Messages in this thread | | | Date | Sun, 8 Oct 2006 18:42:31 +0000 | From | Pavel Machek <> | Subject | Re: [PATCH] preserve correct battery state through suspend/resume cycles |
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Hi!
> > boot -> suspend -> (un)plug battery -> resume > > > > The problem arises in both cases - i.e. suspend with battery plugged in, > > and resume with battery unplugged, or vice versa. > > > > After resume, when the battery status has changed (plugged in -> unplegged > > or unplugged -> plugged in) during the time when the system was sleeping, > > the /proc/acpi/battery/*/* is wrong (showing the state before suspend, not > > the current state). > > Is this also needed if you use "platform" method? Also with suspend-to-RAM? > > > The following patch adds ->resume method to the ACPI battery handler, which > > has the only aim - to check whether the battery state has changed during sleep, > > and if so, update the ACPI internal data structures, so that information > > published through /proc/acpi/battery/*/* is correct even after suspend/resume > > cycle, during which the battery was removed/inserted. > > Although it generally is a good idea to add suspend and resume methods to > all ACPI drivers, it would be interesting to know if you still need this > when using the correct method (platform) instead of the incorrect default > method (shutdown). > > echo "platform" > /sys/power/disk > echo "disk" > /sys/power/state
Maybe we should change the default in 2.6.20 or so?
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