[ltp] poll: battery life under T43

[Greg Macek]

Jiang Qian wrote:
> 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

Does anybody here know if these patches have been incorporated into
distro kernels, like Fedora Core 4? I'd prefer not to deal with kernel
recompiling on my daily work computer. Can't afford the downtime.

Greg