From mboxrd@z Thu Jan  1 00:00:00 1970
From: Dmitry Torokhov <dmitry.torokhov-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Subject: Re: [Bug #14388] keyboard under X with 2.6.31
Date: Mon, 12 Oct 2009 16:46:41 -0700
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To: Alan Cox <alan-qBU/x9rampVanCEyBjwyrvXRex20P6io@public.gmane.org>
Cc: Nix <nix-dKoSMcxRz+Te9xe1eoZjHA@public.gmane.org>, "Justin P. Mattock" <justinmattock-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>, "Rafael J. Wysocki" <rjw-KKrjLPT3xs0@public.gmane.org>, Linux Kernel Mailing List <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, Kernel Testers List <kernel-testers-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, Boyan <btanastasov-/E1597aS9LT10XsdtD+oqA@public.gmane.org>, Ed Tomlinson <edt-Yad3+ZauZac@public.gmane.org>, =?iso-8859-1?B?RnLpZOlyaWMgTC4gVy4=?= Meunier <fredlwm-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>, Linus Torvalds <torvalds-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>, OGAWA Hirofumi <hirofumi-UIVanBePwB70ZhReMnHkpc8NsWr+9BEh@public.gmane.org>

On Tue, Oct 13, 2009 at 12:38:41AM +0100, Alan Cox wrote:
> > So it seems likely to me that this is a kernel bug, somewhere, and the
> > TTY layer seems like a good place to look (OK, a horrible place, but a
> > *likely* place).
> 
> Somewhere around 2.6.29-30 various things went funny in the keyboard
> layer for me - notably characters "bleeding" across console switches.
> 

What do you mean by "bleeding"? Are you sure it is not autorepeat
kicking in?

> > 
> > I'm about to try reverting the suggested commit and will report back. I
> > see this failure about once a day, so I'll give it three days to go
> > wrong and then (if it doesn't) will presume it works and so inform you.
> > 
> > 
> > (Of course with this commit reverted Emacsen start dropping data from
> > their ptys, and as bad luck would have it I live in (X)Emacs, but that's
> > on a different machine! so I can have my compile buffer data *and* not
> > destroy X ;} )
> 
> X doesn't touch the pty layer. It touches vt (extensively) and the input
> layers. It's vt/kbd access is also very raw so bypasses much of that
> layer. That isn't to say tty isn't the cause but look for input layer
> changes too.

-- 
Dmitry