Disabling Bluetooth on Raspberry Pi

This post shows steps to 1) disable on-board Bluetooth and 2) disable Bluetooth completely. I tested the steps with Raspbian Stretch (November 2017 version).   Disabling on-board Bluetooth The steps below shows how to disable on-board Bluetooth and related services.┬áThose steps also disable loading the related kernel modules such as bluetooth, hci_uart, btbcm, etc at… Continue reading “Disabling Bluetooth on Raspberry Pi”

Lightning Bolt (Under-Voltage Warning) on Raspberry Pi

If a lightning bolt image appears in the top-right corner of the screen, it means Raspberry Pi is not getting enough voltage (4.65V according to this forum post).┬áTo prevent it from showing up, there are two options.   1) Replace Power Supply and/or Cable (Recommended) In most cases, it’s due to the power supply and/or… Continue reading “Lightning Bolt (Under-Voltage Warning) on Raspberry Pi”

Disabling IPv6 Kernel Module on Raspbian Stretch

I’m using Raspbian Stretch Lite (September 2017 version) and for some reason, wanted to disable IPv6 kernel module, which is loaded by default. Basically, it can be done by blacklisting the kernel module. [1] Here is steps I took.   1. Check already loaded modules (Optional) You can check already loaded modules by ‘lsmod’ command.… Continue reading “Disabling IPv6 Kernel Module on Raspbian Stretch”