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Mobile Users Beware: Linux Has Major Power Regression
I am a novice mechanic and Linux challenged. But I decided to run a test. Using the PartedMagic liveCDs 5.10 and 6.0 (with 2.6.37 and 2.6.38) I used the Psensor Gui to determine that core temperature readings at idle were virtually identical. (The 5th reading, Mobo?, was frozen at 30* in all tests.)
ECS K8 board with MPC 67, BE2300 (X2 @1900 and 45W TDP).
Next I opened System Stability Tester (GUI) and ran Pi to 4 Megs. Core temps increased but were nearly identical across the 2 kernels. This data could be unreliable for a number of reasons.
I do see that AMD's AM3+ products will have a radical new power flow that increases amperage. (See bit-tech.net review of future Asrock AM3+ boards.) If AMD is doing this then it is quite possible that Intel has similar changes planned. Could the kernel team be anticipating future hardware in 2.6.38?
I haven't seen a regression in 2.6.38. In fact, 18.104.22.168 is the best battery life I can remember. I get around 6hrs of full use from Latitude, earlier it was somewhere between 5-6hrs. With videos, I can run it for 4 hours.
So, this post looks wrong to me, particularly because it has "Beware" word in it. But I will wait for the identification of commits which was promised in this thread.
I watched a couple of movies during my flight(s) this week and saw fantastic battery life. At Summit, I used my Netbook almost every day with WIFI on for hours at a time sometimes, and it still had ~60% battery life left when I put it on the charger. When I landed at home last night after watching 2 movies, it still reported ~7 hours of juice
Linux mechan 22.214.171.124-1.fc14.i686 #1 SMP Wed May 4 10:52:45 CDT 2011 i686 i686 i386 GNU/Linux
Jupiter depends on Mono, yes. It also uses less than 20MB of resident memory, and 0 CPU time.
20MB is quite a bit of memory on my eeepc. What advantage does Jupiter provide over laptop-mode-tools? Seems like most everything Jupiter does, so can laptop-mode-tools, without requiring an extra 20MB of memory usage.. and if Jupiter uses 20MB, how much extra memory does the mono-runtime use? Most mono programs I've used seem to require additional memory for the mono-runtime.