linux-kernel - Re: Boot problems with 2.6.29.1 - cannot smoothly boot on battery

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Date:	Sun, 24 May 2009 14:20:09 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
CC:	Chris Howie <cdhowie@...il.com>, linux-kernel@...r.kernel.org,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	Linux PM List <linux-pm@...ts.linux-foundation.org>,
	Ingo Molnar <mingo@...e.hu>, Greg KH <gregkh@...e.de>
Subject: Re: Boot problems with 2.6.29.1 - cannot smoothly boot on battery

Rafael J. Wysocki wrote:
> On Monday 18 May 2009, Chris Howie wrote:
>> Folks:
>>
>> I've been running 2.6.29.1 for some time and reported an issue to this
>> mailing list a while ago about the boot process.  I believe I have now
>> nailed down the one factor that determines whether I see this issue.
>>
>> The problem arises only when booting or halting my laptop when there
>> is no power plugged in, e.g. the system is running on battery.
>> Sometime after init begins starting services I must hold down a key on
>> the keyboard to convince it to continue booting, otherwise it just
>> hangs.  If the system is running on AC then it boots fine.  This same
>> problem repeats itself during the halt process if running on battery.
>>
>> This also happens when resuming a suspend-to-disk image, after loading
>> the data from the hard drive, but before control is returned to
>> userspace.  The keyboard has no effect on this hang, presumably
>> because the kernel is not listening to the keyboard at this point.
>> When this happens the only solution is to hold the power button and
>> boot normally instead.
>>
>> An issue like this is a serious usability problem for me.  I am
>> neither a kernel developer nor hacker, my coding skills applying
>> mostly to userspace applications.  If there is anything you need from
>> me to help diagnose this problem please let me know.
>>
>> I am not subscribed so please CC me on replies.
> 
> Let's try to make your report a bit more visible (some CCs added).
> 

I presume it boots with "acpi=off"?

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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