[ltp] poll: battery life under T43

[Jiang Qian]

Hi Dillon:
Here are all the patches I installed:
(These are useful for system with latest Samona chipset and your hard 
drive should be listed as sda1.. instead of hda1..

to resume from suspend to ram:
http://shamrock.dyndns.org/~ln/linux/sata_pm.2.6.12.diff

to prevent crashing due to cdrom error handling
http://rtr.ca/dell_i9300/kernel/01_libata_error_handling.patch

to enable SATA pass through layer, i.e. to get hdparm and smartcls work 
properly with hard drive
http://rtr.ca/dell_i9300/kernel/03_libata_passthru.patch

to enable ATA dma, i.e. to get decent speed playing dvd and stuff.
http://rtr.ca/dell_i9300/kernel/02_libata_atapi_dma.patch

To read more:
http://rtr.ca/dell_i9300/ 
near bottom and
http://thinkwiki.org/wiki/How_to_make_ACPI_work
right above suspend to disk section.

You might want to get more configurable trackpoint with this patch
http://stephen.evanchik.com/kernel/trackpoint/trackpoint-with-synaptics-fix-2.6.12.patch

Good luck
Jiang


On Tue, Aug 30, 2005 at 11:32:35AM -0400, dillon lawson wrote:
> Can you send me a link to the ata patches i have yet to find them.  I 
> get about 3.5hours with mine  as well.
> 
> --dillon
> 
> Jiang Qian wrote:
> 
> >Hi All:
> >I've been tinkering to get the battery lifetime longer on my laptop and 
> >would like to see people's mileage. 
> >
> >I have a T43(2668W12) with 1.86GHz Dothan, ati X300(M22 chip)  Hitachi  
> >7200rpm hard drive and 6cell battery(capacity 51840mWh). I use ubuntu 
> >hoary and a kernel 2.6.12.4 and 0.11 of ibm_acpi.  I patched the kernel 
> >ata drivers to get suspend to ram working
> >
> >What I did to get conserve power: enable dynamic clock xorg, put scaling 
> >governor to conservative(which pretty much keep my computer at 800MHz).  
> >I don't use laptop mode because I worry about the repeated spin up and 
> >spin down destroying HD. 
> >Now some number. I got 17W(3 hours 3 min) if I put screen to dimmest 
> >and turn the fan off. Although I worry turning the fan off what the 
> >heat does to battery(with fan on temperature stabilizes around 54C for 
> >both CPU and GPU and 44C 38C for battery and 38C for HDD. With fan it 
> >does some kind of cycle between 55 and 65C)
> >With fan on and screen to brightest I have 20.3W, i.e. 2hour 33 min.
> >With fan off and screen to brightest I have 19.8W 2hour 37 min.
> >All these are down under gnome and with only light typing, not even web 
> >browsing. This is much lower than 4.5 hour as they advertise!
> >
> >What else I can do to prolong battery time? What kind of number shall I 
> >expect? I got some ideas from
> >http://www.sas.upenn.edu/~vbraun/computing/T41/power.html
> >Although given my computer's more powerful chip should I expect less 
> >battery lifetime than he got? Any more optimization I can do?
> >Thanks a bunch!
> >Jiang
> > 
> >
> 
> -- 
> The linux-thinkpad mailing list home page is at:
> http://mailman.linux-thinkpad.org/mailman/listinfo/linux-thinkpad