On Fri, Apr 13, 2018 at 11:36:03AM +0530, Pierre Neidhardt wrote:
I just ran a `guix system reconfigure` yesterday and Guix pulled Linux 4.16.1. Upon reboot, my laptop's battery time had changed from 9h+ to 3h+! Quite a dramatic regression indeed... General usage (startup time, etc.) seems to be somewhat slower as well. As a test, I ran another system reconfigure, changing only the kernel version: now on 4.14.33, I'm back to 9h+. Does anyone know something about this or should I reach out for the Linux mailing list? Note that before installing GuixSD, I was running Void Linux with kernel ~4.14.5 (off the top of my head) and battery time was 12h+. This might be due to the discrete Nvidia card which was completely shut off by default, while it's now running with nouveau on GuixSD but I don't know how to turn it off. Insights?
I'm not aware of any regression but I'd recommend to install powertop and check, which processes are preventing CPU from switching to power saving modes. Sometimes it provides interesting results - I usually can spend like 40% more time on battery by closing Icecat and Pavucontrol. It also can help you with tuning common power management controls. Best regards, S_W
signature.asc
Description: Digital signature