xdph crashes (SEGV) and causes a restart loop on normal Hyprland exit

[lingyaochu]

problem description

When Hyprland is exited normally (e.g., via the SUPER+M keybinding or the hyprctl dispatch exit command), the xdg-desktop-portal-hyprland (xdph) service crashes with a Segmentation Fault (SEGV).

Due to its systemd service file being configured with Restart=on-failure, systemd attempts to restart the service. However, since the Wayland compositor (Hyprland) is no longer running at this point, the restarted xdph instances fail to connect to the Wayland compositor (logging "couldn't connect to a wayland compositor") and consequently fail again (or crash).

This results in a restart loop until systemd gives up due to "Start request repeated too quickly," leaving the xdg-desktop-portal-hyprland service in a failed state. This also impacts subsequent Hyprland sessions as the portal service becomes unavailable.

The core issue appears to be xdg-desktop-portal-hyprland not gracefully handling the shutdown of its dependent Wayland compositor, leading to the initial crash.

step to reproduce

• Reboot the system and start Hyprland from a TTY (using Hyprland command).
• Ensure the xdg-desktop-portal-hyprland service is active (e.g., by checking systemctl --user status xdg-desktop-portal-hyprland.service).
• Exit Hyprland normally (e.g., using the default SUPER+M keybinding or by executing hyprctl dispatch exit).
• Observe the systemd user journal (journalctl --user -xe | grep hyprland).

expected behavior

• xdg-desktop-portal-hyprland crashes with an SEGV immediately after or during Hyprland's exit process.
• Systemd attempts to restart the xdph service.
• The restarted xdph instances log errors like "couldn't connect to a wayland compositor" and then fail.
• This loop continues until systemd logs "Start request repeated too quickly" and stops trying to restart the service, leaving it in a failed state.

enviroment

• OS: Arch Linux
• Hyprland Version: 0.49.0
• xdg-desktop-portal-hyprland Version: 1.3.9-9
• GPU & Driver: NVIDIA GeForce RTX 2060, nvidia-open driver with version 570.144-5
• Launch Method: From TTY using Hyprland command

relevant logs (after exiting Hyprland normally, produced by journalctl --user)

May 17 23:18:29 personal xdg-desktop-por[867]: Error reading events from display: Broken pipe
May 17 23:18:29 personal systemd[760]: xdg-desktop-portal-gtk.service: Main process exited, code=exited, status=1/FAILURE
May 17 23:18:29 personal systemd[760]: xdg-desktop-portal-gtk.service: Failed with result 'exit-code'.
May 17 23:18:30 personal systemd-coredump[999]: [🡕] Process 888 (xdg-desktop-por) of user 1000 dumped core.

