[ltp] Question on swsusp2 and other ACPI trivia

[obi]

On Thu, Jan 06, 2005 at 04:25:15PM +0100, Bob Alexander wrote:
> To solve my 2.6.9-2.6.10-ACPI-APM deadlock I have now found the 
> following sensible solution:
> 
> Patched a 2.6.10 with the external swsusp2 and enabled ACPI including 
> the builtin ibm_acpi.
> 
> After setting up a few things I am delighted to be able to suspend to 
> HDD (let's call it hibernate ?) on my /dev/hda6 swap partition very 
> reliably.
> 
> Have a few questions though:
> 
> 1) If I hibernate while pinging a site, upon resuming the ping does not 
> progress. If I interrupt it and relaunch all is fine. Normal ?
> 
> 2) I have tied the lib button and the Fn-F4 to the "hibernate" command 
> script. Now I would like to do something cleaner and associate the 
> Fn+F12 button to my hibernate script but I cannot understand how.
> 
> A tail -f /var/log/acpid shows events triggered for lid or FnF4 but NOT 
> for FnF12 ... what am I missing ???

Have you 
	echo enable > /proc/acpi/ibm/hotkey
	echo ffff > /proc/acpi/ibm/hotkey
to enable the extra buttons? On my T41 I got quite a few Fn+F? with this.

> Last question: as I have compiled CPU throttling in my kernel, could I 
> bring the CPU to 600MHz when on battery (and maybe go on low LCD 
> luminosity) and back to 1600MHz when on AC (and full LCD brightness) ... 
> any examples ?

Sure you can: I do use powernwd that adapts the speed to what I need at
the moment. But you if you look into /sys/devices/system/cpu/cpu0/cpufreq
there are few files and you can echo values into some of them (I think
scaling_max_freq and scaling_min_freq for example). That should change
the speed of the CPU.

graziano

> 
> Thank you very much,
> Bob
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