[ltp] Does APM still work on 2.6?

Theodore Ts'o linux-thinkpad@linux-thinkpad.org
Thu, 13 May 2004 21:52:19 -0400


On Thu, May 13, 2004 at 07:59:18PM -0400, Aaron Mulder wrote:
> On Thu, 13 May 2004, Crispin Cowan wrote:
> > Stock SuSE 9.1 Pro (Linux 2.6.4-52-default) worked out of the box. 
> > Battery life WRT computation is excellent; the powerscaling is 
> > definitely running. Battery life while sleeping definitely sucks, it 
> > burns between 6% and 10% per *hour* while suspended to RAM. Suspend to 
> > disk does not work.
> 
> 	See -- this is my problem.  I can leave my machine suspended for 
> days now, with little noticeable battery drain.  Why would I want to 
> "upgrade" and be limited to 10 hours?  This is why I'd like to upgrade to 
> 9.1 but disable ACPI and have APM work just like it does now.

APM works just fine with my T40 and 2.6.  I'm not going to use ACPI
for real (fool me once, shame on you, fool me twice, shame on me)
until the ACPI power management gets significantly better:

	* Resume needs to work reliably, not just suspend, regardless 
		of what modules might be plugged in or USB devices attached
	* Suspend to RAM needs to get as efficient as APM
	* Suspend to disk needs to work correctly, and again as 
		reliably as APM currently does.

						- Ted