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    SubjectRe: Totally broken PCI PM calls
    Date
    On Monday 11 October 2004 3:12 pm, Stefan Seyfried wrote:
    > David Brownell wrote:
    >
    > > The machines I've tested with relatively generic 2.6.9-rc kernels
    > > don't use BIOS support for S4 when I call swsusp.
    >
    > first do either
    > echo platform > /sys/power/disk # for S4
    > echo shutdown > /sys/power/disk # for poweroff
    >
    > then do
    > echo disk > /sys/power/state

    Oddly enough, neither of them work lately for me.
    They each resume immediately after writing the
    image to disk.

    - Dave

    p.s. I find the /sys/power/disk file mildly cryptic, maybe
    other folk will find the attached patch slightly more
    informative about what this interface can do.



    --- 1.19/kernel/power/disk.c Thu Sep 9 08:45:13 2004
    +++ edited/kernel/power/disk.c Fri Oct 1 11:01:41 2004
    @@ -282,7 +282,14 @@

    static ssize_t disk_show(struct subsystem * subsys, char * buf)
    {
    - return sprintf(buf,"%s\n",pm_disk_modes[pm_disk_mode]);
    + return sprintf(buf,"%s%s %s%s %s%s\n",
    + (pm_disk_mode == pm_ops->pm_disk_mode) ? "*" : "",
    + pm_disk_modes[pm_ops->pm_disk_mode],
    + (pm_disk_mode == PM_DISK_SHUTDOWN) ? "*" : "",
    + pm_disk_modes[PM_DISK_SHUTDOWN],
    + (pm_disk_mode == PM_DISK_REBOOT) ? "*" : "",
    + pm_disk_modes[PM_DISK_REBOOT]
    + );
    }

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