GTK 2/3 and GTK 4 conflict when launching on Fedora 42

[mayk0l]

Summary:

When launching Claude Desktop on Fedora 42, the app crashes immediately with a GTK error related to conflicting GTK versions.

Steps to reproduce:

1. Install the RPM package on Fedora 42
2. Run claude-desktop or launch using Electron with the provided app.asar

Observed error:

(process:XXXXX): Gtk-ERROR **: GTK 2/3 symbols detected. Using GTK 2/3 and GTK 4 in the same process is not supported
/usr/local/lib/node_modules/electron/dist/electron exited with signal SIGTRAP

System info:

• Fedora 42 (fully updated)
• Electron 36.2.1 installed globally
• gtk4 installed

Notes:

• Issue occurs both when running the RPM and when launching with Electron directly.
• Seems to be a packaging or dependency conflict between GTK versions on Fedora 40+.

Is there a recommended fix or a compatible package for Fedora 42?

[regulad]

I was able to reproduce this on my Kinoite Fedora 42 setup.

[delocalizer]

workaround:

claude-desktop --gtk-version=3

[regulad]

The workaround I chose to employ was creating a toolbox container running fd41 and launch it from inside of that. Worked fine.

…

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[steckes]

I added the flag --gtk-version=3 directly to the execution script in the build-fedora.sh here:

claude-desktop-fedora/build-fedora.sh

Line 363 in 8aca321

electron /usr/lib64/claude-desktop/app.asar --ozone-platform-hint=auto --enable-logging=file --log-file=\$LOG_FILE --log-level=INFO "\$@"

electron /usr/lib64/claude-desktop/app.asar --gtk-version=3 --ozone-platform-hint=auto --enable-logging=file --log-file=$LOG_FILE --log-level=INFO "$@"

Now it actually runs from the commandline without specifying the gtk-version, but unfortunately it still does not work through the fedora app drawer.

Also changing the Exec= entry in /usr/share/applications/claude-desktop.desktop did not help :(

Why is electron always such a pain :(

[steckes]

Nope it actually worked like this! The actual issue on my machine was that it couldn't find electron when launching the Desktop file, so I passed the full path to electron into this /usr/bin/claude-desktop file :)

[rickscode]

I forked and fixed this issue if people are still experiencing it

https://github.com/rickscode/claude-desktop-fedora

[mancubus77]

Did anyone manage making app working under Wayland?
I'm getting

[627578:0628/002650.787692:ERROR:content/browser/browser_main_loop.cc:278] Gtk: gtk_widget_get_scale_factor: assertion 'GTK_IS_WIDGET (widget)' failed

[mnoukhov]

I'm running Fedora 42 with wayland its working fine. I do get the same error about Gtk: gtk_widget_get_scale_factor: assertion 'GTK_IS_WIDGET (widget)' failed but run continues just fine

[mancubus77]

Thanks @mnoukhov
I dropped few parameters, and it's working fine now
electron /usr/lib64/claude-desktop/app.asar --enable-logging=file --log-file=$LOG_FILE --log-level=INFO --disable-gpu-sandbox --no-sandbox "$@"

[mdx0111]

I'm running Fedora 42 with wayland its working fine. I do get the same error about Gtk: gtk_widget_get_scale_factor: assertion 'GTK_IS_WIDGET (widget)' failed but run continues just fine

Do you get the title bar at all? I don't have any close, minimize or maximize buttons.
I'm on Fedora 42, KDE and Wayland.

[mdx0111]

Okay, I just modified the app.asar and repacked it. Now I have the menu bar and the title bar. I just need to get rid of the yellow bar on top of the window.

[mdx0111]

I forked and fixed this issue if people are still experiencing it

https://github.com/rickscode/claude-desktop-fedora

Sorry, I don't see in your repo how this is fixed. Do you mind explaining your fix please?
Thanks

[divy-03]

Okay, I just modified the app.asar and repacked it. Now I have the menu bar and the title bar. I just need to get rid of the yellow bar on top of the window.

electron /usr/lib64/claude-desktop/app.asar --enable-logging=file --log-file=$LOG_FILE --log-level=INFO --disable-gpu-sandbox --no-sandbox "$@"
using this i am able to launch claude but not with app launcher directly.
So, @mdx0111 how did you exactly updated your app.asar to launch claude-desktop

ps: did you managed to get rid of the bar on the top

[mmstroik]

using this i am able to launch claude but not with app launcher directly. So, @mdx0111 how did you exactly updated your app.asar to launch claude-desktop

ps: did you managed to get rid of the bar on the top

desktop launchers often have a limited PATH compared to your terminal. make sure you are passing the full path to electron in the /usr/bin/claude-desktop file.

In terms of getting the title/menu bar to show up and removing the yellow bar at the top, the way I fixed it was:

1. extract the app.asar:

cd /usr/lib64/claude-desktop/
sudo npx asar extract app.asar app-unpacked

2. enable native titlebar:

sudo sed -i 's/titleBarStyle:"hidden",titleBarOverlay:\(oc\|sc\|Xi\),/titleBarStyle:"default",/' /usr/lib64/claude-desktop/app-unpacked/.vite/build/index.js

3. remove the yellow overlay bar:

sudo sed -i 's/\(Sw\|Tw\|JC\)=\(pn\|Er\)?0:36/\1=0/g' /usr/lib64/claude-desktop/app-unpacked/.vite/build/index.js

4. fix bottom overflow (recalculate the bounds after the titlebar is rendered):

sudo sed -i 's/e\.setOpacity(100)},50)})/e.setOpacity(100),i()},50)})/' /usr/lib64/claude-desktop/app-unpacked/.vite/build/index.jsRetry

5. repack:

sudo npx asar pack app-unpacked app.asar

[mdx0111]

Okay, I just modified the app.asar and repacked it. Now I have the menu bar and the title bar. I just need to get rid of the yellow bar on top of the window.

electron /usr/lib64/claude-desktop/app.asar --enable-logging=file --log-file=$LOG_FILE --log-level=INFO --disable-gpu-sandbox --no-sandbox "$@" using this i am able to launch claude but not with app launcher directly. So, @mdx0111 how did you exactly updated your app.asar to launch claude-desktop

ps: did you managed to get rid of the bar on the top

Sorry, been extremely busy recently.

Glad it's answered by @mmstroik. Thanks!