TBog

Arch linux zram

https://github.com/Nefelim4ag/systemd-swap

Changes

• only one zram device
• predict zram size based on compression algorithm
• set mem_limit for zram

Paths

• /usr/bin/systemd-swap

TBog

01:56:41.182 29163-29163 HwViewRootImpl                    I  removeInvalidNode all the node in jank list is out of time
01:56:46.218 29163-29163                                   I  removeInvalidNode all the node in jank list is out of time
01:56:52.759 29163-29163                                   I  removeInvalidNode all the node in jank list is out of time
01:57:01.792 29163-29163                                   I  removeInvalidNode all the node in jank list is out of time
01:57:06.325 29163-29163                                   I  removeInvalidNode all the node in jank list is out of time
01:57:24.958 29163-29163                                   I  removeInvalidNode all the node in jank list is out of time
01:57:37.036 29163-29163                                   I  removeInvalidNode all the node in jank list is out of time
01:57:45.599 29163-29163                                   I  removeInvalidNode all the node in jank list is out of time
01:57:48.609 29163-29163                                

TBog

In recent years, the trend of cheating customers by unscrupulous Chinese sellers is gaining momentum with enormous speed.

H2testw

With H2testw, you can write and read how much data the storage device is actually capable of holding. This can work with network drives, hard drives, SD cards and USB sticks. https://www.softpedia.com/get/System/System-Miscellaneous/H2testw.shtml

AxoFlashTest

You'll need Administrator rights to run it, but thanks to this the process of testing is so fast that you'll be provided with the real information about your media health and speed in about 5 minutes. You can measure speed of your media and you can recover it in one click if it's fake. https://flashtest.alexkhoroshev.ru/?lang=en

TBog

Add the linux boot option from Windows

see https://www.linuxquestions.org/questions/linux-general-1/using-bcdedit-to-configure-a-multiboot-system-and-add-linux-4175644308/

Enter Command Prompt (admin) and use bcdedit

• List entries
  bcdedit /enum firmware

• Copy UEFI entry of "Windows Boot Manager" to create a new entry for Ubuntu:

TBog

#!/usr/bin/env bash

#####
#   Generate a PNG file to use in i3lock
#       we have 2 monitors
#           1. resolution 1440x2560 at offset +0+0
#           2. resolution 1920x1200 at offset +1440+1100
#####

# get 2 random files from this folder

TBog

How to see what packages need an update without side-effects

The reason for not running pacman -Sy is to avoid installing packages from different package database updates.

Example: It's 5 days later when you've forgotten you ran pacman -Sy and run pacman -S nvidia that you're likely to break something

Solution

source The bash script checkupdates, included with the pacman-contrib package, provides a safe way to check for upgrades to installed packages without running a system update at the same time.

see: System maintenance

TBog

How can instantaneously extract text from a screen area using OCR tools?

1. copy screen_region_ocr.sh file to your home folder
2. chmod +x ~/screen_region_ocr.sh to make it executable
3. copy screen_region_ocr.desktop to ~/.local/share/applications/ (change Exec path)

Dependencies: tesseract imagemagick spactacle xsel

You can now run Screen Region OCR from your application launcher, select a screen region then paste (Ctrl+V) the OCRed text where you need it

TBog

The next time X crashes, don't hit the hard reset button before trying a few other things first:

Try shutting down X gracefully with <Ctrl>+<Alt>+<Backspace>. You may have to first reconfigure your OS to re-enable this key combo, which recent distros have turned off by default. Instructions here: http://askubuntu.com/questions/367983/how-do-i-enable-ctrl-alt-backspace-to-kill-the-x-server If that doesn't work, try switching to a TTY console with <Ctrl>+<Alt>+<F1> and do:

reboot

or

poweroff

TBog

#!/bin/bash

UNPACK_THEN_EXIT=""
CLEANUP="yes"
TIMING="yes"
filename=""

POSITIONAL=()
while [[ $# -gt 0 ]]
do

TBog

Lenovo IdeaPad 5

Tips and tricks

Taken from https://wiki.archlinux.org/index.php/Lenovo_IdeaPad_5_14are05

Fix sleep issue

Look for S3 sleep fix here: https://wiki.archlinux.org/index.php/Lenovo_IdeaPad_5_14are05#Suspend_issues_(S3_sleep_fix)

Setup performance mode and battery toggles

1. install acpi_call (or acpi_call-lts for LTS kernel, acpi_call-dkms for other kernels)