From: Pavel Machek <pavel@ucw.cz>
To: Mike Waychison <Michael.Waychison@Sun.COM>
Cc: Linux kernel <linux-kernel@vger.kernel.org>
Subject: Re: wakeup_pmode_return jmp failing?
Date: Mon, 6 Dec 2004 14:34:55 +0100 [thread overview]
Message-ID: <20041206133455.GA1213@elf.ucw.cz> (raw)
In-Reply-To: <41B084B4.1050402@sun.com>
Hi!
> Not sure who to direct this to. I've been trying to get acpi s3 to work
> on my pentium M laptop (tecra m2). Without the nvidia driver loaded, I
> can echo 3 > /proc/acpi/sleep and the machine does indeed suspend (power
> light throbs and all). However, when I try to wake up the thing, it
> would flash the bios screen and throw me back to grub.
>
> I've been investigating the code at arch/i386/kernel/acpi/wakeup.S, and
> have discovered that if I place a busy wait directory before the ljmpl
> to wakeup_pmode_return, that I indeed do see 'Lin' on the screen instead
> of the bios screen.
>
> The joke is, if I place a busy wait first thing after the
> wakeup_pmode_return label, it never gets executed and I get a regular boot.
>
> It would appear as though the jump from 16bit code into the 32bit code
> is failing and the bios is kicking in with a regular startup.
See archives of linux-acpi lists.
Pavel
--
People were complaining that M$ turns users into beta-testers...
...jr ghea gurz vagb qrirybcref, naq gurl frrz gb yvxr vg gung jnl!
next prev parent reply other threads:[~2004-12-06 13:35 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-12-03 15:22 wakeup_pmode_return jmp failing? Mike Waychison
2004-12-03 17:07 ` Bill Davidsen
2004-12-03 17:04 ` Mike Waychison
2004-12-05 3:04 ` Matthew Garrett
2004-12-05 2:56 ` Matthew Garrett
2004-12-06 13:36 ` Pavel Machek
2004-12-06 13:34 ` Pavel Machek [this message]
2004-12-07 3:39 ` Mike Waychison
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