I'm an Ubuntu user for about a year. So far, I've tried Linux Mint (Nadia & Olivia) and Ubuntu 12.04 and 13.10. Currently I'm on 12.04 LTS.
On all of the operations system I used, I experienced the same problem - battery lasts only for 15 minutes while unplugged.
I've tried to solve this problem with following tricks:
- Jupiter and TLP. With Jupiter, I was able to get about 3 minutes more.
- Changing nouveau graphics drivers with proprietary NVIDIA (my graphics card is GeForce G 105M). Problem hasn't been solved, and graphics started behaving quite strange, so I switched back.
- Disable bluetooth and wifi by hardware switch. No result.
- As proposed here I tried
sudo powertop-1.13 -d -t 60 > powertop.logand got the following output:
55.4% (912.3) [uhci_hcd:usb8, eth1] <interrupt> 12.3% (202.4) chromium-browse 6.5% (106.4) swapper/1 6.0% ( 98.5) alsa-sink 5.3% ( 88.1) [Rescheduling interrupts] <kernel IPI> 4.1% ( 67.0) Xorg 2.9% ( 48.2) PS/2 keyboard/mouse/touchpad interrupt 2.6% ( 43.4) swapper/0 0.0% ( 0.2)D BrowserBlocking 1.1% ( 17.7)D transmission-gt
Does it mean that the problem is strictly related to the USB driver? Do I need to disable uhci_hcd?