                                                Stack trace of thread 888:
                                                #0  0x0000796f40ffc8ac n/a (libwayland-client.so.0 + 0x58ac)
                                                #1  0x0000796f40ffca21 n/a (libwayland-client.so.0 + 0x5a21)
                                                #2  0x0000796f40ffe7d7 wl_proxy_marshal_array_flags (libwayland-client.so.0 + 0x77d7)
                                                #3  0x0000796f40fff3cb wl_proxy_marshal_flags (libwayland-client.so.0 + 0x83cb)
                                                #4  0x000057f10152db78 n/a (/usr/lib/xdg-desktop-portal-hyprland + 0x25b78)
                                                #5  0x000057f10153a841 n/a (/usr/lib/xdg-desktop-portal-hyprland + 0x32841)
                                                #6  0x000057f10153acbd n/a (/usr/lib/xdg-desktop-portal-hyprland + 0x32cbd)
                                                #7  0x0000796f4092b5e1 n/a (libc.so.6 + 0x405e1)
                                                #8  0x0000796f4092b6be exit (libc.so.6 + 0x406be)
                                                #9  0x0000796f409126bc n/a (libc.so.6 + 0x276bc)
                                                #10 0x0000796f40912769 __libc_start_main (libc.so.6 + 0x27769)
                                                #11 0x000057f10151fb05 n/a (/usr/lib/xdg-desktop-portal-hyprland + 0x17b05)
                                                ELF object binary architecture: AMD x86-64
May 17 23:18:30 personal systemd[760]: xdg-desktop-portal-hyprland.service: Main process exited, code=dumped, status=11/SEGV
May 17 23:18:30 personal systemd[760]: xdg-desktop-portal-hyprland.service: Failed with result 'core-dump'.
May 17 23:18:30 personal systemd[760]: xdg-desktop-portal-hyprland.service: Scheduled restart job, restart counter is at 1.
May 17 23:18:30 personal systemd[760]: Starting Portal service (Hyprland implementation)...
May 17 23:18:30 personal xdg-desktop-portal-hyprland[1019]: [LOG] Initializing xdph...
May 17 23:18:30 personal xdg-desktop-portal-hyprland[1019]: [CRITICAL] Couldn't connect to a wayland compositor
May 17 23:18:30 personal systemd[760]: Started Portal service (Hyprland implementation).
May 17 23:18:30 personal systemd[760]: xdg-desktop-portal-hyprland.service: Main process exited, code=exited, status=1/FAILURE
May 17 23:18:30 personal systemd[760]: xdg-desktop-portal-hyprland.service: Failed with result 'exit-code'.
May 17 23:18:30 personal systemd[760]: xdg-desktop-portal-hyprland.service: Scheduled restart job, restart counter is at 2.
May 17 23:18:30 personal systemd[760]: Starting Portal service (Hyprland implementation)...
May 17 23:18:30 personal xdg-desktop-portal-hyprland[1021]: [LOG] Initializing xdph...
May 17 23:18:30 personal xdg-desktop-portal-hyprland[1021]: [CRITICAL] Couldn't connect to a wayland compositor
May 17 23:18:30 personal systemd[760]: Started Portal service (Hyprland implementation).
May 17 23:18:30 personal systemd[760]: xdg-desktop-portal-hyprland.service: Main process exited, code=exited, status=1/FAILURE
May 17 23:18:30 personal systemd[760]: xdg-desktop-portal-hyprland.service: Failed with result 'exit-code'.
May 17 23:18:30 personal systemd[760]: xdg-desktop-portal-hyprland.service: Scheduled restart job, restart counter is at 3.
May 17 23:18:30 personal systemd[760]: Starting Portal service (Hyprland implementation)...
May 17 23:18:30 personal xdg-desktop-portal-hyprland[1023]: [LOG] Initializing xdph...
May 17 23:18:30 personal xdg-desktop-portal-hyprland[1023]: [CRITICAL] Couldn't connect to a wayland compositor
May 17 23:18:30 personal systemd[760]: Started Portal service (Hyprland implementation).
May 17 23:18:30 personal systemd[760]: xdg-desktop-portal-hyprland.service: Main process exited, code=exited, status=1/FAILURE
May 17 23:18:30 personal systemd[760]: xdg-desktop-portal-hyprland.service: Failed with result 'exit-code'.
May 17 23:18:31 personal systemd[760]: xdg-desktop-portal-hyprland.service: Scheduled restart job, restart counter is at 4.
May 17 23:18:31 personal systemd[760]: Starting Portal service (Hyprland implementation)...
May 17 23:18:31 personal xdg-desktop-portal-hyprland[1025]: [LOG] Initializing xdph...
May 17 23:18:31 personal xdg-desktop-portal-hyprland[1025]: [CRITICAL] Couldn't connect to a wayland compositor
May 17 23:18:31 personal systemd[760]: Started Portal service (Hyprland implementation).
May 17 23:18:31 personal systemd[760]: xdg-desktop-portal-hyprland.service: Main process exited, code=exited, status=1/FAILURE
May 17 23:18:31 personal systemd[760]: xdg-desktop-portal-hyprland.service: Failed with result 'exit-code'.
May 17 23:18:31 personal systemd[760]: xdg-desktop-portal-hyprland.service: Scheduled restart job, restart counter is at 5.
May 17 23:18:31 personal systemd[760]: Starting Portal service (Hyprland implementation)...
May 17 23:18:31 personal xdg-desktop-portal-hyprland[1028]: [LOG] Initializing xdph...
May 17 23:18:31 personal xdg-desktop-portal-hyprland[1028]: [CRITICAL] Couldn't connect to a wayland compositor
May 17 23:18:31 personal systemd[760]: Started Portal service (Hyprland implementation).
May 17 23:18:31 personal systemd[760]: xdg-desktop-portal-hyprland.service: Main process exited, code=exited, status=1/FAILURE
May 17 23:18:31 personal systemd[760]: xdg-desktop-portal-hyprland.service: Failed with result 'exit-code'.
May 17 23:18:31 personal systemd[760]: xdg-desktop-portal-hyprland.service: Scheduled restart job, restart counter is at 6.
May 17 23:18:31 personal systemd[760]: xdg-desktop-portal-hyprland.service: Start request repeated too quickly.
May 17 23:18:31 personal systemd[760]: xdg-desktop-portal-hyprland.service: Failed with result 'exit-code'.
May 17 23:18:31 personal systemd[760]: Failed to start Portal service (Hyprland implementation).

