linux-kernel - Re: [PATCH] Input: adbhid - fix capslock key state after suspend

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Date:	Thu, 10 Apr 2008 11:59:30 +0200
From:	Rodney Lorrimar <rodney@...ney.id.au>
To:	Pavel Machek <pavel@...e.cz>
Cc:	jikos@...e.cz, linux-kernel@...r.kernel.org,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Andrew McNabb <amcnabb@...abbs.org>
Subject: Re: [PATCH] Input: adbhid - fix capslock key state after suspend

On Fri, Mar 28, 2008 at 11:58:55AM +0100, Pavel Machek wrote:
> On Fri 2008-03-28 01:15:56, Rodney Lorrimar wrote:
> > If the adbhid module parameter restore_capslock_events is used,
> > sometimes capslock will get stuck down after resuming.
> 
> Hmmm, why does that need to be a parameter? I mean... can we just do
> the right thing?

Hi Pavel,

Sorry for taking so long to answer your questions. We can mostly do
the right thing. I suppose it was a parameter so the quirk fixing
didn't ruin the fun for the majority of users who don't remap their
capslock. I know of two issues with the code:

1. Under heavy capslock usage the capslock key will sometimes get
   stuck down.
2. If the capslock LED is on and the power button is pressed, a "power
   button release" key event won't happen until capslock is pressed
   again. So in some situations (e.g. with pbbuttonsd) the next time
   capslock is hit the machine will suspend.

I will send a patch for 2, and continue to investigate 1.

Regarding the original patch, I think it's worth applying. If 1 is
fixable then I will prepare two more patches to fix problem 1 and
remove the parameter.

Rodney

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