hyprland retains the display settings of the previous session, resulting in the main display not being recognized after switching configurations

[gitttyyy]

I'm writing some custom scripts to make my work more comfortable on different monitors, but I ran into this weird problem
I have defined configurations for three monitors and they look like this, I have defined configurations for three monitors and they are as follows

multi.conf

monitor=HDMI-A-1,highres,0x0,1
monitor=eDP-1,highres,2560x0,1

workspace = 1, monitor:HDMI-A-1, default:true
workspace = 2, monitor:HDMI-A-1, default:true
workspace = 3, monitor:HDMI-A-1, default:true
workspace = 4, monitor:HDMI-A-1, default:true
workspace = 5, monitor:HDMI-A-1, default:true
workspace = 6, monitor:HDMI-A-1, default:true
workspace = 7, monitor:HDMI-A-1, default:true
workspace = 8, monitor:HDMI-A-1, default:true
workspace = 9, monitor:HDMI-A-1, default:true
workspace = 10, monitor:HDMI-A-1, default:true

single_internal.conf

monitor=eDP-1,highres,auto,1
monitor=HDMI-A-1,disable

single_external.conf

monitor=HDMI-A-1,highres,0x0,1
# disable
monitor=eDP-1,disable

then I write a script to auto change them when lauch the hyprland session like exec-once=...

#!/usr/bin/env bash
MULTI=$HOME/.config/hypr/custom/monitors/multi.conf
SINGLE=$HOME/.config/hypr/custom/monitors/single_internal.conf
hyprctl monitors | rg '\b(HDMI|DP)' >/dev/null
if [[ $? -eq 0 ]]; then
	ln -sf "$MULTI" "$HOME/.config/hypr/custom/monitors.conf"
else
	ln -sf "$SINGLE" "$HOME/.config/hypr/custom/monitors.conf"
fi

hyprctl reload

then a script to select the layout manully

#!/usr/bin/env bash

# Define text and configuration files
files=(
    "$HOME/.config/hypr/custom/monitors/multi.conf"
    "$HOME/.config/hypr/custom/monitors/single_external.conf"
    "$HOME/.config/hypr/custom/monitors/single_internal.conf"
    "$HOME/.config/hypr/custom/monitors/mirror.conf"
)
texts=(
    "Extended Layout"
    "External Monitor"
    "Internal Monitor"
    "Mirror Layout"
)

# Initialize variables
selected_file="${files[0]}"
selected_text="${texts[0]}"
current_line=1
exit_loop=false

# Determine initial current_line value based on currently linked file
for i in "${!files[@]}"; do
    if [ -f "${files[$i]}" ] && [ "$(readlink -f "${files[$i]}")" = "$(readlink -f "$HOME/.config/hypr/custom/monitors.conf")" ]; then
        current_line=$((i + 1))
        selected_file="${files[$i]}"
        selected_text="${texts[$i]}"
        break
    fi
done

# If no matching linked file, default to the first file
if [ $current_line -eq 0 ]; then
    selected_file="${files[0]}"
    selected_text="${texts[0]}"
    current_line=1
fi

# Function: Show menu
function show_menu() {
    clear
    echo "Select Monitor Layout:"
    for i in "${!texts[@]}"; do
        if [ $((i + 1)) -eq $current_line ]; then
            echo -e "  > ${texts[$i]}"
        else
            echo -e "    ${texts[$i]}"
        fi
    done
}

# Function: Select option
function select_option() {
    local choice=$1
    case $choice in
    j | ''$'\e'[B)
        if [ $current_line -lt ${#texts[@]} ]; then
            ((current_line++))
        fi
        ;;
    k | ''$'\e'[A)
        if [ $current_line -gt 1 ]; then
            ((current_line--))
        fi
        ;;
    "")
        selected_file="${files[$((current_line - 1))]}"
        selected_text="${texts[$((current_line - 1))]}"
        exit_loop=true
        ;;
    esac
}

# Function: Read user input
function read_input() {
    read -s -n 1 key
    if [[ $key == "" ]]; then
        # Enter key
        select_option $key
        if [ "$selected_text" == "Mirror Layout" ]; then
            bash "$HOME/.config/hypr/scripts/swwwreload.sh"
        fi
        hyprctl reload
        clear
        # Show result
        if [ $? -eq 0 ]; then
            echo "Layout switched to: $selected_text"
        else
            echo "Layout switch failed!"
        fi
    elif [[ $key == $'\e' ]]; then
        # Arrow key sequence
        read -s -n 2 key
        select_option $key
    else
        select_option $key
    fi
}

# Main loop
while ! $exit_loop; do
    show_menu
    read_input
done

# Link configuration file
ln -sf "$selected_file" "$HOME/.config/hypr/custom/monitors.conf"

killall ags ydotool
nohup ags >/dev/null 2>&1 &
sleep 1

When I switch to External Monitor, exit the current hyprland session and re-enter the new session, although the script will be executed and the file is correctly linked to Mulit.conf or single_internal.conf, the main monitor cannot display it. Use Hyprctl reload doesn't work either. You can see the existence of eDP-1 using hyprctl monitors, like this

