3 04 2018

Login Screen:
i don’t want the hidpi scaling here, because it’s getting to big, thus:

sudo vi /usr/share/glib-2.0/schemas/org.gnome.desktop.interface.gschema.xml

change

<key name="scaling-factor" type="u">
<default>0</default>

to

<key name="scaling-factor" type="u">
<default>1</default>

Touchpad / Trackpad
I’m using the synaptics driver, same settings as with my T450s. I had to disable the Trackpoint in BIOS to make it work, please have a look on Arch Wiki for other/better solutions: https://wiki.archlinux.org/index.php/Lenovo_ThinkPad_X1_Carbon_(Gen_6)

#!/bin/bash

#1920x1080 -> 4.5
#2560x1440 -> 6.0
synclient MaxSpeed=6.0

#1920x1080 -> 0.25
#2560x1440 -> 0.333
synclient MinSpeed=0.333

synclient AccelFactor=0.015
synclient RightButtonAreaLeft=4500
synclient RightButtonAreaTop=3500
synclient RightButtonAreaBottom=5000
synclient FingerLow=25
synclient FingerHigh=30

Linux Intel 8265 WiFi driver (iwlwifi):
As you can see at https://www.intel.com/content/www/us/en/support/articles/000005511/network-and-i-o/wireless-networking.html you need a Linux 4.6+ kernel for WiFi support. Currently Elementary OS is using a 4.4 kernel, but you can use UKUU for easy kernel upgrades: https://www.makeuseof.com/tag/upgrade-kernel-ukuu-ubuntu/. I’ve installed 4.16.0 and iwlwifi is working nicely.

Xfce hi-DPI settings
Einstellungsbearbeitung -> xsettings -> Xft -> DPI to 135

Thunderbird Mail
Open Preferences -> Advanced -> Config Editor and change
layout.css.devPixelsPerPx
to
1.3

BIOS upgrade
See https://pcsupport.lenovo.com/at/en/downloads/DS502282 and https://blog.b-nm.at/2017/01/06/lenovo-thinkpad-t450s-bios-update-with-bootable-usb-memory-stick-drive/
See also: Spectre/Meltdown Checker

VMware workstation 12 and 14: requires gcc 7.2.0
See https://launchpad.net/~ubuntu-toolchain-r/+archive/ubuntu/test

If you see VMware suck at “Waiting for connection”, try running “sudo vmware” this did fix it for me and others. (Source: https://communities.vmware.com/thread/573634)

UNDERVOLTING
/etc/lenovo-fix.conf:

# All voltage values are expressed in mV and *MUST* be negative (i.e. undervolt)! 
[UNDERVOLT.BATTERY]
# CPU core voltage offset (mV)
CORE: -90
# Integrated GPU voltage offset (mV)
GPU: -60
# CPU cache voltage offset (mV)
CACHE: -90
# System Agent voltage offset (mV)
UNCORE: -60
# Analog I/O voltage offset (mV)
ANALOGIO: 0

# All voltage values are expressed in mV and *MUST* be negative (i.e. undervolt)!
[UNDERVOLT.AC]
# CPU core voltage offset (mV)
CORE: -90
# Integrated GPU voltage offset (mV)
GPU: -60
# CPU cache voltage offset (mV)
CACHE: -90
# System Agent voltage offset (mV)
UNCORE: -60
# Analog I/O voltage offset (mV)
ANALOGIO: 0

The machine learning algorithm cheat sheet Linux toolchain test builds (e.g. gcc versions)