[ltp] T41 in suspend to RAM: gets warm and not much bat. life

[Peter Frühberger]

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Felix E. Klee schrieb:
> When I put my T41 into suspend to RAM and store it in a computer bag,
> then I notice that it gets pretty warm.  Also battery life is not that
> great.  Just a guess: from a full charge I get roughly 1/2h of work plus
> 6 hours of suspend to RAM.  Some data:
> 
> ~# uname -a
> Linux t41 2.6.14.4 #2 Thu Mar 16 12:03:52 CET 2006 i686 unknown unknown GNU/Linux
> 
> /sys/devices/platform/smapi/BAT0# cat cycle_count 
> 199
> /sys/devices/platform/smapi/BAT0# cat cycle_count 
> 199
> /sys/devices/platform/smapi/BAT0# cat design_capacity 
> 47520 mWh
> /sys/devices/platform/smapi/BAT0# cat last_full_capacity 
> 41220 mWh
> /sys/devices/platform/smapi/BAT0# cat model 
> IBM-08K8193
> /sys/devices/platform/smapi/BAT0# cat manufacturer 
> SANYO
> 
> Graphics chip: Radeon 9000
> 
> X driver: The one from ATI (version 8.22.5), running in low power mode
> 
> I already ran that power consumption check tool from Thinkwiki: It said
> that my machine does not suffer from the bug that there's too much power
> drain in suspend to RAM.

Did you run it while on AC Power?

> 
> Is it normal that the machine gets quite warm (guess somewhere around
> 40° C, I assume) in suspend to RAM when stored in a bag?  How much
> battery life should one get out of a T41 with a 6 cell battery when
> running on suspend to RAM?
> 

6 hours of suspend to ram only? I think your machine is heavily infected
;-) I would suggest you try the patched radeonfb driver.
- From within the patch, I read:

+       RADEON_SLEEP_THINKPAD_DMI_MATCH_MODEL("T41")

Info & patch:
http://www.thinkwiki.org/wiki/Problem_with_high_power_drain_in_ACPI_sleep
(info)
http://bugme.osdl.org/show_bug.cgi?id=3022 (patch)



Peter
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