Optimization for Dell XPS 13 7390 2-in-1 on Ubuntu 19.10 (2019-10-27)

README.md

Bios

Disable:

• thunderbolt → wakeup from suspend (fix in 5.4)
• fingerprint → no driver for Goodix Fingerprint
• camera → no driver for Intel AVStream Camera

Services

Disable:

• iio-sensor-proxy.service → bug in kernel spam logs when using sensors

etc|default|grub

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash mitigations=off mem_sleep_default=deep acpi_osi=Linux"

etc|modprobe.d|dell.conf

options dell-smm-hwmon ignore_dmi=1
blacklist psmouse

etc|modprobe.d|i915.conf

options i915 enable_fbc=1 enable_guc=3 enable_dc=2 enable_psr=1 enable_dpcd_backlight=1 fastboot=1 disable_power_well=0

etc|profile.d|libva_ihd.sh

export LIBVA_DRIVER_NAME=iHD

etc|systemd|user|headphones_hissing.service

[Unit]
Description=Disable hissing sound with headphones
After=pulseaudio.service
PartOf=pulseaudio.service

[Service]
Type=oneshot
ExecStart=amixer -c PCH cset 'name=Headphone Mic Boost Volume' 1

[Install]
WantedBy=pulseaudio.service

etc|udev|rules.d|90-ac.rules

SUBSYSTEM=="power_supply", DRIVERS=="ac", ATTR{type}=="Mains", TAG+="systemd", ENV{SYSTEMD_ALIAS}="/sys/subsystem/power_supply/main_AC", ENV{SYSTEMD_READY}="$env{POWER_SUPPLY_ONLINE}"

usr|local|bin|change-resolution

#!/bin/bash

set -xeu -o pipefail

resolution="$1"
scale="$2"

function get_serial() {
  serial="$(gdbus call --session --dest org.gnome.Mutter.DisplayConfig \
  --object-path /org/gnome/Mutter/DisplayConfig \
  --method org.gnome.Mutter.DisplayConfig.GetResources | awk '{print $2}' | tr -d ',')"
  echo $serial
}

serial=$(get_serial)
gdbus call --session --dest org.gnome.Mutter.DisplayConfig \
  --object-path /org/gnome/Mutter/DisplayConfig \
  --method org.gnome.Mutter.DisplayConfig.ApplyMonitorsConfig \
  $serial 1 "[(0, 0, $scale, 0, true, [('eDP-1', '$resolution', [] )] )]" "[]"

|HOME|.config|systemd|user|low-resolution-on-battery.service

[Unit]
StopWhenUnneeded=yes

[Service]
Type=oneshot
RemainAfterExit=yes
ExecStart=/usr/local/bin/change-resolution [email protected] 2
ExecStop=/usr/local/bin/change-resolution [email protected] 1

[Install]
WantedBy=sys-subsystem-power_supply-main_AC.device

What is 90-ac.rules for? I'm trying to tune my XPS 7390 but no 2 in 1, because I have Win version.
Seems almost all woks out of box, but I noticed high power consumption at standby mode.

What is 90-ac.rules for? I'm trying to tune my XPS 7390 but no 2 in 1, because I have Win version.
Seems almost all woks out of box, but I noticed high power consumption at standby mode.

This is to be able to trigger some systemd units when AC is plugged.
It doesn't do anything about power consumption :/

What is 90-ac.rules for? I'm trying to tune my XPS 7390 but no 2 in 1, because I have Win version.
Seems almost all woks out of box, but I noticed high power consumption at standby mode.

This is to be able to trigger some systemd units when AC is plugged.
It doesn't do anything about power consumption :/

Yeah, I see, but i think options of i915 module can improve power saving. I hope.

Using TLP + kernel 5.5+ can also improve a lot

Has anyone had luck with getting the webcam working? I would imagine it should not be very hard given it works on the 2020 version of the dell xps 13 developer edition which has incredibly similar hardware. Any ideas on how we might use that driver?

Has anyone had luck with getting the webcam working? I would imagine it should not be very hard given it works on the 2020 version of the dell xps 13 developer edition which has incredibly similar hardware. Any ideas on how we might use that driver?

I'd also really really love to use the webcam on the 2019 model.