feat: switch host from intel VirtualHeads to dummy driver for headless boot
- Add 20-dummy-headless.conf (Driver dummy, 1920x1080) - Remove 20-intel-virtual.conf (intel driver required HDMI at boot) - Update install.sh: installs dummy driver, saves EDID, updates GRUB - Update README: document dummy driver + kernel EDID fallback approach - hdmi-fallback.sh now detects DUMMY0 or VIRTUAL1 Rationale: intel VirtualHeads only worked when HDMI was connected at boot. Dummy driver creates DUMMY0 unconditionally, working with or without cable. Kernel EDID fallback (video=... drm.edid_firmware=...) is insurance if dummy fails.
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219
install.sh
219
install.sh
@@ -1,5 +1,5 @@
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#!/bin/bash
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# RDtop Installer — RustDesk headless display setup
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# RDtop Installer — RustDesk headless display setup (dummy driver)
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# Usage: bash -c "$(curl -fsSL https://git.softuniq.eu/NW/RDtop/raw/branch/main/install.sh)"
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set -euo pipefail
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@@ -8,9 +8,10 @@ echo "Installing RustDesk headless display fallback..."
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# Config paths
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REPO_URL="https://git.softuniq.eu/NW/RDtop"
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X11_CONF="/etc/X11/xorg.conf.d/90-fallback.conf"
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X11_CONF="/etc/X11/xorg.conf.d/20-dummy-headless.conf"
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BIN_DST="$HOME/.local/bin/hdmi-fallback.sh"
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SYSTEMD_DST="$HOME/.config/systemd/user/hdmi-fallback.service"
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EDID_DST="/lib/firmware/edid/samsung.bin"
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LOG="$HOME/.local/logs/rdtop-install.log"
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mkdir -p "$(dirname "$LOG")"
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@@ -24,130 +25,203 @@ if [ "$EUID" -eq 0 ]; then
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exit 1
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fi
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if ! xset q >/dev/null 2>&1; then
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log "WARNING: No X11 display found. You need to run this from a graphical session."
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# --- Check sudo works ---
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if ! sudo -n true 2>/dev/null; then
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echo "This script requires sudo privileges. Please enter your password when prompted."
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fi
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# --- Check if dummy driver exists or can be installed ---
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# --- Install dummy driver ---
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if [ -f /usr/lib/xorg/modules/drivers/dummy_drv.so ]; then
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log "Dummy driver already present"
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else
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log "Dummy driver not found. Will try to install xserver-xorg-video-dummy..."
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log "Installing xserver-xorg-video-dummy..."
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if command -v apt-get >/dev/null 2>&1; then
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sudo apt-get update -qq && sudo apt-get install -y -qq xserver-xorg-video-dummy || log "WARNING: apt failed, dummy not installed (VIRTUAL1 should still work)"
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sudo apt-get update -qq && sudo apt-get install -y -qq xserver-xorg-video-dummy || true
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else
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log "WARNING: apt-get not found, skipping dummy driver install"
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log "WARNING: apt-get not found, cannot install dummy driver"
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exit 1
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fi
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fi
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# --- Create X11 fallback config ---
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log "Creating X11 fallback config at $X11_CONF"
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echo "retrowest" | sudo -S bash -c 'cat > /etc/X11/xorg.conf.d/90-fallback.conf' <<'EOF'
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# Fallback Xorg config: guarantee a framebuffer even without HDMI
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# --- Remove old conflicting configs ---
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log "Removing old Intel X11 configs"
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sudo rm -f /etc/X11/xorg.conf.d/20-intel-virtual.conf
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sudo rm -f /etc/X11/xorg.conf.d/90-fallback.conf
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# --- Copy EDID firmware ---
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log "Saving EDID firmware"
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if [ -f /sys/class/drm/card0-HDMI-A-1/edid ]; then
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sudo mkdir -p /lib/firmware/edid
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sudo cp /sys/class/drm/card0-HDMI-A-1/edid "$EDID_DST"
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sudo chmod 644 "$EDID_DST"
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log "EDID saved to $EDID_DST"
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else
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log "WARNING: No EDID found at /sys/class/drm/card0-HDMI-A-1/edid"
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fi
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# --- Create dummy headless X11 config ---
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log "Creating dummy headless X11 config at $X11_CONF"
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cat <<'XORG' | sudo tee "$X11_CONF" >/dev/null
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Section "Device"
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Identifier "AutoDevice"
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Driver "modesetting"
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Identifier "DummyHeadless"
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Driver "dummy"
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Option "ConstantDPI" "true"
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VideoRam 256000
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EndSection
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Section "Monitor"
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Identifier "AutoMonitor"
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Option "DPMS" "false"
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Identifier "DummyMonitor"
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HorizSync 28-80
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VertRefresh 48-75
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EndSection
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Section "Screen"
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Identifier "AutoScreen"
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Device "AutoDevice"
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Monitor "AutoMonitor"
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Identifier "DummyScreen"
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Device "DummyHeadless"
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Monitor "DummyMonitor"
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DefaultDepth 24
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SubSection "Display"
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Depth 24
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Virtual 1920 1080
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Modes "1920x1080"
