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Stabilizing 5 GHz Wi-Fi on OnePlus 5 -- postmarketOS edge

Device: OnePlus 5 (oneplus-cheeseburger, msm8998)
Wi-Fi chip: WCN3990 (ath10k_snoc)
Kernel: linux-postmarketos-qcom-msm8998 (Linux 6.0.x)
OS: postmarketOS edge (Alpine edge + systemd)

All commands in this guide run directly on the device as root (via doas sh or doas -s). The device is assumed to have a working internet connection (e.g. via 2.4 GHz Wi-Fi or USB tethering).

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Arch + xRDP + RFX — working stack (no memory leak, correct colors)

Disclaimer

This gist was drafted with help from an AI assistant based on a live debugging session. Verify details before applying to your system.

TL;DR

Use xorgxrdp (non-glamor) with RFX codec. The glamor build (xorgxrdp-glamor) has a GEM shmem leak that causes OOM regardless of GPU or kernel version. Software rendering avoids the leak entirely with no visible performance penalty.

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#!/usr/bin/env bash
set -Eeuo pipefail

# Colors for output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
NC='\033[0m' # No Color

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#!/usr/bin/env bash
# export-copilot-chat.sh
# Interactive script to list and export VSCode Copilot chat sessions to Markdown

# --- Detect default baseDir depending on OS ---
detect_default_basedir() {
  case "$(uname -s)" in
  Linux)
    echo "$HOME/.config/Code/User/workspaceStorage"
    ;;

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Ubuntu Mate 20.04 XRDP setup

Documenting XRDP setup which worked for me on Ubuntu Mate 20.04.

Some parts are taken from: http://c-nergy.be/blog/?p=14093.

Install xrdp

sudo apt install xrdp

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<?xml version="1.0"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<fontconfig>
  <alias>
    <family>monospace</family>
    <prefer><family>Symbols Nerd Font</family></prefer>
  </alias>
  <alias>
    <family>Heavy Data</family>
    <prefer><family>Symbols Nerd Font</family></prefer>

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Vim Motions & Operators Cheat-Sheet

1. Basic Cursor Movement

Action	Command
Left	h
Down	j
Up	k
Right	l
Start of line	0

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{
    "window.commandCenter": 1,
    "makefile.configureOnOpen": false,
    "git.confirmSync": false,
    "window.zoomLevel": 0,
    "workbench.editor.enablePreview": false,
    "files.exclude": {
        "**/.git": true,
        "**/.DS_Store": true,
        "**/.history": true,

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tee /tmp/grd.te << EOF > /dev/null
module grd 1.0;
require {
    type system_dbusd_t;
    type unconfined_service_t;
    type xdm_t;
    class tcp_socket { getattr getopt read setopt shutdown write };
}
allow system_dbusd_t unconfined_service_t:tcp_socket { read write };
allow xdm_t unconfined_service_t:tcp_socket { getattr getopt read setopt shutdown write };

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After searching around, I found the following bug, which explains the cause of the problem and documents a workaround:
https://bugzilla.rpmfusion.org/show_bug.cgi?id=7090

Following the advice in that bug report, I successfully worked around the problem as follows:

$ sudo systemctl edit systemd-homed
Then add these lines to the config file:

[Service] 
Environment="SYSTEMD_HOME_LOCK_FREEZE_SESSION=false"