Re: BUG lapic: Can't boot on battery (2.6.21-rc{1,2,3,4})

From: Stefan Prechtel
Date: Mon Mar 19 2007 - 15:18:17 EST


(Bugzilla)
Does booting w/ clocksource=acpi_pm avoid the problem?
No, it doesn't.
I hope it's ok that I added your email to CC.


2007/3/19, Stefan Prechtel <stefan.prechtel@xxxxxxxxxxxxxx>:
Hi!

If the ac-cable is plugged in, I can start my Notebook (HP nx6325)
without any problems.
On battery the kernel hanging around and it takes "hours" to boot the
kernel and the system is *very* slow. For example an init-skript takes
very long until it's started.

I did a git-bisect and found out that this is the first bad commit:
commit e9e2cdb412412326c4827fc78ba27f410d837e6e
Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Date: Fri Feb 16 01:28:04 2007 -0800

[PATCH] clockevents: i386 drivers

Add clockevent drivers for i386: lapic (local) and PIT/HPET
(global). Update
the timer IRQ to call into the PIT/HPET driver's event handler and the
lapic-timer IRQ to call into the lapic clockevent driver. The
assignement of
timer functionality is delegated to the core framework code and replaces the
compile and runtime evalution in do_timer_interrupt_hook()

Use the clockevents broadcast support and implement the lapic_broadcast
function for ACPI.

No changes to existing functionality.

So I tried to boot with nolapic on battery and with this option the
kernel (and system) starts as it should.
If you need more information, I will send it to you.

Regards,
Stefan Prechtel

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