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XPS 13 9370 : linux power : standby battery drain
On Linux Fedora 28, the XPS 9730 uses ~ 3% of battery per hour in standby. This drains the battery very quickly.
As of https://www.dell.com/community/Linux-General/XPS-13-9370-Standby-issues-resume-and-indicator/m-p/6206931/highlight/true#M16322 this is due to deep sleep not working properly.
I'm opening a separate thread to the previous one to discuss these issues independently.
This is similar to:
ShedG
33 Posts
0
November 28th, 2018 17:00
Below find my notes on this:
https://www.reddit.com/r/Dell/comments/8b6eci/xp_13_9370_battery_drain_while_suspended/
Edit /etc/default/grub
GRUB_CMDLINE_LINUX_DEFAULT=" mem_sleep_default=deep "
(added mem_sleep_default=deep )
Gets battery drain during sleep to about 1%/hr
My tests indicated about 10% drop/hour before I made this change. You report 3% so I'm not sure the fix is relevant for you. And I'm running Debian Testing.
yala
13 Posts
0
November 29th, 2018 02:00
Hi ShedG,
unfortunately I had tried this before, but missed to add the outcome of this clearly here.
In https://www.dell.com/community/Linux-General/XPS-13-9370-Standby-issues-resume-and-indicator/m-p/6206933/highlight/true#M16323 I had reported back that setting deep sleep kills USB ports and the WiFi adaptor, and is not a worthwile path to move forward on Fedora 28.
ShedG
33 Posts
0
November 29th, 2018 18:00
Interesting. AFAIK WiFi depends on two components. One is the kernel drivers and the other is firmware for the Killer card. (Bluetooth probably depends on these too.) You can find the firmware by following the links at https://www.killernetworking.com/killersupport/driver-downloads/kb/cat/6-linux to their Github repo. Regardless of which distro you're using the latest firmware files should help. I think Ubuntu is fully up to date but I'm not sure about Debian. With the latest kernels and Killer firmware the WiFi seems to be behaving. I still have very occasional problems with BT where the H/W 'disappears' and requires a full power down to restore.
USB woes are baffling. I haven't seen that at all. I wonder if that's a Fedora vs. Debian thing or perhaps BIOS? I'm at 1.5.1 presently.
If you decide to pursue either of these I'd be more than happy to provide comparative information about what's going on with Debian (such as logs following resume etc. ) that might help you to resolve your issues.