Could you test with GCC 4.7? You can get it from this PPA: ppa:ubuntu-toolchain-r/test It works on Chromebook and should work on all the other platforms. I saw some pretty substantial performance gains, around 15% in the one thing I tried.
Then we don't know where the power was being measured, if it was on the battery or at the wall. Either will incur an efficiency hit that'll be larger the higher the load is. On tablets and Chromebook ~7.2V batteries are usually used, because they're more efficient for the displays (which typically use the most power) but less efficient for the SoC. On phones the situation is reversed so ~3.7V batteries are used. In this case you'll see less power consumption from the SoC, but either way it doesn't impact its TDP. That along with more power efficient (LPDDR2/3, PoP) and probably lower clocked memory will help save power on phones, and it's possible that the Exynos 5 in the package on Chromebook is a leakier variant.
"Current limitations though of running Ubuntu 12.04 on the Samsung Chromebook is that the touchpad didn't work at all for me (some users have reported success), sound is broken, and there isn't any hardware graphics acceleration at this time."http://blogs.arm.com/software-enable...-3-chromebook/
at the time you posted this Michael
there was already the arm blog you could have used
Posted byAndrew Wafaa, http://forums.arm.com/public/style_i...g/comments.png 6 COMMENTS
19 November 2012
14. The touchpad requires an additional configuration file called 50-touchpad.conf placed into /etc/X11/xorg.conf.d/ Using your preferred text editor create the required file
(I’m using Vim)
sudo vi etc/X11/xorg.conf.d/50-touchpad.conf
Add the contents below
Option "FingerHigh" "5"
Option "FingerLow" "5"
15. To get audio working copy the contents of ...
oh and you probably also missed the ODROID-U: mini-PC with 1.4 GHz quad-core Exynos SoC for $69 re-fresh news too
you should probably get a few of those cheap Exynos4 Quad A9's and add them to your existing cluster to give it a big boost :)
the U2 Prime 1.7GHz Mali-400, 2 GB of memory and x2 Prime 1.7GHz are over clockable to 2gig so worth a try and a front page perhaps
they should keep you busy until the Exynos 5 quad/Octo core arrives at least...