Monitor HDMI-A-1 (ID 0):
	[email protected] at 0x0
	description: Beihai Century Joint Innovation Technology Co.Ltd 27G1 0000000000000
	make: Beihai Century Joint Innovation Technology Co.,Ltd
	model: 27G1
	serial: 0000000000000
	active workspace: 1 (1)
	special workspace: 0 ()
	reserved: 0 48 0 0
	scale: 1.00
	transform: 0
	focused: yes
	dpmsStatus: 1
	vrr: 0
	activelyTearing: false
	currentFormat: XRGB8888
	availableModes: [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected] [email protected]

Monitor eDP-1 (ID 1):
	[email protected] at 2560x0
	description: BOE 0x0A40
	make: BOE
	model: 0x0A40
	serial: 
	active workspace: 11 (11)
	special workspace: 0 ()
	reserved: 0 0 0 0
	scale: 1.00
	transform: 0
	focused: no
	dpmsStatus: 1
	vrr: 0
	activelyTearing: false
	currentFormat: Invalid
	availableModes: [email protected] [email protected]

then I see this at wlr layout ui

When click the eDP-1,the app will exit and the error is here

Unable to parse: 0x0 px
Traceback (most recent call last):
  File "/usr/bin/wlrlui", line 8, in <module>
    sys.exit(main())
             ^^^^^^
  File "/usr/lib/python3.11/site-packages/wlr_layout_ui/__init__.py", line 85, in main
    pyglet.app.run()
  File "/usr/lib/python3.11/site-packages/pyglet/app/__init__.py", line 76, in run
    event_loop.run(interval)
  File "/usr/lib/python3.11/site-packages/pyglet/app/base.py", line 164, in run
    platform_event_loop.step(timeout)
  File "/usr/lib/python3.11/site-packages/pyglet/app/xlib.py", line 85, in step
    device.select()
  File "/usr/lib/python3.11/site-packages/pyglet/canvas/xlib.py", line 167, in select
    dispatch(e)
  File "/usr/lib/python3.11/site-packages/pyglet/window/xlib/__init__.py", line 1019, in dispatch_platform_event_view
    event_handler(e)
  File "/usr/lib/python3.11/site-packages/pyglet/window/xlib/__init__.py", line 1516, in _event_button
    self.dispatch_event('on_mouse_press', x, y, 1 << button, modifiers)
  File "/usr/lib/python3.11/site-packages/pyglet/window/__init__.py", line 671, in dispatch_event
    super().dispatch_event(*args)
  File "/usr/lib/python3.11/site-packages/pyglet/event.py", line 392, in dispatch_event
    raise e
  File "/usr/lib/python3.11/site-packages/pyglet/event.py", line 387, in dispatch_event
    if getattr(self, event_type)(*args):
       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.11/site-packages/wlr_layout_ui/gui.py", line 322, in on_mouse_press
    self.action_select_screen(screen)
  File "/usr/lib/python3.11/site-packages/wlr_layout_ui/gui.py", line 547, in action_select_screen
    if r[0] == cur_mode.width and r[1] == cur_mode.height:
               ^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'width'

I thought it was the order in which I executed the scripts. I tried putting source=~/.config/hypr/custom/monitors.conf
Add it after the script is executed, but it still doesn’t work

Only after the script is executed, the file is linked, the current session is launched again, and then hyprland is re-entered, the eDP-1 monitor will be correctly recognized.

Anyone know why this strange behavior happen?

[Vigilans]

    if r[0] == cur_mode.width and r[1] == cur_mode.height:
               ^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'width'

When eDP monitor is not enabled, hyprctl -j monitors all (in wlr layout ui source code) do not return width and height information in cur_mode. I am getting a similar error like this:

Traceback (most recent call last):
  File "/home/vigilans/Library/dotfiles-khaneliman/wlr-layout-ui/venv/bin/wlrlui", line 6, in <module>
    sys.exit(main())
             ^^^^^^
  File "/home/vigilans/Library/dotfiles-khaneliman/wlr-layout-ui/src/wlr_layout_ui/__init__.py", line 56, in main
    load()
  File "/home/vigilans/Library/dotfiles-khaneliman/wlr-layout-ui/src/wlr_layout_ui/screens.py", line 95, in load
    load_from_hyprctl()
  File "/home/vigilans/Library/dotfiles-khaneliman/wlr-layout-ui/src/wlr_layout_ui/screens.py", line 63, in load_from_hyprctl
    idx = modes_str.index(cur_mode)
          ^^^^^^^^^^^^^^^^^^^^^^^^^
ValueError: '[email protected]' is not in list

Because in source code

        cur_mode = "%dx%d@%.2fHz" % (
            monitor["width"],
            monitor["height"],
            monitor["refreshRate"],
        )

monitor["width"] and monitor["height"] are all 0.