plexamp: fails to launch (wayland, nvidia)

[ibrokemypie]

Nixpkgs version

• Unstable (25.05)

Describe the bug

Plexamp doesn't launch, instead of launching I get the attached log output.

Setting or unsetting NIXOS_OZONE_WL doesn't seem to make any difference.

Running the official plexamp appimage (4.12.1, though 4.12.0 also works) through appimage-run works fine:

nu> appimage-run Plexamp-4.12.1.AppImage
Uncompress Plexamp-4.12.1.AppImage of type 02 @ offset 188392
[================================================================================================================================================================|] 2357/2357 100%
Plexamp-4.12.1.AppImage is now installed in /home/noodle/.cache/appimage-run/8aa30c7453af408d41357b2228fee42015d1941531be14f7029245c70def7c15
Main: restoring window state from /home/noodle/.config/Plexamp/window-state-plexamp-main.json
Started Media Service: false
Linux: Registering MPRIS service.
Checking for update
Generated new staging user ID: 4376161e-4c13-527c-8256-60a1b1239f0a
Update for version 4.12.1 is not available (latest version: 4.12.1, downgrade is disallowed).
checkForUpdatesAndNotify called, downloadPromise is null

Steps to reproduce

Install plexamp through home.packages.

Run plexamp.

Expected behaviour

Plexamp launches.

Screenshots

No response

Relevant log output

nu> plexamp
Main: restoring window state from /home/noodle/.config/Plexamp/window-state-plexamp-main.json
Started Media Service: false
Linux: Registering MPRIS service.
libEGL warning: egl: failed to create dri2 screen
Fatal glibc error: tpp.c:83 (__pthread_tpp_change_priority): assertion failed: new_prio == -1 || (new_prio >= fifo_min_prio && new_prio <= fifo_max_prio)
[77512:0421/103906.063746:ERROR:gpu_process_host.cc(993)] GPU process exited unexpectedly: exit_code=134
Error: GPU process (undefined) crashed (134) :(
Quitting...

Additional context

Running on nixos unstable, updated yesterday, on nvidia hardware using the hyprland wayland compositor.

System metadata

nu> nix-shell -p nix-info --run "nix-info -m"
this path will be fetched (0.02 MiB download, 0.06 MiB unpacked):
/nix/store/plgd01gl1wvxyaxw2iafcr739s5icrsf-stdenv-linux
copying path '/nix/store/plgd01gl1wvxyaxw2iafcr739s5icrsf-stdenv-linux' from 'https://cache.nixos.org'...

• system: "x86_64-linux"
• host os: Linux 6.12.23, NixOS, 25.05 (Warbler), 25.05pre-git
• multi-user?: yes
• sandbox: yes
• version: nix-env (Lix, like Nix) 2.91.1 System type: x86_64-linux Additional system types: i686-linux, x86_64-v1-linux, x86_64-v2-linux, x86_64-v3-linux Features: gc, signed-caches System configuration file: /etc/nix/nix.conf User configuration files: /home/noodle/.config/nix/nix.conf:/etc/xdg/nix/nix.conf:/home/noodle/.nix-profile/etc/xdg/nix/nix.conf:/nix/profile/etc/xdg/nix/nix.conf:/home/noodle/.local/state/nix/profile/etc/xdg/nix/nix.conf:/etc/profiles/per-user/noodle/etc/xdg/nix/nix.conf:/nix/var/nix/profiles/default/etc/xdg/nix/nix.conf:/run/current-system/sw/etc/xdg/nix/nix.conf Store directory: /nix/store State directory: /nix/var/nix Data directory: /nix/store/jxs248g15qklggm9gfyddq822vkcrfg2-lix-2.91.1/share
• nixpkgs: /nix/store/isfbldda5j8j6x3nbv1zim0c0dpf90v8-source

Notify maintainers

@killercup @Redhawk18 @Synthetica9

---

Note for maintainers: Please tag this issue in your pull request description. (i.e. Resolves #ISSUE.)

