Hi Hans, thank you very much for working on this! Forgot to give some feedback before… I tested your packages for Fedora 27 with my ThinkPad T450s with Crucial MX100 (512GB variant, one of the affected SSDs failing with min_power setting) and TLP. According to powertop it saves about 1.1W in idle compared to normal medium_power. I will do the formal test procedure and add it to the wiki within next days. Greetings, Christian On 22/12/17 17:56, Hans de Goede wrote: > Hi All, > > As part of: > https://fedoraproject.org/wiki/Changes/ImprovedLaptopBatteryLife > I'm pushing a change to the Fedora Rawhide kernel to enable the new > med_power_with_dipm sata link powermanagement policy by default on > mobile Intel chipsets (Laptops, NuCs, etc.). > > The good news about this change is that on laptops using a sata disk > it will typically save about 1W - 1.5W of power when the laptop is idle. > > The bad news is that the min_power policy is known to cause data > corruption > with some disks (has been reported with older sandisk ssds and some > crucial > ssds). The new med_power_with_dipm sata lpm policy mirrors the default > Windows IRST lpm settings, so it should be safe to use, but the proof is > in the pudding. > > I've done a blog post a while back asking users to test > this: https://hansdegoede.livejournal.com/18412.html and here is a list > of successfully tested systens + disks: > https://fedoraproject.org/wiki/Changes/ImprovedLaptopBatteryLife#How_To_Test > > > So far no problems have been reported but if you're running rawhide now > would be a good time to make sure your backups are in order before > upgrading to the next rawhide kernel. > > TL;DR: The next rawhide kernel build contains SATA changes which _may_ > cause disk corruption, they shouldn't, but please check your backups > before updating. > > Regards, > > Hans > _______________________________________________ > devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx > To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx
