Messages in this thread | | | Date | Mon, 06 Dec 2004 22:39:30 -0500 | From | Mike Waychison <> | Subject | Re: wakeup_pmode_return jmp failing? |
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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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