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I made a few calls to HP Support, and I was able to solve the heating and battery life issue on my new Presario B1256TU. It turns out that a resetting of the BIOS to defaults would solve things. Now SpeedStep works even at first power-up (without needing to wake up from sleep first).
Next up: making some modifications to the BIOS, to see if things work well even with BIOS changes. I also need to see if disabling the onboard LAN from the BIOS would help extend battery life.
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4 Responses
Vista Update: SpeedStep Now Working · Buwin Technology
May 30th, 2008 at 11:36 am
1[...] Read the rest of this great post here [...]
renmin
May 30th, 2008 at 2:49 pm
2Interesting. I run XP on my B1256TU. Fortunately it doesn’t have any issues with SpeedStep. I addressed the heat issue through undervolting with RMClock. (I used RMClock on my old laptop as well, a Compaq V2310 with an AMD Turion processor.)
How much battery life are you getting now? I get around 2.5 to under 3 hours with Wifi on and 50% screen brightness. I’ve also thought about disabling the LAN and ExpressCard slot in the BIOS to see if it will extend the battery life a bit more.
jhay
May 30th, 2008 at 4:37 pm
3Hmm,. maybe I should start looking into this trick as well. I’m looking for ways to extend the battery life of my c765TU notebook.
I suppose the procedure is the same? Tweaking things in the BIOS?
J. Angelo Racoma
May 30th, 2008 at 4:51 pm
4Renmin, it’s great that you get 2.5+ hours on your B1256TU. My battery meter usually reports 2+ hours, but I guess the most I’ve had so far is 2.5 hours so far. What voltage levels do you use? The T2370 is rated from 1.075 to 1.175 volts, I believe.
Jhay, I don’t think it’s possible to squeeze out more battery juice for the C765TU, because of its Celeron-M processor. It will always run at 100% clock speed. You could try throttling the speed down, but I’m not sure if that will do much difference in terms of battery life.
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