linux-kernel - Re: [regression] 2.6.30 leaking keys on console switch

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Date:	Thu, 15 Oct 2009 21:59:24 -0700
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Jiri Kosina <jkosina@...e.cz>, rjw@...k.pl,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	Mike Galbraith <efault@....de>
Subject: Re: [regression] 2.6.30 leaking keys on console switch

On Thu, Jul 16, 2009 at 11:24:06AM +0200, Andi Kleen wrote:
> > Andi, are you absolutely sure that this appeared between .29 and .30 for 
> > you?
> 
> I only noticed it after the .30 update at least.
> 
> > And if so, is there any chance you could try bisecting it?
> 
> Ok.
> 
> > 
> > (*) have been on virtual desktop where firefox was running, switched to 
> > console using Ctrl-Alt-F1, and switched back to X using F7. Firefox then 
> > popped up some dialog about configuring some feature that is triggered by 
> > pressing F7/AltF7, or whatever. Is that what you are seeing?
> 
> Yes, I typically see it with the help screen. It also happens with
> other applications, not just firefox.
> 

I don't really see the issue here, except for maybe X being stupid - it
seems that it processes release events as press+release in cases when it
did not see the press event.

Start up xev, switch to text console and then back to X (don't release
the CTRL+ALT+Fx combo). Let X switch fully and then release the combo.
Observe the 2 events reported by xev for Fx key. You may try running
evtest in other window and observe that there are no down events at the
time of 2 xev events, only autorepeats and release event (and
autorepeats are ignored by X who does it's own software autorepeat).

-- 
Dmitry
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