On Fri, Feb 02, 2018 at 10:11:03AM +0100, Hans de Goede wrote: > Hi, > > On 01-02-18 15:59, Don Zickus wrote: > > 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! > > Interesting, nouveau.runpm defaults to 1, so I wonder why it is not doing > this by default on your system. Can you file a bug against xorg-x11-drv-nouveau > please and put the following people in the Cc: I did, bz: https://bugzilla.redhat.com/show_bug.cgi?id=1541495 This may be the reason: [14321.977201] pci 0000:01:00.0: optimus capabilities: enabled, status dynamic power, hda bios codec supported [14321.977205] VGA switcheroo: detected Optimus DSM method \_SB_.PCI0.PEG0.PEGP handle [14321.977207] nouveau: detected PR support, will not use DSM [14321.977236] nouveau 0000:01:00.0: enabling device (0000 -> 0003) [14321.977376] nouveau 0000:01:00.0: unknown chipset (ffffffff) [14321.977381] nouveau: probe of 0000:01:00.0 failed with error -12 > > Ben Skeggs <bskeggs@xxxxxxxxxx> > Lyude Paul <lyude@xxxxxxxxxx> > Hans de Goede <hdegoede@xxxxxxxxxx> > > Note Lyude works from the Westford office, not sure where you are located, > but if you're also in Westford you might just want to drop by her desk :) She switched to the Boston office, so I can't walk over anymore. But I can still reach out to her. Thanks! Cheers, Don _______________________________________________ kernel mailing list -- kernel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to kernel-leave@xxxxxxxxxxxxxxxxxxxxxxx
