Install debian on encrypted volume

See https://www.blakecarpenter.dev/installing-debian-on-existing-encrypted-lvm/ The main points:

- expert install
- "Load installer components from CD. From here, you want to select crypto-dm-modules and rescue-mode."
- ctrl+alt+f2 to jump into a shell
- depmod -a
- cryptsetup luksOpen /dev/sda3 debian-crypt
- vgchange -ay
- ls /dev/mapper
control debian-crypt debian-home debian-root debian-swap
- "Hit ctrl+alt+f1 to return to the Debian installer and continue to Partition disks. Select Manual."
- setup partitions/mount points
- stop before Install the GRUB bootloader to a hard disk. ctrl+alt+f2 to jump into a terminal.
- blkid
- nano /target/etc/crypttab
debian-crypt UUID=98...eaa none luks
- "Continue to the end of the installation. When the generating initramfs step appears, the image will be built using the crypttab file you just modified."  

USB Audio not detected after resume. Edifier M60.

Sometimes USB audio device (e.g. Edifier M60 speakers via usb-c connection) is not detected after resume, or after repluging, although

aplay -l

lists the device, the pipewire server does not add it. Restart pipewire:

systemctl --user restart pipewire

If the former does not help, try the following instead:

systemctl --user restart pipewire pipewire-pulse wireplumber

Fix thinkbook 13s ITL2 headphones noise

echo "0x1d 0x707 0x0" > /sys/class/sound/hwC0D0/init_verbs

8bitdo pro 2 hall joysticks calibration issue

8bitdo pro 2 gamepad with hall effect joysticks has an issue that after pressing the left stick it extends (recalibrates) it's value range beyond the range in the unpressed state, so (in my case) ultimate UP (forward) direction does not register as 100%, so e.g. running mode in games becomes unreachable with the extreme stick position (until you push it). There's an undocumented firmware recalibration mode: https://www.reddit.com/r/8bitdo/comments/1dtkoqx/sticks_are_not_aligned_anyway_to_calibrate_this/

  From 8bitdo support about the Pro 2: 
  
  L1+R1+SELECT Hold 10sec start calibration
  
  Rotate both joysticks 3turns *Simultaneously clockwise
  
  Fully press both triggers 3times Press all combination keys again to complete the calibration
  
  Turn-off the controller then turn on again
 

Fedora drivers

Install rpm-fusion package. Install mesa...freeworld drivers.

Transcoding with intel quicksync (qsv) h264 -> hevc

Convert on hardware from h264 to h264 full hd, also compress audio to AAC to make a common .mp4 file.

#!/bin/env bash
# usage: enc.sh <source_file> <quality, e.g. 25, 1..51>
# https://trac.ffmpeg.org/wiki/Hardware/QuickSync
# accepts h264 and transcodes on hardware, tested.
ffmpeg -hwaccel qsv -c:v h264_qsv -i "$1" -init_hw_device qsv:hw -vf 'scale_qsv=1920:1080' -c:a aac -b:a 192K -c:v h264_qsv -global_quality:v $2 -preset:v 1 -profile:v 77 "$1-h264-aac-qsv-1080p-$2.mp4"

Convert to hevc/h265:

#!/bin/env bash
# usage: enc.sh <source_file> <quality, e.g. 25, 1..51>
# https://trac.ffmpeg.org/wiki/Hardware/QuickSync
# accepts h264 and transcodes on hardware, tested.
ffmpeg -hwaccel qsv -c:v h264_qsv -i "$1" -c:v hevc_qsv -global_quality:v $2 -preset:v 1 -profile:v 1 -c:a libopus -b:a 96K "$1-hevc-qsv-$2.mkv"

Encode to VP9 (in software):

#!/bin/env bash
# usage: enc.sh <source_file> <quality, e.g. 30, 0..63>
# https://trac.ffmpeg.org/wiki/Encode/VP9
ffmpeg -i "$1" -c:a libopus -b:a 96K -c:v libvpx-vp9 -b:v 0 -crf $2 -pass 1 -an -f null /dev/null
ffmpeg -i "$1" -c:a libopus -b:a 96K -c:v libvpx-vp9 -b:v 0 -crf $2 -pass 2 "`basename $1`_vp9tp_$2.webm"

Kensington Expert Mouse Linux config

#!/bin/bash
# 

LEFT_HANDED=""

show_help() {
  echo "Usage: [--left]"
  echo "--left = use lefthanded config"
  exit 1
}

parse_args() {
while [[ $# -gt 0 ]]; do
  case $1 in
    --left)
      LEFT_HANDED="yes"
      shift
      ;;
    *)
      show_help
      ;;
  esac
done
}

parse_args $@

MOUSE_NAME="Kensington Expert Mouse"
CHECK=$(xinput | grep "$MOUSE_NAME")

set -e

echo "check=$CHECK"

if [[ -z "$CHECK" ]]; then
    echo "Cannot find the device: $MOUSE_NAME"
    exit 1
fi

TRACKBALL_ID=$(xinput | grep "$MOUSE_NAME" | sed 's/^.*id=\([0-9]*\)[ \t].*$/\1/')

LEFT_TOP=2
LEFT_BOTTOM=1
RIGHT_TOP=8
RIGHT_BOTTOM=3
SCROLL_CLOCKWISE=5
SCROLL_COUNTERCW=4

# LB, LT, RB, SCCW, SCW, 6, 7, RT

MOUSE_LEFT=1
MOUSE_MIDDLE=2
MOUSE_RIGHT=3

# ---

# make scrolling with the ball smooth
SCROLLING_PIXEL_DISTANCE=50

# X clients receive events with logical button numbers, where 1, 2, 3 are usually interpreted as left, middle, right and logical buttons 4, 5, 6, 7 are usually interpreted as scroll up, down, left, right. The fourth and fifth physical buttons on a device will thus send logical buttons 8 and 9. The ButtonMapping option adjusts the logical button mapping, it does not affect how a physical button is mapped to a logical button.

if [[ -n $LEFT_HANDED ]]; then
    echo "using lefthanded config"
    SCROLLING_BUTTON=$RIGHT_TOP
    # LB, LT, RB, SCCW, SCW, 6, 7, RT
    BUTTON_MAP="$MOUSE_MIDDLE $MOUSE_RIGHT $MOUSE_LEFT 4 5 6 7 8"
else
    # right hand settings
    SCROLLING_BUTTON=$LEFT_TOP
    # LB, LT, RB, SCCW, SCW, 6, 7, RT
    BUTTON_MAP="$MOUSE_LEFT 8 $MOUSE_MIDDLE 4 5 6 7 $MOUSE_RIGHT"
fi

# -------
xinput set-prop $TRACKBALL_ID "libinput Scrolling Pixel Distance" $SCROLLING_PIXEL_DISTANCE
xinput set-prop $TRACKBALL_ID "libinput Button Scrolling Button" $SCROLLING_BUTTON
xinput set-prop $TRACKBALL_ID "libinput Scroll Method Enabled" 0, 0, 1
xinput set-button-map $TRACKBALL_ID 1 2 3 4 5 6 7 8 9
echo $BUTTON_MAP
xinput set-button-map $TRACKBALL_ID $BUTTON_MAP