I assert that this issue is relevant for Nixpkgs

• I assert that this is a bug and not a support request.
• I assert that this is not a duplicate of an existing issue.
• I assert that I have read the NixOS Code of Conduct and agree to abide by it.

Is this issue important to you?

Add a 👍 reaction to issues you find important.

[Redhawk18]

I'm on amd so you're out of luck. It works for me, try to delete your ~/.cache folder and try again. It could be bad/old shaders, those types of issues happen a lot with programs like vscode that are built on multi-plat frameworks.

[ibrokemypie]

I renamed .cache and still seem to get the same error:

nu> mv .cache .cache.bak
nu> plexamp
Main: restoring window state from /home/noodle/.config/Plexamp/window-state-plexamp-main.json
Started Media Service: false
Linux: Registering MPRIS service.
libEGL warning: egl: failed to create dri2 screen
Fatal glibc error: tpp.c:83 (__pthread_tpp_change_priority): assertion failed: new_prio == -1 || (new_prio >= fifo_min_prio && new_prio <= fifo_max_prio)
[107175:0501/195820.066466:ERROR:gpu_process_host.cc(993)] GPU process exited unexpectedly: exit_code=134
Error: GPU process (undefined) crashed (134) :(
Quitting...

[Redhawk18]

I can't fix a problem I can't reproduce, sorry. I would recommend testing this version on a different os since it seems like libEGL (mesa) is causing the crash. If you are mixing stable and unstable packages this could be a problem.

[Redhawk18]

I can't find any environment variables to disable gpu rendering, or anything else that would help. If you can't troubleshot it then I'll just have to mark the package as broken on cuda configs.

[ericpeden]

I have the same problem, also using wayland and an Nvidia card. A workaround for rendering issues with osu worked for me here: setting __EGL_VENDOR_LIBRARY_FILENAMES as mentioned in that issues, i.e.

env __EGL_VENDOR_LIBRARY_FILENAMES=/run/opengl-driver/share/glvnd/egl_vendor.d/10_nvidia.json plexamp

allows plexamp to launch successfully.

Not suggesting this as a suitable fix, but it's a usable workaround until the seemingly pervasive EGL problems can be worked out.

[ibrokemypie]

Seems to be working for me again! Nixpkgs 08f2208

[Redhawk18]

Happy to hear!!!

[gilest]

Was experiencing the same with environment.sessionVariables.NIXOS_OZONE_WL = "1";

Also on Nvidia and with Cosmic DE

Have been using a custom .desktop entry with --disable-gpu as a workaround

Without NIXOS_OZONE_WL=1 it launches without issue

[Redhawk18]

Was experiencing the same with environment.sessionVariables.NIXOS_OZONE_WL = "1";

Also on Nvidia and with Cosmic DE

Have been using a custom .desktop entry with --disable-gpu as a workaround

Without NIXOS_OZONE_WL=1 it launches without issue

Wait plexamp has a cli arg to disable the gpu? plexamp --disable-gpu doesn't do anything for me, I can still see it in nvtop as using my 7900xtx

[gilest]

I'm not an expert but I think there might be a matrix of factors, for example the NIXOS_OZONE_WL setting and the packaged version of plexamp.

I'm pretty certain --disable-gpu was having an effect previously.

Here's a ref and another ref to that flag

Can't find any actual docs though 🤔

Oh I think it might be an Electron/Chromium flag - ref here

[Redhawk18]

Does this disable for you? Maybe my method is flawed?

[gilest]

Does this disable for you? Maybe my method is flawed?

No, you're right.

I tried to repro with and without NIXOS_OZONE_WL and plexamp launches successfully in both cases now.

It seems that has been resolved sometime since nixos-unstable 2025-06-27

Apologies - my system was pinned to an older version due to follows, which I wasn't fully aware of 😅