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    SubjectRe: Vaio doesn't poweroff with 2.4.22
    On Tue, 16 Sep 2003, Roger Luethi wrote:
    > On Mon, 15 Sep 2003 08:43:56 +0200, Geert Uytterhoeven wrote:
    > > With 2.4.22, my Sony Vaio PCG-Z600TEK (s/600/505/ in US/JP) shows a regression
    > > w.r.t. power management:
    > > - It doesn't poweroff anymore (screen contents are still there after the
    > > powering down message)
    > > - It doesn't reboot anymore (screen goes black, though)
    > > - It accidentally suspended to RAM once while I was actively working on it (I
    > > never managed to get suspend working, except for this `accident'). I didn't
    > > see any messages about this in the kernel log.
    > On some machines APIC (sic) support can cause this. Try turning off UP APIC
    > if you have it turned on.

    If I turn off CONFIG_X86_UP_APIC I get:

    | ACPI disabled because your bios is from 00 and too old
    | You can enable it with acpi=force
    | Sony Vaio laptop detected.

    and ACPI is disabled. Halt doesn't work.

    If I then pass `acpi=force' to explicitly enable ACPI, `halt' works again and
    powers off the machine, but `reboot' causes a black screen with IDE disk spun
    down, but no restart.



    Geert Uytterhoeven -- There's lots of Linux beyond ia32 --

    In personal conversations with technical people, I call myself a hacker. But
    when I'm talking to journalists I just say "programmer" or something like that.
    -- Linus Torvalds

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