[zjeffer]

I've had the same issue for a while: xdg-desktop-portal-hyprland crashes very often (or always?) at Hyprland exit, and then tries to restart 5 times.

Here's coredumpctl's output:

╰─❯ coredumpctl info 7771
           PID: 7771 (xdg-desktop-por)
           UID: 1000 (zjeffer)
           GID: 1000 (zjeffer)
        Signal: 11 (SEGV)
     Timestamp: Sat 2025-08-23 12:13:48 CEST (5h 36min ago)
  Command Line: /usr/lib/xdg-desktop-portal-hyprland
    Executable: /usr/lib/xdg-desktop-portal-hyprland
 Control Group: /user.slice/user-1000.slice/user@1000.service/session.slice/xdg-desktop-portal-hyprland.service
          Unit: user@1000.service
     User Unit: xdg-desktop-portal-hyprland.service
         Slice: user-1000.slice
     Owner UID: 1000 (zjeffer)
       Boot ID: 4195955ca70f4db5a3d65c1309f85cad
    Machine ID: 0bc6190731da4c8a8d19b6d4708f70a5
      Hostname: north
       Storage: /var/lib/systemd/coredump/core.xdg-desktop-por.1000.4195955ca70f4db5a3d65c1309f85cad.7771.1755944028000000>
  Size on Disk: 171.2K
       Message: Process 7771 (xdg-desktop-por) of user 1000 dumped core.

                Stack trace of thread 7771:
                #0  0x00007f9ef832ac01 n/a (libwayland-client.so.0 + 0x5c01)
                #1  0x00007f9ef832ad81 n/a (libwayland-client.so.0 + 0x5d81)
                #2  0x00007f9ef832b2e7 wl_proxy_marshal_array_flags (libwayland-client.so.0 + 0x62e7)
                #3  0x00007f9ef832bfd3 wl_proxy_marshal_flags (libwayland-client.so.0 + 0x6fd3)
                #4  0x000055dc17740558 n/a (/usr/lib/xdg-desktop-portal-hyprland + 0xc3558)
                #5  0x000055dc176b90ad n/a (/usr/lib/xdg-desktop-portal-hyprland + 0x3c0ad)
                #6  0x000055dc176bd04a n/a (/usr/lib/xdg-desktop-portal-hyprland + 0x4004a)
                #7  0x00007f9ef7a40cb1 n/a (libc.so.6 + 0x40cb1)
                #8  0x00007f9ef7a40d8e exit (libc.so.6 + 0x40d8e)
                #9  0x00007f9ef7a2767c n/a (libc.so.6 + 0x2767c)
                #10 0x00007f9ef7a27729 __libc_start_main (libc.so.6 + 0x27729)
                #11 0x000055dc176b0be5 n/a (/usr/lib/xdg-desktop-portal-hyprland + 0x33be5)
                ELF object binary architecture: AMD x86-64

Looks like the same backtrace.