Ubuntu – Does the computer get less battery life with Ubuntu compared to Windows

batterylaptoppower-managementwindows 7

Last year I purchased a Dell Inspiron 5315 laptop shipping with Windows 7 preinstalled. I installed Ubuntu 10.10 alongside it with dual-booting. On upgrading to Ubuntu 11.10, I was upset to find I now get less than one hour of battery life! Windows 7 gives me 2.5 hours of running time.

Is there any possible explanation why my battery is running out faster with Ubuntu? Can anybody tell me better power options?

Best Answer

  • There is a reasonably well known kernel issue with power management on PCI Express systems.

    Try editing your boot-up grub entry to include pcie_aspm=force to the kernel parameters, and seeing if that improves your power consumption.