Thread (26 messages) 26 messages, 5 authors, 2009-10-23

Re: [regression] 2.6.30 leaking keys on console switch

From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Date: 2009-10-14 04:59:35
Also in: lkml

[ressurecting old thread...]

On Wed, Jul 08, 2009 at 01:20:23PM +0200, Jiri Kosina wrote:
On Tue, 7 Jul 2009, Dmitry Torokhov wrote:
quoted
quoted
quoted
One new issue I see in 2.6.30 (I think I saw it in some rc*s) too is 
that console switch often leaks the Fkey of the console switch into the 
target console.

The symptome is that e.g. firefox if it was active and you're switching
into X displays its help screen (F1 = help). It happens on non X 
consoles too, but of course the symptoms are different here.

That's a regression against 2.6.29; I don't remember it in .29

Haven't investigated code.
Are you seeing with a specific keyboard type(s), or is this a general 
problem? Could you confirm whether it is specific either 
to PS2 or USB keyboards only, or it does happen for both?
Can't think of any input chnages in this timeftrame that would cause
such effect. Maybe TTY changes?
For completness, Andi sent me the following evtest output off-list 
yesterday. The LeftAlt being autorepeated at time 1246964430.448470 is a 
little bit suspicious, as it is preceeded by release ... I don't see how 
this could be causing the behavior Andi is observing though.

I am not able to reproduce the problem myself.
...
Event: time 1246964431.804460, -------------- Report Sync ------------
Event: time 1246964431.828598, type 4 (Misc), code 4 (ScanCode), value 70040
Event: time 1246964431.828602, type 1 (Key), code 65 (F7), value 1
Event: time 1246964431.828604, -------------- Report Sync ------------
Event: time 1246964431.832468, type 17 (LED), code 0 (NumLock), value 0
Event: time 1246964431.832470, -------------- Report Sync ------------
Event: time 1246964431.988595, type 4 (Misc), code 4 (ScanCode), value 700e0
Event: time 1246964431.988601, type 1 (Key), code 29 (LeftControl), value 0
Event: time 1246964431.988603, type 4 (Misc), code 4 (ScanCode), value 700e2
Event: time 1246964431.988605, type 1 (Key), code 56 (LeftAlt), value 0
Event: time 1246964431.988608, type 4 (Misc), code 4 (ScanCode), value 70040
Event: time 1246964431.988610, type 1 (Key), code 65 (F7), value 0
Event: time 1246964431.988611, -------------- Report Sync ------------
Btw, what kind of keyboard is this? I was playing today but I could not
get my USB keyboards to report release of more than 1 key per report....

-- 
Dmitry
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