[ltp] Battery drain in S3

[Brian D. Ropers-Huilman]

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Joachim Schrod said the following on 2004-12-09 07:15:
| Many people report that resume from suspend-to-RAM doesn't work any
| more with 2.6 kernels. Supposedly, it leaves the screen blank, with no
| way to revitalize the system.

My R50p has always run a 2.6 kernel and I have had varying success with
APM, as I have posted to this list before. Basically it works great
until it stops working. I have been able to suspend and resume many
times and then, seemingly random to me, it won't suspend or resume. A
reboot, which is the only recovery mechanism, allows me to suspend and
resume again without issue, until it doesn't work again. :) I should
also note that sometimes it doesn't work right away; after a fresh
reboot, and sometimes cold power cycle, it won't suspend, or it will
suspend but not wake up.

I then moved to ACPI which worked wonderfully: it _always_ put the
machine to sleep, quickly, and it always woke up, but, I _always_ lost
my display. :( Then I added a chvt 1 to my scripts and ACPI worked fine.
Until it stopped working, which happened when I upgraded kernels. I am
not certain which upgrade it was, but I think it was this most recent
bump from 2.6.8 to 2.6.9.

So, at this point, I do _not_ have a working APM or ACPI solution and it
is quite frustrating. I drop my R50p into a port replicator here at work
when I arrive in the morning. When I zip down the hall or across campus
for a meeting I grab my 15" Apple PowerBook. It is so nice to use that
system and have it reliably sleep and wake up every single time, but it
adds to my frustrations with Linux on my ThinkPad. I want the
functionality I get in the PowerBook since I take my R50p home each
night and travel with it, something I do quite frequently.

For the record, both my sound and networking have always worked upon
resume under both APM and ACPI, when I had them working and I do not
load PCMCIA / PC-Card modules so that is not my issue.

I would love to hear from other R50p owners who have a working
configuration. I am at my wits end... :(

- --
Brian D. Ropers-Huilman  .:. Asst. Director .:.  HPC and Computation
Center for Computation & Technology (CCT)        bropers@cct.lsu.edu
Johnston Hall, Rm. 350                           +1 225.578.3272 (V)
Louisiana State University                       +1 225.578.5362 (F)
Baton Rouge, LA 70803-1900  USA              http://www.cct.lsu.edu/
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