[ltp] Hot Sleep

[Crispin Cowan]

Brad Langhorst wrote:

>On Sun, 2004-05-02 at 16:53, Crispin Cowan wrote:
>  
>
>>In all of my previous laptops (Toshiba Tecra 700, Toshiba Tecra 530, and 
>>IBM Thinkpad 770Z) suspend to RAM has burned about 1% of battery per 
>>hour, and the machine was cool to the touch. With my new T40, it sleeps 
>>rather more hot. Even when it has been suspended for hours, it is hot to 
>>the touch, and looking at the change in battery levels, it is burning at 
>>least 10% of battery power per hour while suspended.
>>    
>>
>yeah - acpi3 != supsend to ram
>on my T40 either...
>  
>
I'm not saying it doesn't work. It does work:

    * drive parks
    * screen darkened
    * power consumption way down

So I intend to keep using it. I was just wondering if I'm doing 
something wrong such that a hot component is staying powered up.

It sounds like it is just that ACPI is not mature enough to power down 
everything in suspend-to-RAM.

I also tried suspend-to-disk, and got the same problem others are 
reporting: it goes through the motions and then wakes back up again 
immediately.

>i switched back to apm
>  
>
I'm confused by this recommendation. I don't have any APM stuff 
installed, and I thought APM was unavailable in newer hardware. How do I 
switch "back" to APM? I.e. how do I enable it for this OS (Linux 2.6.4) 
and hardware (T40).

Crispin

-- 
Crispin Cowan, Ph.D.  http://immunix.com/~crispin/
CTO, Immunix          http://immunix.com