fewtarius

AMD APU Optimization Guide for llama.cpp on SteamOS

This guide documents the process to optimize and run large language models on AMD APUs (specifically 7840U with Radeon 780M, Ayaneo Flip w/ 32GB RAM) using llama.cpp with Vulkan acceleration.

Prerequisites

System Preparation

# Disable read-only filesystem (SteamOS specific)
sudo steamos-readonly disable

4w idle savings:

mkdir -p ${HOME}/.config/gamescope/scripts/displays/
cat <<EOF >${HOME}/.config/gamescope/scripts/displays/AYA-AYANEOFHD.lua
gamescope.config.known_displays.ayaneo_fhd_lcd.dynamic_refresh_rates = {60}
EOF

To revert, remove the configuration and reboot the device.

Add space to a MacOS Native image running in UTM

Install qemu to provide qemu-img

brew install qemu

Resize the raw image

# Stop the VM (no state so it is editable) and change into the Data directory

Save to ~/install_vita3k.sh, make it executable, and execute it in Desktop Mode. Add the Vita3K shortcut to Steam.

#!/bin/sh

EMU="Vita3K"
DESKTOP_FILE="${EMU}.desktop"

APPS_PATH="${HOME}/Applications"
INSTALL_PATH="${HOME}/.config/${EMU}"

CD into the systemd user directory and create the service.

https://docs.syncthing.net/users/autostart.html

cd ~/.config/systemd/user
vim syncthing@deck.service

systemd@deck.service content

Fixing Jack Sense and EAPD

This mini-guide helps correct issues with internal speakers or the headphone jack outputting static and not functioning after sleep. It deprecates CodecCommander, ALC_JackFix, my JackFix script, and all other combo jack helpers by correcting the layout in AppleALC.

Prerequisites

Xcode
The latest AppleALC source code tested to build cleanly
A Codec Dump from Linux or OpenCore
ProperTree

	#!/bin/bash
	# Restore script for Heroic game saves (SteamOS/SteamFork)
	# Restores a selected game's save from backup to its original location
	# Usage: ./restore_heroic_save.sh <GameName> <BackupFile>

	SRC_DIR="/var/run/media/primary/Backups"
	DEST_DIR="$HOME/Games/Heroic/Prefixes/default"

	if [ "$#" -ne 2 ]; then
	echo "Usage: $ <GameName> <BackupFile>"

	#!/bin/bash
	# Backup script for Heroic game saves (SteamOS/SteamFork)
	# Each game's save is backed up individually with a time/date stamp
	# Destination: /var/run/media/primary/Backups/

	SRC_DIR="$HOME/Games/Heroic/Prefixes/default"
	DEST_DIR="/var/run/media/primary/Backups"
	DATE=$(date +'%Y%m%d_%H%M%S')

	# Create destination if it doesn't exist

	/dts-v1/;

	/ {
	#address-cells = <0x01>;
	#size-cells = <0x01>;
	compatible = "actions,gs705a\0actions,atm7059a";
	interrupt-parent = <0x01>;
	model = "Actions GS705A board";

	chosen {