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

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Date:	Mon, 25 May 2009 09:18:19 +0800
From:	Shaohua Li <shaohua.li@...el.com>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>, Chris Howie <cdhowie@...il.com>,
	"linux-kernel@...r.kernel.org" <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

On Mon, May 25, 2009 at 05:20:09AM +0800, H. Peter Anvin wrote:
> 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"?
if this is a AMD CPU, please check http://bugzilla.kernel.org/show_bug.cgi?id=13233
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