I had the same problem with my X61 and judging from various reports around the
Internet, this seems to be rather common (even with Windows). I believe that
some parts of the system are not completely shut down when hibernating through
ACPI. For instance, the network card remains active (don't really know, if this
is the BIOS' or Ubuntu's fault).
Fortunately there appears to be a simple workaround:
You have to switch from hibernate via ACPI to a complete shutdown (that is from
platform to shutdown in/sys/power/disk):
echo shutdown /sys/power/disk
or for a more permanent solution, if you are using sysfsutils:
Add the line
power/disk = shutdown
to /etc/sysfs.conf.
Another possibility should be (I haven't tested that):
Add a file to /etc/pm/config.d (f.i.:
/etc/pm/config.d/99thinkpad_workaround) containing:
# Works around the battery drain on thinkpads when hibernating
# through ACPI.
HIBERNATE_MODE=shutdown
Interestingly enough, I have
HIBERNATE_MODE=shutdown
in /etc/default/acpi-support, but that doesn't seem to have any effect on
pm-utils (which are used to to the actual hibernation).
Could you confirm that this works? Maybe we should forward the solution
to the pm-utils guys.
Cheers, Konrad
--
battery drain during hibernation
https://bugs.launchpad.net/bugs/259496
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