xubuntu 18.04 mouse sensitivity fix

If GUI mouse sensitivity settings don't work try using commands:

> xinput

 Will output:

Virtual core pointer                        id=2    [master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer                  id=4    [slave  pointer  (2)]
⎜   ↳ Logitech USB Receiver                       id=9    [slave  pointer  (2)]
⎜   ↳ Logitech USB Receiver Consumer Control      id=10    [slave  pointer  (2)]
⎜   ↳ Logitech USB Laser Mouse                    id=15    [slave  pointer  (2)]

Remember those id's or use "Logitech USB Receiver" and "Logitech USB Laser Mouse" device names in the following commands.

> xinput list-props 'Logitech USB Laser Mouse'

Device 'Logitech USB Laser Mouse':
    Device Enabled (155):    1
    Coordinate Transformation Matrix (157):    1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
    libinput Natural Scrolling Enabled (289):    0
    libinput Natural Scrolling Enabled Default (290):    0
    libinput Scroll Methods Available (291):    0, 0, 1
    libinput Scroll Method Enabled (292):    0, 0, 0
    libinput Scroll Method Enabled Default (293):    0, 0, 0
    libinput Button Scrolling Button (294):    2
    libinput Button Scrolling Button Default (295):    2
    libinput Middle Emulation Enabled (296):    0
    libinput Middle Emulation Enabled Default (297):    0
    libinput Accel Speed (298):    1.000000
    libinput Accel Speed Default (299):    0.000000
    libinput Accel Profiles Available (300):    1, 1
    libinput Accel Profile Enabled (301):    1, 0
    libinput Accel Profile Enabled Default (302):    1, 0
    libinput Left Handed Enabled (303):    0
    libinput Left Handed Enabled Default (304):    0
    libinput Send Events Modes Available (274):    1, 0
    libinput Send Events Mode Enabled (275):    0, 0
    libinput Send Events Mode Enabled Default (276):    0, 0
    Device Node (277):    "/dev/input/event11"
    Device Product ID (278):    1133, 49257
    libinput Drag Lock Buttons (305):   
    libinput Horizontal Scroll Enabled (306):    1

We need to set 'libinput Accel Speed' property to 1.0 value for maximum speed.

> xinput set-prop 'Logitech USB Laser Mouse' 'libinput Accel Speed' 1.0

Make a bash script and add it to "Session and Startup":

#!/bin/bash
#xinput set-prop 15 298 1.0
#xinput set-prop 9 298 1.0

xinput set-prop 'Logitech USB Laser Mouse' 'libinput Accel Speed' 1.0
xinput set-prop 'Logitech USB Receiver' 'libinput Accel Speed' 1.0

ubuntu avahi fix for Belarus/Beltelecom/Byfly

If there's "Avahi Service discovery disabled" popup displayed, check
"host -t SOA local".
If there's something like "local has SOA record local. root.mgts.by", you can make avahi ignore that wrong configuration via editing /etc/default/avahi-daemon:

AVAHI_DAEMON_DETECT_LOCAL=0 

xubuntu 18.04 installing with nvidia graphics, tearing fixes

Before installing (running LiveCD/USB)

Edit GRUB options in the live-cd menu by adding "nomodeset" argument to the  kernel parameters string.

After installing

Repeat "nomodeset" option as described above before the first boot.

1. "apt install nvidia-driver-435"
2. Reboot
3. In "NVidia X Server Settings -> X Server Display Configuration -> Advanced..." switch on "Force Composition Pipeline".
4. Enable XFCE compositor (Menu->Window Manager Tweaks->Compositor->Enable display compositing)
5. Enable the "Synchronize drawing to the vertical blank" option in the "Window Manager Tweaks" "Compositor" tab.