[ltp] Suspend to RAM, Kubuntu Edgy, R51

[JP Renaud]

Hello,

My R51 running Kubuntu Dapper (6.06) used to stay suspended to RAM for 2 days 
to 2.5 days. Since I upgraded to Edgy (6.10), it does not stay 1 night. I 
have tried to suspend to RAM using the Kubuntu power manager applet (which 
uses a HAL backend I think) or the kpowersave (using the powersaved backend) 
program and get similar results (the battery drains in a matter of hours when 
suspended).

I initially suspected a battery problem but altough not ingreat, ACPI reports 
it as fine:

$ cat /proc/acpi/battery/BAT0/info
present:                 yes
design capacity:         47520 mWh
last full capacity:      35060 mWh
battery technology:      rechargeable
design voltage:          10800 mV
design capacity warning: 1753 mWh
design capacity low:     200 mWh
capacity granularity 1:  1 mWh
capacity granularity 2:  1 mWh
model number:            IBM-08K8193
serial number:             614
battery type:            LION
OEM info:                SANYO

The laptop stays warmer underneath than it used to in the past so I suspect 
something is not properly suspended and draws a lot of power when suspended 
to RAM.

I use the radeonfb framebuffer and my model is whitelisted (well, it was in 
Dapper) for D2 state during suspend to RAM. Xorg also uses the radeon driver 
with the option DynamicClocks option switched on.

If somebody knows of a fix or could recommend some debugging methodology, I 
would be a taker.

Regards,
 
-- 
JP Renaud
Dingwall, UK

http://www.jprenaud.info