linux-kernel - Re: 2.6.24-git15 Keyboard Issue?

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Message-Id: <1202402704.6087.12.camel@popeye>
Date:	Thu, 07 Feb 2008 10:45:04 -0600
From:	Chris Holvenstot <cholvenstot@...cast.net>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	Jiri Kosina <jkosina@...e.cz>,
	Kernel <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: 2.6.24-git15 Keyboard Issue?

Thomas - 

I hope that, from at least my perspective, your question is rhetorical.
I am fully willing to publicly admit that I don't have a clue. About
much of anything. I will even admit that until prompted by Jiri
yesterday I had never even heard of the nohpet directive for the boot
line. 


I am willing to do whatever I can to help isolate and or resolve this
issue, but to do so I need one of you experts to firmly grab hold of
some portion of my anatomy and guide me in the right direction.

Chris



On Thu, 2008-02-07 at 17:13 +0100, Thomas Gleixner wrote:
> On Thu, 7 Feb 2008, Chris Holvenstot wrote:
> 
> > OK - I think that this is wat you are looking for.   If there is
> > anything else I can proivde or if I have mucked up this simple cut and
> > paste just let me know.
> > 
> > /proc/timer_list after a "standard" boot up:
> > Tick Device: mode:     1
> > Clock Event Device: pit
>  
> > /proc/timer_list after a boot with nohpet
> > Tick Device: mode:     1
> > Clock Event Device: pit
> 
> Both use PIT, so no hpet involved
> 
> > The dmesg output after a "standard" boot:
> 
> > [    0.000000] Kernel command line: root=UUID=4dc2e6b0-c980-418b-8ad0-98358e7ec47d ro quiet splash
> > [    0.368027] Time: acpi_pm clocksource has been installed.
> 
>  
> > The dmesg output after a boot with "nohpet"
> 
> > [    0.000000] Kernel command line: root=UUID=4dc2e6b0-c980-418b-8ad0-98358e7ec47d ro quiet splash nohpet
> > [    0.368027] Time: acpi_pm clocksource has been installed.
> 
> Both boots use acpi_pm clocksource and there is nowhere a sign of HPET
> in the logs except the "nohpet" on the command line.
> 
> /me is confused 
> 
> How does "nohpet" on the command line influence the behaviour, when
> there is no hpet available at all.
> 
> Thanks,
> 	tglx
> 
> 

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