linux-kernel - Re: PROBLEM: 3.8.0-rc4 keyboard failure at boot

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Message-ID: <20130122134658.GA27683@16s.us>
Date:	Tue, 22 Jan 2013 08:46:58 -0500
From:	Brad Tilley <brad@....us>
To:	Jiri Kosina <jkosina@...e.cz>
Cc:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	linux-kernel@...r.kernel.org, linux-input@...r.kernel.org
Subject: Re: PROBLEM: 3.8.0-rc4 keyboard failure at boot

On Tue, Jan 22, 2013 at 01:42:54PM +0100, Jiri Kosina wrote:
> Could you please provide dmesg output from both working and non-working 
> case?

See attached. Two dmesgs from the same machine. One from 3.7.3, the other from 3.8-rc4 (with a ps2 keyboard). USB keyboards on this machine never work with 3.8, but always works with 3.7.

I used an old ps2 keyboard to enter the dm-crypt password. After that, the boot process continues and the USB keyboard and mouse become active and begin to work. However, USB keyboards do not work when the user is prompted to enter the dm-crypt decryption password early in the boot process. That's the primary issue. 

> Also /proc/bus/input/devices content would be interesting (in case you are 
> able to log remotely into the machine).

See attached. One from 3.7.3 the other from 3.8-rc4 (again, the 3.8 kernel is using a ps2 keyboard and a USB keyboard).

> Does replugging the keyboard fix the problem with 50% probability?

Replugging the keyboard does not fix the problem, nor does plugging it into different USB ports or swapping USB keyboards.

> Are other USB devices (such as mice) affected by this as well?

Users are attempting to enter the dm-crypt decryption password during boot so they have not noticed nor complained about mouse failure, only keyboard failure. 

Brad

View attachment "3.7.3-dmesg.txt" of type "text/plain" (46871 bytes)

View attachment "3.7.3-proc-bus-input-devices.txt" of type "text/plain" (2913 bytes)

View attachment "3.8-rc4-dmesg.txt" of type "text/plain" (43184 bytes)

View attachment "3.8-rc4-proc-bus-input-devices.txt" of type "text/plain" (3241 bytes)