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Manual Implementation of Auto Resizing For Non-Gnome Environments (like XFCE) running under Spice/Libvirt
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#!/bin/bash | |
# SPDX-License-Identifier: MIT License | |
# Steps: | |
# 1) Make sure bash is available | |
# 2) Create udev rule | |
# - path to new udev rule: /etc/udev/rules.d/50-x-resize.rules | |
# - udev rule content: | |
# ACTION=="change",KERNEL=="card0", SUBSYSTEM=="drm", RUN+="/usr/local/bin/x-resize" | |
# 3) Create /var/log/autores directory | |
# 4) Create script /usr/local/bin/x-resize (this file) and make executable | |
# 5) Reload udev rules with `sudo udevadm control --reload-rules` | |
# 6) Make sure auto-resize is enabled in virt-viewer/spicy | |
# 7) Make sure qemu-guest-agent spice-vdagent xserver-xspice xserver-xorg-video-qxl are installed | |
# 8) Make sure spice-vdagentd is loaded and running fine | |
# Debugging: | |
# - Watch udev events on resize with `udevadm monitor` | |
# - Watch dmesg (may not be super useful) with `dmesg -w` | |
# - Watch autores logs with `tail -f /var/log/autores/autores.log` | |
# Credits: | |
# - Credit for Finding Sessions as Root: https://unix.stackexchange.com/questions/117083/how-to-get-the-list-of-all-active-x-sessions-and-owners-of-them | |
# - Credit for Resizing via udev: https://superuser.com/questions/1183834/no-auto-resize-with-spice-and-virt-manager | |
## Ensure Log Directory Exists | |
LOG_DIR=${AUTORES_LOG_DIR:-/var/log/autores}; | |
if [ ! -d $LOG_DIR ]; then | |
mkdir $LOG_DIR; # this may fail due to perm issues, just create it before hand to be safe with correct perms | |
fi | |
LOG_FILE=${LOG_DIR}/autores.log | |
## Function to find User Sessions & Resize their display | |
function x_resize() { | |
declare -A disps usrs | |
usrs=() | |
disps=() | |
for i in $(users);do | |
[[ $i = root ]] && continue # skip root | |
usrs[$i]=1 | |
done | |
for u in "${!usrs[@]}"; do | |
for i in $(sudo ps e -u "$u" | sed -rn 's/.* DISPLAY=(:[0-9]*).*/\1/p');do | |
disps[$i]=$u | |
done | |
done | |
for d in "${!disps[@]}";do | |
session_user="${disps[$d]}" | |
session_display="$d" | |
session_output=$(sudo -u "$session_user" PATH=/usr/bin DISPLAY="$session_display" xrandr | awk '/ connected/{print $1; exit; }') | |
echo "Session User: $session_user" | tee -a $LOG_FILE; | |
echo "Session Display: $session_display" | tee -a $LOG_FILE; | |
echo "Session Output: $session_output" | tee -a $LOG_FILE; | |
sudo -u "$session_user" PATH=/usr/bin DISPLAY="$session_display" xrandr --output "$session_output" --auto | tee -a $LOG_FILE; | |
done | |
} | |
echo "Resize Event: $(date)" | tee -a $LOG_FILE | |
x_resize |
It also works on xfce.
It works perfectly under LigthDM + MATE
It works on XFCE @ Kali Linux
It works thank you, though sudo didnt work for me, so i used su instead. https://gist.github.com/manuuurino/ad96dfbdc5654c7095d28252901763b2
@3lpsy Hi! For packaging in free software distributions, would you be so kind as to add a free software license SPDX header line to this file? Something like: # SPDX-License-Identifier: GPL-3.0-or-later
would do. Thank you!
For those who'd like to distribute such a solution, I've come up with an alternative (Guile written) script licensed under the GPLv3 or later: https://gitlab.com/Apteryks/x-resize
It's successfully being used in the Guix demo VM to have dynamic resizing with SPICE using the Xfce desktop.
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I've only tested it on mate so far but I imagine it'll also work for xfce.