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    SubjectRe: time goes backwards periodically on laptop if booted in low-power mode
    Nick Craig-Wood wrote:
    >
    > On Sun, Feb 17, 2002 at 08:34:20AM -0800, Dan Kegel wrote:
    > > My Toshiba laptop (running stock Red Hat 7.2, kernel 2.4.7-10)
    > > appears to suffer from a power management-related time hiccup: when
    > > I boot in low-power mode, then switch to high-power mode,
    > > time goes backwards by 10ms several times a second.
    > > According to the thread
    > > Subject: [PATCH]: allow notsc option for buggy cpus
    > > From: Anton Blanchard <anton@linuxcare.com.au>
    > > Date: 2001-03-10 0:58:29
    > > http://marc.theaimsgroup.com/?l=linux-kernel&m=98418670406359&w=2
    > > this can be fixed by disabling the TSC option, but there
    > > ought to be a runtime fix. Was a runtime fix ever put
    > > together for this situation?
    >
    > All the IBM thinkpads we have in the office have exactly this problem.
    > The major symptom is that ALT-TAB goes wrong in the sawfish window
    > manager oddly!
    >
    > I made a patch to fix this (this is its first outing). It stops
    > do_gettimeofday reporting a time less than it reported last time.

    I see a minor problem here...what happens if you want to reset your clock (for
    whatever purpose) to a previous time?

    Chris

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    Chris Friesen | MailStop: 043/33/F10
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