Is there an existing issue for this?

• [X] I have searched the existing issues

Are you using any gamescope patches or a forked version of gamescope?

• [X] The issue occurs on upstream gamescope without any modifications

Current Behavior

The issue here is that, when running Steam with Gamescope in SteamOS mode, steamwebhelper crashes after invoking steam -shutdown.

I've created a script called steamos-session-select, a simple bash script that invokes steam -shutdown, and placed it in /usr/bin. I then launch Steam using Gamescope to launch in SteamOS mode using the following.

gamescope -e -- steam -steamdeck -steamos3

When I then select Switch to Desktop, this calls /usr/bin/steamos-session-select (which invokes steam -shutdown). Steam appears to shutdown gracefully, but then a crash report is generated with the reason steamwebhelper killed by SIGTRAP.

This is tested on Fedora 41. This brings up a pop up on the desktop from the Automatic Bug Reporting Tool (ABRT). This issue also occurs on Arch Linux.

This is also tested in embedded mode with a custom gamescope-session bash script that invokes gamescope --mangoapp -e -- steam -steamdeck -steamos3.

Steps To Reproduce

1. Open a terminal window and launch Steam with Gamescope with gamescope -e -- steam -steamdeck -steamos3.
2. Open another terminal window and run steam -shutdown
3. A crash report is generated.
4. Use journalctl -f to refer to the points when the crash has happened.

Hardware information

- Distro: Fedora 41
- CPU: AMD Ryzen 9 6900HX
- GPU: AMD Radeon 680M
- Driver Version: Mesa 24.3.2 (LLVM 19.1.5)

Software information

- Desktop environment: KDE 6.2.5
- Session type: wayland
- Gamescope version: gamescope version  (gcc 14.2.1)
- Gamescope launch command(s): gamescope -e -- steam -steamdeck -steamos3

Which gamescope backends have the issue you are reporting?

• [X] Wayland (default for nested gamescope)
• [X] DRM (default for embedded gamescope, i.e. gamescope-session)
• [ ] SDL
• [ ] OpenVR

Logging, screenshots, or anything else

systemd-coredump[10829]: [🡕] Process 10555 (steamwebhelper) of user 1000 dumped >

                                                  Module libpciaccess.so.0 from rpm libpciaccess-0.16-13.>
                                                  Module libxml2.so.2 from rpm libxml2-2.12.9-1.fc41.x86_>
                                                  Module [dso] from rpm libpciaccess-0.16-13.fc41.x86_64
                                                  Module libdrm_amdgpu.so.1 without build-id.
                                                  Module libdrm_amdgpu.so.1
                                                  Module libelf.so.1 without build-id.
                                                  Module libelf.so.1
                                                  Module libdrm_radeon.so.1 without build-id.
                                                  Module libdrm_radeon.so.1
                                                  Module libxcb-sync.so.1 without build-id.
                                                  Module libxcb-sync.so.1
                                                  Module libxcb-randr.so.0 without build-id.
                                                  Module libxcb-randr.so.0
                                                  Module libsensors.so.4 from rpm lm_sensors-3.6.0-20.fc4>
                                                  Module libxshmfence.so.1 without build-id.
                                                  Module libxshmfence.so.1
                                                  Module libunistring.so.5 from rpm libunistring-1.1-8.fc>
                                                  Stack trace of thread 10555:
                                                  #0  0x00007f83b4ecabcf n/a (n/a + 0x0)
                                                  ValveSoftware/gamescope#1  0x00007f83b4eca69b n/a (n/a + 0x0)
                                                  ValveSoftware/gamescope#2  0x00007f83b4ecac49 n/a (n/a + 0x0)
                                                  ValveSoftware/gamescope#3  0x00007f83b379e1f7 n/a (n/a + 0x0)
                                                  ValveSoftware/gamescope#4  0x00007f83b379b646 n/a (n/a + 0x0)
                                                  ValveSoftware/gamescope#5  0x00007f83b379a29b n/a (n/a + 0x0)
                                                  ValveSoftware/gamescope#6  0x00007f83b37a5d68 n/a (n/a + 0x0)
                                                  ValveSoftware/gamescope#7  0x00007f83b37a7167 n/a (n/a + 0x0)
                                                  ValveSoftware/gamescope#8  0x00007f83b35c1b51 n/a (n/a + 0x0)
                                                  ValveSoftware/gamescope#9  0x00007f83b3625f7b n/a (n/a + 0x0)
                                                  ValveSoftware/gamescope#10 0x00007f83b3626191 n/a (n/a + 0x0)
                                                  ValveSoftware/gamescope#11 0x00007f83b4f1ac7f n/a (n/a + 0x0)
                                                  ValveSoftware/gamescope#12 0x00007f83b4f3bb96 n/a (n/a + 0x0)
                                                  ValveSoftware/gamescope#13 0x00007f83b4fa19de n/a (n/a + 0x0)
                                                  ValveSoftware/gamescope#14 0x00007f83ae720e6b n/a (n/a + 0x0)
                                                  ELF object binary architecture: AMD x86-64