Re: [RFT] x86 acpi: normalize segment descriptor register on resume

Pavel Machek
2008-07-14T06:14:03Z

On Sun 2008-07-13 22:22:06, Henrique de Moraes Holschuh wrote:
> On Sun, 13 Jul 2008, Andi Kleen wrote:
> > It probably switches to protected mode. I noticed this on my old
> > Fujitsu laptop when I tried to make the S3 wakeup run in the s2ram x86 emulator
> > and found it entered protected mode at some point, which x86emu
> > didn't support.
> >
> > I guess Lenovo is doing the same.
> >
> > And that protected mode code relies on some GDT values that have been
> > loaded earlier when the BIOS also went into protected mode.
> >
> > It seems the BIOS programmers really don't like real mode anymore.
> > Somehow understandable.
>
> If it were just Lenovo, it shouldn't be too difficult to get them to fix the
> BIOS. But since other vendors have the same problem, that won't fly as a
> solution.

With all the BIOSes in field, practically impossible to update? (My
x60 has no CDrom..) No, I don't think we can expect fix from BIOS vendors.

Pavel
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