linux-kernel - Kernel above 3.8 prevents booting Linux

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Message-ID: <20140114203210.76eeed0d@ubuntu>
Date:	Tue, 14 Jan 2014 20:32:10 +0100
From:	bjoern <lkml@...l-home.ch>
To:	linux-kernel@...r.kernel.org
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
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