RLovelett

Force RGB pixel format over YCbCr

There are some monitors, in my case Dell U2413, that report having YCbCr support when plugged in over HDMI. My AMD Radeon RX 570 Series video card sees this YCbCr pixel format and then prefers that over the RGB pixel format. The result is that fonts, graphics and other visuals are pixelated and not smooth in Ubuntu.

This actually is not just a Linux problem. A similar problem exists on macOS with the same monitor hooked up over HDMI. In fact an article by John Ruble on the Atomic Object blog called Fixing the External Monitor Color Problem with My 2018 MacBook Pro attempts to fix the exact same thing.

Solution

All of the articles I could find exploring this topic advocate patching the EDID for the monitor. Unfortunately the macOS solution would not work here. Luckily I found a Reddit post that covered how to get it working.

wsvn53

/etc/vpnc/post-connect.d/enable-ping.sh 
---------------------------------------
#!/bin/bash

echo "Connected.";
# enable host ping
while [ ! -z "$(iptables -L | grep icmp-net-unreachable)" ]; do 
	echo "==> delete icmp-net-unreachable";
	iptables -D INPUT -p icmp -m icmp --icmp-type echo-request -j REJECT --reject-with icmp-net-unreachable;
done

we11adam

*.cn	DirectConnection
*tmall*	DirectConnection
.10010.com	DirectConnection
.10050.net	DirectConnection
.115.com	DirectConnection
.115img.com	DirectConnection
.123cha.com	DirectConnection
.126.com	DirectConnection
.126.net	DirectConnection
.163.com	DirectConnection

jonathanmorley

See Also:

• HN Post
• Regex Golf Answers (Gist)
• Best known Regex Golf solutions (Gist)
• Regex Golf (reddit)

Normal

Level	Score	Regex	Credit

zellux

#!/usr/bin/env python

__copyright__ = 'Yuanxuan Wang <zellux at gmail dot com>'

from calibre.web.feeds.news import BasicNewsRecipe
from calibre.ebooks.BeautifulSoup import Tag, NavigableString
from collections import OrderedDict
from contextlib import nested, closing

import json

chen-hongzhi

SecCertificateRef cert = SecCertificateCreateWithData(NULL, (__bridge CFDataRef)certData);
status = SecCertificateAddToKeychain(cert, keychain);

if (status == errSecDuplicateItem) {
    status = errSecSuccess;
}

if (status == errSecSuccess) {
    int allowErr = -2147409654;
    SecPolicyRef x509Policy = SecPolicyCreateBasicX509();

janlay

/*
 * A white-list based PAC without regexp, by @janlay
 * It's just simple and fast.
 * Last update: Oct 20, 2015
 * Special thanks to @Paveo
 */
function FindProxyForURL(url, host) {
    // REPLACE PROXY WITH YOUR OWN'S
    var PROXY = "SOCKS 127.0.0.1:8801;SOCKS5 127.0.0.1:8801;PROXY 127.0.0.1:8800";
    var BLACKHOLE = "127.0.0.2";

roxlu

#include "SSLBuffer.h"

SSLBuffer::SSLBuffer()
  :ssl(NULL)
  ,read_bio(NULL)
  ,write_bio(NULL)
  ,write_to_socket_callback(NULL)
  ,write_to_socket_callback_data(NULL)
  ,read_decrypted_callback(NULL)
  ,read_decrypted_callback_data(NULL)

dav

require 'etc'
require 'fileutils'

# Copies the most recent MAX_IMAGES photos/videos from the device image dir.
# I use Dropbox to sync my device images to my workstation disk
MAX_IMAGES=500

USER_HOME_DIR = Etc::getpwuid.dir
DEVICE_IMAGES_DIR="#{USER_HOME_DIR}/Dropbox/Camera Uploads"
SIMULATOR_IMAGES_DIR="#{USER_HOME_DIR}/Library/Application Support/iPhone Simulator/5.1/Media/DCIM/100APPLE"

uchida

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# CUI Downloader of "Command Line Tools for Xcode"
# by Akihiro Uchida, CC0 dedicated to the public domain
# see http://creativecommons.org/publicdomain/zero/1.0/

import sys, os
import urllib, urllib2, cookielib
from getpass import getpass
from HTMLParser import HTMLParser