linux-kernel - Re: 2.6.28-rc4-mmotm1110 shift-lock oddness

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Date:	Tue, 18 Nov 2008 01:26:51 +0100 (CET)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Andrew Morton <akpm@...ux-foundation.org>
cc:	Valdis.Kletnieks@...edu, linux-kernel@...r.kernel.org,
	linux-input@...r.kernel.org, Dmitry Torokhov <dtor@...l.ru>
Subject: Re: 2.6.28-rc4-mmotm1110 shift-lock oddness

On Mon, 17 Nov 2008, Andrew Morton wrote:

> > Twice today, I've managed to get my laptop into an odd state where the keyboard
> > got quite confused:
> > 
> > 1) For the characters [a-z] the shift bit was *inverted* - if the shift-lock
> > LED was off, you'd get UPPER-case, and if it was on, you'd get lower-case.
> > 
> > 2) To add to the fun, the 0-9 keys were stuck shifted - I'd get the special
> > characters no matter what setting the shift or shift-lock key had.  I suspect
> > that the special-char keys like [{ and ;: were also stuck in shifted state,
> > but can't totally confirm it.
> > 
> > The previous two issues combined meant that I wasn't able to su or login
> > as root to do much of anything about it (guess who has special chars in their
> > root password? ;)
> > 
> > 3) ctl-alt-Fn to switch virtual consoles was spotty/erratic - one time
> > I was unable to use it at all, another time I was able to use c-a-F1 to get
> > to a green-screen console, but then F2 to get another one or F7 to get
> > back to the X server screen wouldn't work.
> > 
> > 4) Fortunately for my sanity, alt-sysrq was still working as advertised,
> > so I was able to reboot and thus clear the problem.
> > 
> > I was thinking this might be a simple "missed a key press/released" event
> > for a shift key, except that doesn't explain the numerics getting stuck shifted.
> > 
> > Any suggestions/hints for instrumentation/etc, in case I can replicate it
> > again?
> That's the first such report I've seen.  Let's add some cc's.

First, we'd need a little bit more information about the hardware in 
question, I guess.

What laptop is that, please? Is the keyboard PS/2-connected or 
USB-connected? Could you obtain evtest output from the buggy cases please?

-- 
Jiri Kosina
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