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    SubjectRe: ThinkPad T400 : should kernel option "reboot=pci" be hard coded ?
    From
    2010/6/9 Toralf Förster <toralf.foerster@gmx.de>:
    > Hi,
    >
    > Matthew Garrett wrote at 16:11:03
    >> On Mon, Jun 07, 2010 at 11:22:21AM +0200, Toralf Förster wrote:
    >> > Since some kernel version (IIRC since 2.6.31) it is necessary to boot the
    >> > linux kernel with that option to prevent an extra 9 seconds delay during
    >> > reboot.
    >> > I found this tip on the LKML -and now I'm wondering whether this option
    >> > should be hard coded in the kernel sources b/c it seems to be necessary
    >> > for current kernels too.
    >>
    >> No, the best thing to do would be to figure out what changed to require
    >> the extra 9 seconds. Are you able to work out which the last kernel
    >> release without this timeout was?
    > The delay exists since 2.6.27, versions before them I can't test due to
    > udev-149 which don't work together with version < 2.6.27.
    >
    > Since version 2.6.29 that kernel boot parameter avoids the extra delay, 2.6.28
    > needs the 9 sec pause independend from what I specify during boot.
    >
    > --
    > MfG/Kind regards
    > Toralf Förster
    >
    > pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3
    >
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    >

    I also have a T400, and reboot=pci solves the problem for me.

    Just tested with kernel 2.6.20 and the 9 second boot delay is still
    there. Maybe this should be hardcoded...

    Regards,
    Pedro
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