ACPI: Standby, sleep, suspend and resume

[doug at safeport.com]

On Sat, 25 Nov 2006, doug wrote:

> On Sat, 25 Nov 2006, Erik Norgaard wrote:
>
>> Hi:
>> 
>> I have the following sysctl parameters:
>> 
>> hw.acpi.supported_sleep_state: S3 S4 S5
>> hw.acpi.power_button_state: S5
>> hw.acpi.sleep_button_state: S3
>> hw.acpi.lid_switch_state: NONE
>> hw.acpi.standby_state: S1
>> hw.acpi.suspend_state: S3
>> hw.acpi.sleep_delay: 1
>> 
>> First, I'd like that the screen is switched off when the lid closes, so I 
>> assume that I should set hw.acpi.lid_switch_state to something, but I don't 
>> know what.
>> 
>> Second: Is there a way to manually toggle the sleep state so I can create a 
>> menu item "sleep" or "standby"?
>> 
>> Last: When the laptop goes into some suspend mode - I don't know which - I 
>> don't know how to bring it back alive except for rebooting. What is the 
>> secret key combination? (typically).
>> 
>> Thanks, Erik
>
> These are my settings. This is for a thinkpad T42p, your settings may be 
> slightly different.
>
> sysctl:
>
>   hw.acpi.supported_sleep_state: S3 S4 S5
>   hw.acpi.power_button_state: S5
>   hw.acpi.sleep_button_state: S3
>   hw.acpi.lid_switch_state: NONE
>   hw.acpi.standby_state: S1
>   hw.acpi.suspend_state: S3
>   hw.acpi.sleep_delay: 3
>
> /boot/loader.conf
>
>   snd_ich_load="YES"
>   if_ipw_load="YES"
>   wlan_load="YES"
>   wlan_wep_load="YES"
>   acpi_ibm_load="YES"   <---- for thinkpad
>
> If I close the lid the T42p goes to standby, opening wakes up. The sleep 
> button fn-F4 does a suspend, again opening the lid does a resume. I have not 
> figured out suspend to disk but for my purposes suspend draws power so 
> slowly, I have not bothered.
>
> It may be that you do need something set for hw.acpi.lid_switch_state, I do 
> not. Resume does not correctly redraw the X-windows background, but it 
> writing this I noticed I put:
>
>    notify 10 {
>          match "system"          "ACPI";
>          match "subsystem"       "Lid";
>          action "/usr/X11R6/bin/xrandr -display :0.0 -s 0";
>    };
>
> inside of the comments in /etc/devd.conf.
>
> I got most of my information from:
>
>   http://www.cs.ucr.edu/~trep/tsrT40freebsd.html
>   google
>   various Linux sites talking about thinkpads

The devd.conf change works. Trying to help you helped me. I hope this 
information aids you as well. Without the xrandr, I got black and white stripes 
randomly for the background.