From: Mike Waychison <Michael.Waychison@Sun.COM>
To: Linux kernel <linux-kernel@vger.kernel.org>
Subject: wakeup_pmode_return jmp failing?
Date: Fri, 03 Dec 2004 10:22:28 -0500 [thread overview]
Message-ID: <41B084B4.1050402@sun.com> (raw)
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Hello,
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.
Anybody have any suggestions?
- --
Mike Waychison
Sun Microsystems, Inc.
1 (650) 352-5299 voice
1 (416) 202-8336 voice
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NOTICE: The opinions expressed in this email are held by me,
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next reply other threads:[~2004-12-03 15:22 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-12-03 15:22 Mike Waychison [this message]
2004-12-03 17:07 ` wakeup_pmode_return jmp failing? 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
2004-12-07 3:39 ` Mike Waychison
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