thesamesam

FAQ on the xz-utils backdoor (CVE-2024-3094)

This is a living document. Everything in this document is made in good faith of being accurate, but like I just said; we don't yet know everything about what's going on.

Background

On March 29th, 2024, a backdoor was discovered in xz-utils, a suite of software that

Kodehawa

This is the lowest I could get audio latency to work on my system (Ryzen 5 5700X, 32GB 3600MHz RAM, RX 6700). 
Scavenged as much of the man pages as possible to get a configuration close to what https://blog.thepoon.fr/osuLinuxAudioLatency/ gave.

This has given me no crackling nor lag, but it'll depend on your computer.

Use https://github.com/NelloKudo/osu-winello, export STAGING_AUDIO_DURATION=24000 and STAGING_AUDIO_PERIOD=12000 to start. 
Try lower, I've been able to do as low as STAGING_AUDIO_DURATION=3500 and STAGING_AUDIO_PERIOD=7000.

To adjust both STAGING_AUDIO_DURATION and STAGING_AUDIO_DURATION, make sure the PERIOD is a multiply of DURATION 
(3500 * 2 = 7000 duration, 4000 * 2 = 8000). This gives the highest chance of it to work.

maximtrp

Orange Pi PC + Arch Linux ARM: installation guide

This guide is based on multiple guides as well as official instructions for the other boards found on the Internet:

1. https://github.com/RoEdAl/alarm-uboot-sunxi-armv7
2. https://uthings.uniud.it/building-mainline-u-boot-and-linux-kernel-for-orange-pi-boards
3. https://archlinuxarm.org/platforms/armv7/allwinner/pcduino3

I have gone through all these steps recently and got a working board with my favorite Arch Linux ARM. I hope it will be helpful for someone else.

unixabg

#!/bin/bash


echo Adding microphone to Pulseaudio
grep -qxF 'load-module module-alsa-source device=hw:0,99' /etc/pulse/default.pa || echo 'load-module module-alsa-source device=hw:0,99' >> /etc/pulse/default.pa

echo Adding headphone to Pulseaudio
grep -qxF 'load-module module-alsa-sink device=hw:0,1' /etc/pulse/default.pa || echo 'load-module module-alsa-sink device=hw:0,1' >> /etc/pulse/default.pa

echo Adding headset microphone to Pulseaudio

drraccoony

SteamOS 3 on GPD Win 2 (Via Steamdeck recovery)

• SteamOS 3 on GPD Win 2 (Via Steamdeck recovery)
  • Setting Expectations
    • What works
    • What doesn't
  • Installation

• Step 1: Installing SteamOS3

xDShot

# /etc/udev/rules.d/90-dualsense-no-touchpad-input.rules
ACTION=="add|change", KERNEL=="event[0-9]*", ATTRS{name}=="*Wireless Controller Touchpad", ENV{LIBINPUT_IGNORE_DEVICE}="1"

peteristhegreat

Symptoms

Opening up No Man's Sky, SteamVR pops up an error that says wrong video card please plug your headset into the same graphics card as your primary monitor.

SteamVR stays stuck showing "up next" with the No Man's Sky logo in their waiting room, and No Man's Sky starts working on is own screen (with a view per eye) but never goes to the headset.

Note that this does not happen for any other VR app on my computer.

Answer on the internet

saivert

# ALSA monitor config file for PipeWire version "0.3.28" #

properties = {
    # Create a JACK device. This is not enabled by default because
    # it requires that the PipeWire JACK replacement libraries are
    # not used by the session manager, in order to be able to
    # connect to the real JACK server.
    #alsa.jack-device = false

    # Reserve devices.

cidkidnix

Pipewire is the replacement for JACK and PulseAudio, Pipewire allows low latency compared to any pulseaudio tweaks

Here is a short list of what you should do to get the lowest latency in Osu!

Higher audio rate equals less latency always, unless you increase your quantum
to calculate node latency for your audio device take the quantum size divided by your audio rate
so 64/96000 = 0.00066666666 * 1000 = 0.6ms this is 0.6ms node latency

To check client latency use pw-top, take the quantum size and the audio rate of the client then use quantum / audio rate * 1000
to get overall latency for the client

corycorvus

using UnityEngine;
using UnityEngine.XR;
using Valve.VR;

// simple library and examples for XR haptics
// note: controllers must be tracking to use haptics

// other examples: https://vrtoolkit.readme.io/docs/vrtk_interacthaptics

public static class HapticPulse