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

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Date:	Sun, 24 May 2009 22:36:21 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Chris Howie <cdhowie@...il.com>
Cc:	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>, "H. Anvin" <hpa@...or.com>,
	Greg KH <gregkh@...e.de>
Subject: Re: Boot problems with 2.6.29.1 - cannot smoothly boot on battery

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).

Best,
Rafael
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