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    SubjectRe: [BKPATCH] ACPI for 2.4
    Hi Len,

    On Sat, Feb 07, 2004 at 04:10:24AM -0500, Len Brown wrote:
    > bk pull
    > the AML param fix is in 2.6 -- the others changes
    > are Asus and Toshiba model specific.

    I encountered something strange that I still cannot explain. I have two
    machines, one athlon-based VAIO notebook and one P4-based supermicro 1U
    server, which don't poweroff when I halt them or send them a Sysrq-O. At
    first, I only noticed this on the VAIO so I thought that something changed
    in ACPI recently, because it was OK around 2.4.21 or 2.4.22 with acpi patch
    from around 09/2003, but I believe that the problem appeared when I used
    2.4.23 + the acpi-20031203 patch, which is now included in 2.4.25-rc1. But
    then I discovered that I can poweroff both the notebook and the 1U by a
    simple "echo 5 >/proc/acpi/sleep".

    So I've added printk's into acpi_power_off(), and I see that the system
    doesn't return from acpi_enter_sleep_state_prep(S5), which itself hangs
    on the call to acpi_evaluate_object(NULL, "\\_PTS",...). If I comment
    out this line, it now goes on through the next calls, then normally leaves
    acpi_enter_sleep_state_prep(), then powers off correctly. I have not tested
    yet you very latest patch, but I don't think it would change anything.

    Do you have any idea ? What can I provide to help in resolving this problem ?


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