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Modes "1920x1080" "1280x720"
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EndSubSection
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EndSection
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EOF
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sudo chmod 644 /etc/X11/xorg.conf.d/90-fallback.conf
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XORG
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sudo chmod 644 "$X11_CONF"
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log "X11 config installed"
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# --- Update GRUB for kernel EDID fallback ---
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log "Updating GRUB cmdline for EDID fallback"
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if [ -f /etc/default/grub ]; then
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sudo sed -i 's|GRUB_CMDLINE_LINUX_DEFAULT=".*"|GRUB_CMDLINE_LINUX_DEFAULT="quiet splash video=HDMI-A-1:1920x1080@60 drm.edid_firmware=HDMI-A-1:edid/samsung.bin"|' /etc/default/grub
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sudo update-grub >/dev/null 2>&1 || log "WARNING: update-grub failed"
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log "GRUB updated"
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else
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log "WARNING: /etc/default/grub not found"
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fi
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# --- Install fallback script ---
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log "Installing hdmi-fallback.sh to ~/.local/bin/"
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mkdir -p "$HOME/.local/bin"
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cat > "$BIN_DST" <<'SCRIPT'
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#!/bin/bash
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# Universal HDMI Fallback: DUMMY0 (dummy driver) or VIRTUAL1 (intel)
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# Works both with HDMI connected and disconnected at boot
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LOG="$HOME/.local/logs/drm-hotplug.log"
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mkdir -p "$(dirname "$LOG")"
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mkdir -p "$HOME/.local/logs"
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export DISPLAY=:0
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log() {
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echo "$(date '+%Y-%m-%d %H:%M:%S') $1" | tee -a "$LOG" >&1
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echo "$(date '+%Y-%m-%d %H:%M:%S') $1" | tee -a "$LOG" >/dev/null
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}
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log "=== Starting VIRTUAL1-primary fallback monitor ==="
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MODE="1920x1080_60.00"
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if ! xrandr 2>/dev/null | grep -q "$MODE"; then
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xrandr --newmode "$MODE" 173.00 1920 2048 2248 2576 1080 1083 1088 1120 2>/dev/null || true
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fi
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xrandr --addmode VIRTUAL1 "$MODE" 2>/dev/null || true
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setup_virtual_primary() {
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log "Setting up VIRTUAL1 as primary..."
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xrandr --output VIRTUAL1 --mode "$MODE" --primary 2>&1 && log "VIRTUAL1 primary OK" || log "VIRTUAL1 primary failed"
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# Find available primary output (DUMMY0 or VIRTUAL1)
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find_primary_output() {
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if xrandr 2>/dev/null | grep -q "^DUMMY0"; then
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echo "DUMMY0"
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elif xrandr 2>/dev/null | grep -q "^VIRTUAL1"; then
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echo "VIRTUAL1"
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else
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echo ""
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fi
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}
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enable_hdmi_clone() {
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log "Enabling HDMI1 as clone of VIRTUAL1"
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xrandr --output HDMI1 --auto --same-as VIRTUAL1 2>&1 && log "HDMI1 cloned OK" || log "HDMI1 clone failed"
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# Find HDMI output name (HDMI-1, HDMI1, etc)
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find_hdmi_output() {
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xrandr 2>/dev/null | grep -E "^HDMI-[0-9] connected" | awk '{print $1}' | head -1
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}
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disable_hdmi() {
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log "HDMI1 disconnected, keeping VIRTUAL1 primary"
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xrandr --output HDMI1 --off 2>&1 && log "HDMI1 off OK" || true
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# Set up mode for virtual output
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setup_mode() {
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local OUTPUT="$1"
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local MODE_NAME="1920x1080"
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if [ "$OUTPUT" = "VIRTUAL1" ]; then
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local MODELINE="1920x1080_60.00"
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if ! xrandr 2>/dev/null | grep -q "$MODELINE"; then
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xrandr --newmode "$MODELINE" 173.00 1920 2048 2248 2576 1080 1083 1088 1120 2>/dev/null || true
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fi
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xrandr --addmode VIRTUAL1 "$MODELINE" 2>/dev/null || true
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MODE_NAME="$MODELINE"
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fi
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echo "$MODE_NAME"
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}
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log "Start monitor (user=$USER, display=$DISPLAY)"
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CONNECTOR=""
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for p in /sys/class/drm/card1-HDMI-A-1 /sys/class/drm/card0-HDMI-A-1; do
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[ -e "$p/status" ] && { CONNECTOR="$p"; break; }
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done
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[ -z "$CONNECTOR" ] && CONNECTOR=$(find /sys/class/drm -maxdepth 1 -name "*HDMI-A-1" -type d | head -1)
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if [ -z "$CONNECTOR" ] || [ ! -e "$CONNECTOR/status" ]; then
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log "ERROR: No HDMI-A-1 found"
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setup_virtual_primary
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log "WARNING: No HDMI-A-1 connector found, running headless only"
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fi
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# Initial state
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LAST_STATE=$(cat "$CONNECTOR/status" 2>/dev/null || echo unknown)
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log "Initial HDMI: $LAST_STATE"
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# Detect outputs
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PRIMARY=$(find_primary_output)
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HDMI=$(find_hdmi_output)
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if [ -z "$PRIMARY" ]; then
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log "ERROR: No virtual output found (DUMMY0 or VIRTUAL1)"
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exit 1
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fi
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log "Monitoring: $CONNECTOR"
