Originally posted by fewt
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Mobile Users Beware: Linux Has Major Power Regression
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No heat here
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.
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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?
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Do they test?
This tells us that nobody is testing power consumption except Phoronix
If distributions aren't going to test these kinds of things out then that looks seriously bad on the distributions.
After 15/20 years and still carrying regressions like baggage; it's unbelievable.
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I haven't seen a regression in 2.6.38. In fact, 2.6.38.5 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.
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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 2.6.38.5-1.fc14.i686 #1 SMP Wed May 4 10:52:45 CDT 2011 i686 i686 i386 GNU/Linux
This "issue" .. doesn't exist.
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Originally posted by fewt View PostJupiter depends on Mono, yes. It also uses less than 20MB of resident memory, and 0 CPU time.
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