linux-kernel - Re: [git pull] Input updates for 2.6.34-rc6

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Date:	Thu, 13 May 2010 09:38:20 -0700
From:	Randy Dunlap <rdunlap@...otime.net>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Bastien Nocera <hadess@...ess.net>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-input@...r.kernel.org
Subject: Re: [git pull] Input updates for 2.6.34-rc6

On Thu, 13 May 2010 09:16:31 -0700 (PDT) Linus Torvalds wrote:

> 
> 
> On Thu, 13 May 2010, Dmitry Torokhov wrote:
> > 
> > From what I remember (it was a few weeks old thread) we were hanging
> > when trying to read from the controller in i8042_flush(). Normally, if
> > controller isn't there we'd get a stream of 0xff which will never
> > "clear" and so after 32 reads we give up and abort controller
> > initialization. But on Bastien's box it just sits there.
> 
> Is there a web interface to some archive for linux-input (or was this 
> thread on lkml)?

>From Jan. 20, on lkml.
See http://lkml.org/lkml/2010/1/20/254


> Anyway, the fact that apparently pressing the power button makes it come 
> alive again implies that it's likely SCI/SMI-related. Which is not 
> entirely unexpected if there is some crazy SMM thing going on. But 
> presumably whatever buggy Apple code is _supposed_ to work for Windows, so 
> I wonder what bug that quite simple status/data register read could 
> possibly trigger.
> 
> Is it the status read or the data read that causes problems, and is it the 
> first one or after doing a few? A couple of printk's in that i8042_flush() 
> routine should tell us.


---
~Randy
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