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How to set for convenience after setup, on Raspbian

How to set for convenience after setup, on Raspbian

I wrote down how to set for convenience after setup, on below.
Before starting, I described below about the peripherals of the Raspberry Pi.

  • Power supply - Verbatim 5 Ports Multi-Charger with Qualcomm 3.0 & Type-C (QC-020PT)
  • Keyboard - Happy Hacking Pro 2 ( PD-KB400B )
  • Mouse - ANKER A7809012
  • Monitor - TV or LG 32UD59
  • Micro SD Card - Sandisk Ultra 32GB


What is the lightning volt symbol on the right top of screen

Please check below quote. It is from the Raspberry Pi Blog.

Finally on the subject of icons, in the past if your Pi was working particularly hard, you might have noticed some yellow and red squares appearing in the top-right corner of the screen, which was indications of overtemperature or under voltage. These have now been replaced with some new symbols that make it a bit more obvious what’s actually happening; there’s a lightning bolt for under voltage, and a thermometer for overtemperature.

Please check your power supply and charging cable ( USB cable ).

Raspberry Pi needs 5V / 2.5A DC.


To speed up mouse moving

This section is not related to the above image. If you did not feel any problem-related mouse moving, please pass this section.

It will help you if mouse cursor keeps moving or mouse moving speed is so slow, on GUI mode after booting.

  • Please find cmdline.txt on /boot.
  • Just type usbhid.mousepoll=0 on last of cmdline.txt
  • reboot with 'shutdown -r now'

Please check below link if you need detail information.


Some characters are not displayed correctly

Subtitle: how to install new fonts and use them.


Some letters are shown as a rectangle in a red round box of the above images. I am Korean, so I often face many websites written Korean during web-surfing. Raspbian supports a few fonts so that you should install fonts if you need more fonts.

  • make .fonts directory on /home/pi
  • copy fonts to /home/pi/.fonts

Above procedures are enough. Of course, some application needs setting such as selection fonts or languages.


How to input other languages instead of English

I need to type Korean and Japanese. For that, I should install iBus. iBus is IME[1]

On terminal,
sudo apt-get install ibus-anthy;
sudo apt-get install ibus-hangul
sudo apt-get install ibus;ibus-daemon;ibus-setup

On the Status bar, iBus will be displayed with symbol 'EN'.

  • Press right button of the mouse on symbol 'EN'
  • You might be able to see 'Preferences' on the menu.
  • After above procedures, just configure setting to your needs.


How to increase swap memory

The default size of swap memory is 100MB, sometimes, however, 100MB is rarely not enough if you use Raspberry Pi as desktop. Just one file modification is required to increase swap memory.

  • Please look for CONF_SWAPFILE=100 on /etc/dphys-swapfile.
  • The 100 means 100MB, so change 100 to 2048 if you need 2GB swap memory.


More helpful articles will be added in this page.

  1. IME means 'Input method Editor' - ↩︎



I know what I know nothing.