dudeitssm

The meaing of the v-com (vcom) value for Panasonic LCD/LED TV under the service mode.

Wonder why the LED TV screen flicking like crazy and look washed out in white noise? Particularly when you enter the service mode for the first time?

With a wrong v-com value, the TV screen will look washed out with continue flickering.

When the vcom value was wrong, you cannot even see the service menu text clearly. The screen just flick like crazy. When you getting close to the correct value of the vcom, the text on the service menu will became clearer and clearer with a relatively steady background.

In one case, a vcom value around 0x60 gives better result.

Configuring the Digispark ATTINY85 board for Arduino IDE and upgrading the bootloader

Warning: this document has to be updated by pointing to https://github.com/SpenceKonde/ATTinyCore

This note describes the configuration of an ATtiny85 based microcontroller development board named Digispark and similar to the Arduino line. It is available in many online marketplaces for roughly 1 dollar (e.g., Ebay, Amazon, AliExpress) and is shipped fully assembled, including a V-USB interface (a software-only implementation of a low-speed USB device for Atmel's AVR microcontrollers). Coding is similar to Arduino: it uses the familiar Arduino IDE and is already provided with a ready-to-use bootloader (

How to flash coreboot to the thinkpad x60 the proper way

-> https://blog.aheymans.xyz/old-how-to-flash-coreboot-to-the-thinkpad-x60-the-proper-way/ is more up to date

What is so special about the x60 when running vendor bios?

Vendor BIOS write protects its bootblock, which means the lowest 64K of the flash can't be modified

This is a problem since the first code that runs on the CPU comes from there and if we ever want to run coreboot the cpu must start with coreboot code. This write protection is set in the PBR (protect bios range) registers on the southbridge, there is currently no known way to change them back once they are locked by setting the SPI Configuration Lock-Down bit.

Reddit post (Archived)

Table of Content

What to expect?
- Some TLDR about the idea behind
Prerequisites
- Hardware
- System & Software
Update: Attention for MUXless laptop

Installing Windows 10 to an external drive without a Windows host

The long story

We were talking at the office about having a LAN Party and playing some old school games like Age of Empires and Starcraft. The issue is that I have Linux installed. I didn't want to ruin everyone else's fun by having random crashes, out-of-sync errors and similar stuff using Wine, and I didn't want to do the dual boot dance, so I figured out that the best option was to install Windows to an external drive.

Introduction

I often find myself ssh'ing into my servers and checking my systemd service logs with $ journalctl -f -u {name}.service. One day I got tired of this and wanted all of my important logs in once place (Amazon AWS Cloudwatch). To my dismay, there weren't any real good tutorials on how to do so. So, voilà.

Steps

Overall, it's a fairly simple process consisting of the following few steps.

1. Modify the service file

Open the service file with $ sudo vi /lib/systemd/system/{name}.service

Modify the [Service] section:

All credits go to by Bryan Roessler for his original post that I followed on how to setup LetsEncrypt wildcard certificate auto-renewal with Namecheap. I highly recommend you read his tutorial first and if you bump into issues, check out this gist next.

Unfortunately the original article is not up-to-date and doesn't have the option to leave comments so I can't communicate with the author for updates so I decided to write the updates in a Gist. I highlighted the sections that required an updated with Correction #:. I managed to get the correct setup with the help of the amazing guys at LetsEncrypt community. Here's the help thread.

Set up acme-dns

Download acme-dns from https://github.com/joohoi/acme-dns/releases
Move the binary somewhere sensible since we will be using

Alpine Linux Installation on ZFS Root with grub on UEFI

References [ ref1 | ref2 | ref3 ]
Boot from alpine-extended [ download ]
login as root without any password

setup network interfaces and start networking:

setup-interfaces
/etc/init.d/networking start

add, config, and enable openssh:

	# ========================================================
	# Setup a Dumb AP, Wired backbone for OpenWRT / LEDE
	# ========================================================
	# Set lan logical interface as bridge (to allow bridge multiple physical interfaces)
	uci set network.lan.type='bridge'
	# assign WAN physical interface to LAN (will be available as an additional LAN port now)
	uci set network.lan.ifname="$(uci get network.lan.ifname) $(uci get network.wan.ifname)"
	uci del network.wan.ifname
	# Remove wan logical interface, since we will not need it.
	uci del network.wan

	SSH Login as openvpnas user

	$ ssh openvpnas@<open-vpn-server-ip>
	$ cd /usr/local/openvpn_as/scripts/ # Go to OpenVPN AS Scripts directory
	$ sudo ./sacli --user USERNAME GoogleAuthRegen # Replace USERNAME with username to get a new Google Authenticator Secret

	Source: https://forums.openvpn.net/viewtopic.php?t=15366