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    SubjectRe: Suspend to memory is freezing my machine
    Date
    On Thursday, 22 of May 2008, Zdenek Kabelac wrote:
    > Hello Rafael
    >
    > 2008/5/4 Rafael J. Wysocki <rjw@sisk.pl>:
    > > On Sunday, 4 of May 2008, Zdenek Kabelac wrote:
    > >> Hello
    > >
    > > Hi,
    > >
    > >> With recent 2.6.25 & 2.6.26-rc1 git (around 1 week) I get occasionally
    > >> complete freeze of my T61 during suspend. (dual core, 2GB).
    > >
    > > How reproducible is this?
    > >
    >
    > The problem happens still even with -rc3. Now I've an update:
    >
    > Usually I've to run the machine for couple hours to actually be able
    > to hit this lock.
    > (Usually after a day work when I want to leave)
    >
    > I've also noticed that when I run the suspend after the reboot I
    > usually cannot see the suspend freeze - mostly because either the
    > mashine crashes from other ooops or I do another reboot.
    >
    >
    > >> I'm running kernel with no_console_suspend - but all I can see is
    > >> blinking cursor on an empty screen - thus even when I run kernel with
    > >> most debug options turned on, I can't pass more details so far. I run
    >
    > I've figured out, it was caused by some weird Fedora setting, so
    > adding kernel.printk = 8 to sysctl.conf fixed the issue for me.
    >
    > >> suspend with with SD card in - so maybe some update in the MMC driver
    > >> might be responsible for this ?
    > > (1) The problem occurs without no_console_suspend.
    > > (2) The problem occurs without the SD card.
    >
    > SD card or no_console_suspend option doesn't matter
    >
    > This is what I've seen as the last thing on the screen when deadlock
    > appeared this time:
    > (no SD card inserted)
    >
    > ====
    > Freezing remaining freezable tasks ... (elapsed 0.00 seconds) done.
    > PM: Entering mem sleep
    > drm card0: class suspend
    > drm_sysfs_suspend

    Hm, what kind of graphics adapter is there in your box?

    Rafael


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