lkml.org 
[lkml]   [2009]   [Nov]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    From
    SubjectRe: intermittent suspend problem again
    Date
    Ferenc Wagner <wferi@niif.hu> writes:

    > Ferenc Wagner <wferi@niif.hu> writes:
    >
    >> "Rafael J. Wysocki" <rjw@sisk.pl> writes:
    >>
    >>> On Wednesday 18 November 2009, Ferenc Wagner wrote:
    >>>
    >>>> Ferenc Wagner <wferi@niif.hu> writes:
    >>>>
    >>>> Side question: If I run s2disk from the init=/bin/bash prompt, the
    >>>> instrumentation in acpi_enter_sleep_state_prep in drivers/acpi/acpica/hwsleep.c
    >>>> fires before the "Snapshotting system" phase, but it does not fire if I
    >>>> hibernate from the full running desktop. (That instrumentation was put
    >>>> there to investigate the KMS-triggered STR freeze.) What could explain
    >>>> this?
    >>>
    >>> It looks like it uses the "shutdown" method when run with init=/bin/bash, but
    >>> I don't know why exactly.
    >>
    >> Thanks for the tip, I'll check this too.
    >
    > While looking into this, I found a reproducible kernel panic:
    >
    > 1. boot with init=/bin/bash
    > 2. mount /usr; swapon -a
    > 3. plug in a USB pendrive
    > 4. s2disk (machine goes to sleep)
    > 5. power on, proceed with resuming, press Enter to cancel resume pause
    > 6. ACPI: Hardware changed while hibernated, cannot resume!
    > Kernel panic - not syncing: ACPI S4 hardware signature mismatch
    >
    > Does it make sense?

    Yes it does: it's the BIOS USB support playing its childish games.
    I can disable it most of the time, except when booting from USB...

    I wonder if this problem sould be handled more gracefully, now that USB
    persistence is enabled by default. It works just fine for STR, but
    potentially panics after hibernation.
    --
    Regards,
    Feri.


    \
     
     \ /
      Last update: 2009-11-19 14:05    [W:2.456 / U:0.016 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site