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log "Primary: $PRIMARY, HDMI: ${HDMI:-none}"
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setup_virtual_primary
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HDMI_STATE=$(cat "$CONNECTOR/status" 2>/dev/null || echo "unknown")
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log "Initial HDMI state: $HDMI_STATE"
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MODE=$(setup_mode "$PRIMARY")
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if [ "$HDMI_STATE" = "connected" ]; then
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enable_hdmi_clone
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# Initial setup
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if [ "$LAST_STATE" = "connected" ] && [ -n "$HDMI" ]; then
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log "HDMI connected, setting clone: $PRIMARY primary + $HDMI same-as"
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xrandr --output "$PRIMARY" --mode "$MODE" --primary 2>/dev/null || true
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xrandr --output "$HDMI" --auto --same-as "$PRIMARY" 2>/dev/null || true
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else
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disable_hdmi
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log "HDMI disconnected or not found, keeping $PRIMARY primary"
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xrandr --output "$PRIMARY" --mode "$MODE" --primary 2>/dev/null || true
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[ -n "$HDMI" ] && xrandr --output "$HDMI" --off 2>/dev/null || true
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fi
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log "Initial setup complete. Monitors:"
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xrandr --listmonitors 2>&1 | while read line; do log " $line"; done
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LAST_STATE="$HDMI_STATE"
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log "Setup complete. Monitors:"
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xrandr --listmonitors 2>/dev/null | while read -r line; do log " $line"; done
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# Main loop
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while true; do
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CURRENT=$(cat "$CONNECTOR/status" 2>/dev/null || echo "unknown")
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CURRENT=$(cat "$CONNECTOR/status" 2>/dev/null || echo unknown)
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if [ "$CURRENT" != "$LAST_STATE" ]; then
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log "HDMI changed: $LAST_STATE -> $CURRENT"
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setup_virtual_primary
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if [ "$CURRENT" = "connected" ]; then
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enable_hdmi_clone
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else
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disable_hdmi
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# Re-detect
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PRIMARY=$(find_primary_output)
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HDMI=$(find_hdmi_output)
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MODE=$(setup_mode "$PRIMARY")
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if [ -z "$PRIMARY" ]; then
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log "ERROR: No virtual output detected after HDMI change"
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sleep 5
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continue
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fi
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log "Monitor layout after change:"
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xrandr --listmonitors 2>&1 | while read line; do log " $line"; done
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# Always make PRIMARY primary
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xrandr --output "$PRIMARY" --mode "$MODE" --primary 2>/dev/null || true
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if [ "$CURRENT" = "connected" ] && [ -n "$HDMI" ]; then
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log "HDMI connected, cloning $HDMI to $PRIMARY"
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xrandr --output "$HDMI" --auto --same-as "$PRIMARY" 2>/dev/null || true
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else
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log "HDMI disconnected, keeping $PRIMARY primary"
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[ -n "$HDMI" ] && xrandr --output "$HDMI" --off 2>/dev/null || true
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fi
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LAST_STATE="$CURRENT"
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fi
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sleep 2
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done
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SCRIPT
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@@ -160,7 +234,7 @@ log "Installing systemd user unit"
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mkdir -p "$HOME/.config/systemd/user"
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cat > "$SYSTEMD_DST" <<'UNIT'
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[Unit]
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Description=HDMI to VIRTUAL1 Fallback Monitor
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Description=HDMI to Virtual Fallback Monitor
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After=graphical-session.target
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[Service]
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@@ -175,8 +249,8 @@ WantedBy=graphical-session.target
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UNIT
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systemctl --user daemon-reload
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systemctl --user enable --now hdmi-fallback.service
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log "Systemd unit enabled and started"
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systemctl --user enable --now hdmi-fallback.service 2>/dev/null || true
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log "Systemd unit enabled"
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# --- Summary ---
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echo ""
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@@ -185,15 +259,16 @@ echo "RDtop installation complete!"
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echo "============================================"
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echo ""
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echo "Next steps:"
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echo "1. Reboot or re-login to apply X11 config"
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echo " sudo systemctl restart gdm"
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echo "1. REBOOT now for changes to take effect:"
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echo " sudo reboot"
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echo ""
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echo "2. After reboot, verify VIRTUAL1 is primary:"
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echo "2. After reboot without HDMI, check:"
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echo " xrandr --listmonitors"
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echo ""
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echo "3. Check service status:"
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echo "3. Service status:"
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echo " systemctl --user status hdmi-fallback.service"
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echo ""
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echo "4. To verify: unplug HDMI cable, VIRTUAL1 will stay active"
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echo "4. View logs:"
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echo " cat ~/.local/logs/drm-hotplug.log"
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echo ""
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log "Install complete"
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