Battery Life + 1 hour
So looking for new ways to extend your laptop battery life?? Just recently I found a great combo that involves using a very cool application called “Jupiter”
You can grab Jupiter from the launchpad PPA @ https://launchpad.net/~webupd8team/+archive/jupiter
I have yet to find a good application that handles “On Demand” mode relatively well. This app clocks down your processors when on battery to their lowest setting and kicks them back up once A/C power is restored. I have used other linux power mgmt tools but haven’t had a great experience. I have a system76 Pangolin and it’s pretty power hungry, it’s pretty much a mobile desktop and during the Natty / Oneiric releases of Ubuntu I was lucky to get 40 minutes on the beast. But that was because everything was running full power, After installing Jupiter and making some additional changes I managed to turn 40 minutes into 2 hours. Not bad eh?
Some of the additional changes I made involved the following:
Taking /var/log and completely mounting it to tmpfs. This way we are writing straight to memory, not needing to bother the disk constant reads/writes. Take note that this causes your logs to clear out at the end of every reboot/shutdown, but I’ve seen improvement.
So first we need to make some modifications in /etc/fstab
tmpfs /tmp tmpfs defaults,noatime,mode=1777 0 0
tmpfs /var/log tmpfs defaults,noatime,mode=1777 0 0
tmpfs /var/tmp tmpfs defaults,noatime,mode=1777 0 0
Save that off
Then lets carry out the following.
$ sudo service rsyslog status // to check if it’s up and running
$ sudo service rsyslog stop
$ sudo rm -rf /tmp/*
$ sudo rm -rf /var/log/*
$ sudo rm -rf /var/tmp/*
$ sudo mount -a
$ sudo service rsyslog start
Now you will notice all system logs will be directed to /tmp. Give it a try for a week or two and see if you notice any difference in your battery life.
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OK this is just great, I know that my battery life is awful and is even worse now so this will be useful to me.
Nice posting, it is really informative, specially for those people who have questions regarding the problem of their laptop batteries. keep up the good work. and I am still expecting for more interesting post.