peppergrayxyz

QEMU with VirtIO GPU Vulkan Support

With its latest reales qemu added the Venus patches so that virtio-gpu now support venus encapsulation for vulkan. This is one more piece to the puzzle towards full Vulkan support.

An outdated blog post on clollabora described in 2021 how to enable 3D acceleration of Vulkan applications in QEMU through the Venus experimental Vulkan driver for VirtIO-GPU with a local development environment. Following up on the outdated write up, this is how its done today.

Definitions

Let's start with the brief description of the projects mentioned in the post & extend them:

Atrate

#!/bin/bash --posix

# ------------------------------------------------------------------------------
# Copyright (C) 2024 Atrate
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#

kj800x

preface: Posting these online since it sounds like these notes are somewhat interesting based on a few folks I've shared with. These are semi-rough notes that I basically wrote for myself in case I ever needed to revisit this fix, so keep that in mind.

I recently bought an LG ULTRAGEAR monitor secondhand off of a coworker. I really love it and it's been great so far, but I ran into some minor issues with it in Linux. It works great on both Mac and Windows, but on Linux it displays just a black panel until I use the second monitor to go in and reduce the refresh rate down to 60 Hz.

This has worked decent so far but there's some issues:

• It doesn't work while linux is booting up. The motherboards boot sequence is visible just fine, but as soon as control is handed over to Linux and I'd normally see a splash screen while I'm waiting for my login window, I see nothing.
• It doesn't work on the login screen. This would be fine if login consistently worked on my second screen, but I need to manually switch

akihikodaki

Linux Desktop on Apple Silicon in Practice

I bought M1 MacBook Air. It is the fastest computer I have, and I have been a GNOME/GNU/Linux user for long time. It is obvious conclusion that I need practical Linux desktop environment on Apple Silicon.

Fortunately, Linux already works on Apple Silicon/M1. But how practical is it?

• Two native ports exist.

tekin

# Stick this in your home directory and point your Global Git config at it by running:
#
#  $ git config --global core.attributesfile ~/.gitattributes
#
# See https://tekin.co.uk/2020/10/better-git-diff-output-for-ruby-python-elixir-and-more for more details

*.c     diff=cpp
*.h     diff=cpp
*.c++   diff=cpp
*.h++   diff=cpp

gabesoft

function gbr --description "Git browse commits"
    set -l log_line_to_hash "echo {} | grep -o '[a-f0-9]\{7\}' | head -1"
    set -l view_commit "$log_line_to_hash | xargs -I % sh -c 'git show --color=always % | diff-so-fancy | less -R'"
    set -l copy_commit_hash "$log_line_to_hash | xclip"
    set -l git_checkout "$log_line_to_hash | xargs -I % sh -c 'git checkout %'"
    set -l open_cmd "open"

    if test (uname) = Linux
        set open_cmd "xdg-open"
    end

kassane

Event Loop

In computer science, the event loop, message dispatcher, message loop, message pump, or run loop is a programming construct that waits for and dispatches events or messages in a program.

It works by making a request to some internal or external "event provider" (that generally blocks the request until an event has arrived), and then it calls the relevant event handler ("dispatches the event").

The event-loop may be used in conjunction with a reactor, if the event provider follows the file interface, which can be selected or 'polled' (the Unix system call, not actual polling).

The event loop almost always operates asynchronously with the message originator.

mtds

Virtual Networking on Linux

In the Linux Kernel, support for networking hardware and the methods to interact with these devices is standardized by the socket API:

                +----------------+
                |   Socket API   |
                +-------+--------+
                        |
User space              |

haydenbr

#!/usr/bin/env node

var fs = require('fs'),
    path = require('path'),
    cheerio = require('cheerio'),
    revHash = require('rev-hash');

var rootDir = path.resolve(__dirname, '../');
var wwwRootDir = path.resolve(rootDir, 'platforms', 'browser', 'www');
var buildDir = path.join(wwwRootDir, 'build');

chinmaygarde

#include <assert.h>
#include <chrono>
#include <embedder.h>
#include <glfw3.h>
#include <iostream>

static_assert(FLUTTER_ENGINE_VERSION == 1, "");

static const size_t kInitialWindowWidth = 800;