HP ProBook 440 G4, Ubuntu 17.04 Nvidia Prime and SecureBoot

Short review:

The Display is way better than other reviews state.
Yes, it’s bad in direct sunlight, but I can live with that.

With the brightness turned up I’ll get about 8h of battery while writing in LATEX or Markdown and occasionally browsing in Chrome.

The HDD slot is a slim one (7mm height).

Secureboot with Nvidia Prime / Optimus / nvidia-prime

This will sign all your new modules automatically on a new kernel.

Reminder: keep your secret key save, e.g. encrypt your harddrive.

Based on: https://gist.github.com/Garoe/74a0040f50ae7987885a0bebe5eda1aa

# Place all files in ~/.ssl folder

mkdir ~/.ssl
cd ~/.ssl

# Generate custom keys with openssl

openssl req -new -x509 -newkey rsa:2048 -keyout MOK.priv -outform DER -out MOK.der -nodes -subj „/CN=Owner/“

Create file: sign-all-modules: (replace username with yours)

#!/bin/bash

echo „Signing the following modules“
for filename in /lib/modules/$(uname -r)/updates/dkms/*.ko; do
/usr/src/linux-headers-$(uname -r)/scripts/sign-file sha256 /home/<USERNAME>/.ssl/MOK.priv /home/<USERNAME>/.ssl/MOK.der $filename

echo „$filename“
done

 

# INSTALL FILE TO RUN AFTER KERNEL UPGRADE

sudo install ~/.ssl/sign-all-modules /etc/kernel/postinst.d/

#Add the key to the trusted keys database

sudo apt-get install mokutil
sudo mokutil –import ~/.ssl/MOK.der

# install the nvidia driver

Follow https://help.ubuntu.com/community/BinaryDriverHowto/Nvidia, but don’t disable secure boot

# run the script once

cd /etc/kernel/postinst.d/

sudo  ./sign-all-modules

# reboot

and install keys in EFI

Switch Graphics Cards

Just install PRIME INDICATOR PLUS – http://www.webupd8.org/2016/10/prime-indicator-plus-makes-it-easy-to.html

sudo add-apt-repository ppa:nilarimogard/webupd8
sudo apt update
sudo apt install prime-indicator-plus

Activate Sleep/Standby on lid close

https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1574120

edit your /etc/systemd/logind.conf
add: HandleLidSwitchDocked=suspend

Side effect: your laptop will sleep with the lid closed and an external monitor attached.

Three Finger as Middle Mouse Button

Klick the touchpad on the upper right corner.

OR:

run:

synclient ClickFinger3=2
and
synclient TapButton3=2

make it permanent:
add the commands to the file ~/.profile

Save Power

install laptop-mode-tools: https://wiki.ubuntuusers.de/laptop-mode-tools/

in English with gui: http://www.webupd8.org/2014/01/install-laptop-mode-tools-164-with.html

or you can use sudo powertop –auto-tune
and make those changes permanent: https://askubuntu.com/questions/112705/how-do-i-make-powertop-changes-permanent

 

Mute Button won’t change color

known bug, but a workaround exists for kernel >= 4.12

download and install kernel from: http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.13-rc1/

(sudo dpkg -i * in the kernel-dl folder)

then

add „options snd-hda-intel model=mute-led-gpio“ in „/etc/modprobe.d/alsa-base.conf

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1683277

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