module to
/etc/initramfs-tools/modules and rebuilding your initrds?

hth,

Jason.