Re: wakeup_pmode_return jmp failing?

Mike Waychison
2004-12-07T03:39:38Z

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Pavel Machek wrote:
> 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

FYI, Hiro's patch that copies the GDT to the resume page did the trick:

http://marc.theaimsgroup.com/?l=acpi4linux&m=109813262218004&w=2

Thanks,

- --
Mike Waychison
Sun Microsystems, Inc.
1 (650) 352-5299 voice
1 (416) 202-8336 voice

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