ACPI Testing

[Jim Cornette]

Michal Jaegermann wrote:
> On Fri, Jun 18, 2004 at 11:58:42PM -0400, Douglas Kilpatrick wrote:
> 
>>Advice:  If your laptop supports APM, continue to use it.  acpid is much
>>more programmable, but since the video won't come back after an ACPI
>>suspend/resume cycle unless you are lucky (see the video.txt file mentioned
>>above), APM suspend will actually WORK.
> 
> 
> The trouble is that you do not have much choice and this depends not
> on a kernel but what happens to be in a BIOS of what you have on
> hands.  For example my wife's laptop, Acer TM 230, has some
> leftovers of APM but if you will try to use it, say to read a
> battery status, it bombs in BIOS.  No way to suspend anything with
> that.
> 
> With ACPI I can get battery just fine and although I had to add
> 'acpi_sleep=s3_bios' to boot parameters, or video will be not
> restored on wakup, and I have to ensure that ehci_hcd module is
> unloaded before sleep attempts, which is easy in acpi scripts, but
> then it actually suspends, and wakes up, and I do not even have to
> do things like 'chvt 1' before sleeping.  The later was a
> requirement to prevent crashing video on an old Toshiba with APM.
> 
> ACPI looks like a big unwieldy blob which is more often screwed
> than not on a firmware level but we may not have much choice in the
> matter.  I heard about boxes which will not even boot without ACPI
> although I have yet to see one myself.
> 

I have such a computer, an HP ze4315us model. It is good that re-enabled 
within the FC2 kernels.

Battery status and thermals work with apci. I never tried to suspend 
this machine.

Jim
-- 
It's lucky you're going so slowly, because you're going in the wrong 
direction.