On Thu, Feb 01, 2018 at 01:16:55PM -0500, Bastien Nocera wrote: > > > ----- Original Message ----- > > On Thu, Feb 01, 2018 at 12:34:50PM +0100, Hans de Goede wrote: > > > Hi All, > > > > > > For the "Improved Laptop Battery Life" feature: > > > https://fedoraproject.org/wiki/Changes/ImprovedLaptopBatteryLife > > > > > > I'm working on for Fedora 28 I would like to also try and enable > > > Panel Self Refresh on laptops with Intel graphics, some quick tests > > > have shown this to save another 0.5W (when idle / nothing on the > > > screen changes). This is currently off be default because it is > > > known to cause issues on some devices. So I think we will probably > > > need a white- or black-list. But first we need more data on this. > > > > > > If you can spare 10 minutes, please see my blogpost for how to test > > > this and send me a mail with the info request in the blogpost: > > > https://hansdegoede.livejournal.com/18653.html > > > > Hi Hans, > > > > I didn't exactly play with the psr like you asked, but your blog intrigued > > me to play with powertop again. > > > > On my Dell 5510 laptop, which has two graphics chips (intel for display, > > nvidia for external displays), setting the following to good: > > > > Runtime PM for PCI Device NVIDIA Corporation GM107GLM [Quadro M1000M] > > > > dropped me from 14W down to 6-7W. And doubled my battery life. Considering > > I normally don't connect up the external display, I find this a huge > > savings. > > > > So indirectly I want to say thank you! > > FWIW, switcheroo-control is supposed to turn off the discrete device on boot, > so you wouldn't need to do this. But it doesn't work with Secure Boot enabled > because of the location of the vga_switcheroo in /sys (under debug). I don't think I have secure boot enabled. But good to know switcheroo-control exists! Cheers, Don _______________________________________________ kernel mailing list -- kernel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to kernel-leave@xxxxxxxxxxxxxxxxxxxxxxx
