[ltp] ACPI R40

d.lj linux-thinkpad@linux-thinkpad.org
Wed, 19 Nov 2003 17:23:00 +0100 (CET)


hy, speaking of all this, i just switched to acpi on the R40 and
surprisingly i have a couple of question ... ;)


* swsusp (echo 4 >/proc/acpi/sleep) works fine except it doesnt shutdown
completely but i have to press the powerbutton for a few seconds (the
force method) to really power off.

* echo 3 doesnt, i.e. the laptop goes into the moon-mode (status light)
very quickly but i m not able to wake it up again, also i cant shut it
off with the power button but have to unplug ac, remove the battery.

* how do you map fn+F4 resp. fn+F12 keys to echo 3, 4?

i ve tried on 2.6.0-test9 and 2.6.0-test9-mm4, both show same behaviour.

as usual any hintz are appreciated.

bg, j

[Theodore Ts'o]->[Re: [ltp] the purpose or advantage of suspend and...

 |On Wed, Nov 19, 2003 at 01:42:44PM +0000, Ross Burton wrote:
 |> On Wed, 2003-11-19 at 13:35, Dennis D. Jensen wrote:
 |> > Why not just shutdown and boot again when needed? It
 |> > doesn't take _that_ long, unless of course you run a
 |> > fashionable GUI Desktop (I don't).
 |>
 |> Suspending and unsuspending takes about 4 seconds, shutting down and
 |> rebooting takes a lot more than that.  With suspend I can shut the case
 |> of my laptop when the train pulls into a station, and throw it in my
 |> bag.  When I get back on the train/in the office/whatever, I just open
 |> the case and by the time I've got my hands on the keyboard, everything
 |> is exactly as it was.
 |
 |Absolutely.  That being said, though, I haven't seen the point of
 |suspend to disk, versus suspend-to-memory.  It doesn't take *that*
 |much power to keep the memory refresh circuits going, especially when
 |you have to compare it with the amount of juice to write a heck of a
 |lot of data to disk.  Suspend to disk also takes a lot longer than a
 |suspend-to-memory.
 |
 |Fortunately, while hibernation (suspend-to-disk) doesn't seem to work
 |for me with my T40, suspend-to-memory works fine, as long as I'm using
 |APM and not ACPI.  It's annoying that I can't get the exact discharge
 |rate of the batteries like I could with ACPI, but suspend-to-memory is
 |infinitely more important.
 |
 |						- Ted
 |

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