On 17 November 2015 at 16:28, Nuno Gonçalves <[email protected]> wrote: > > > On Friday, November 13, 2015 at 5:50:23 PM UTC, RobertCNelson wrote: >> >> >> https://github.com/RobertCNelson/ti-linux-kernel-dev/commit/7df6a18cbcd567712edd1e1a4a774742d510dbe3 > > > Under low loads this patch (or something else at 4.1.13-ti-r30), have caused > a dramatic power decrease on the BBB. > > Disabling state1 brings it back to the same board temperature, which makes > it sound like that cpuidle was not working previously. (I was not sure it it > was only the /sys interface that was not available). > > I still couldn't fully determine how this affect real time latencies, but > hope to provide data soon.
Good to know, thanks. I am trying to bring power down, and have been measuring the current going into the BBB through the 5V socket with no USB cable connected. In my first measurement kernel idle was 300 mA. Then I installed cpufreputils and that brought the current down to 230 mA because - unexpectedly - just installing the Debian package changed the CPU mode to "on-demand". Today I managed to bring the current down a further 20 mA (to about 210 mA) by disabling HDMI in boot/uEnv.txt. I am curious now to see how much power cpuidle will save - once I have a kernel with it. -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
