[vim/vim] GTK4 not working properly under XFCE on Fedora 44 (Issue #20307)

[Steven A. Falco]

stevefalco created an issue (vim/vim#20307)

Steps to reproduce

I updated this morning to vim-9.2.506-2 (which uses gtk4) on Fedora 44 under XFCE (X11). I noticed that my .vimrc file wasn't having the normal effect - my window was the wrong size and had the wrong font. When I tried to resize the window the text disappeared and I had to use ^L to refresh the screen.

I reverted to an earlier release (vim-9.2.506-1) which uses gtk3 and everything was back to normal.

I then tried building local copies based on the https://github.com/vim/vim.git code. When I configured using:

./configure --with-x --enable-gui=gtk3

the build worked fine. But when I tried using:

./configure --with-x --enable-gui=gtk4

then the build had the same problem as what I saw with the official Fedora build. I created a Fedora bug:

https://bugzilla.redhat.com/show_bug.cgi

Expected behaviour

The gtk4 version should work as well as the gtk3 version.

Version of Vim

vim-9.2.506-2

Environment

Fedora 44 XFCE X11

Logs and stack traces

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[Christian Brabandt]

chrisbra left a comment (vim/vim#20307)

What exactly is in your vimrc that does not work?

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[Steven A. Falco]

stevefalco left a comment (vim/vim#20307)

The "set guifont" line is not working, and neither is the "autocmd GUIEnter * set lines=40 columns=80" line. I attached the complete file for reference. This has been working perfectly for a long time with the gtk3 gui. It is just the Fedora changeover of vim to use gtk4 that is causing problems. I don't know if there is something wrong in their gtk4 library or in vim itself. Right now, I just know that the combination isn't working.

vimrc.zip

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[Christian Brabandt]

chrisbra left a comment (vim/vim#20307)

This seems to have been fixed as of #20269

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[Christian Brabandt]

Closed #20307 as completed.

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[Steven A. Falco]

stevefalco left a comment (vim/vim#20307)

This does not fix the issue for me. I've attached two screenshots from version v9.2.0526, which includes the gtk4 "cannot resize" patch. The smaller window is what I get when building for gtk4 while the larger window is what I get when building for gtk3.

Screenshot_20260524_102719.png (view on web) Screenshot_20260524_102818.png (view on web)

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[Steven A. Falco]

stevefalco left a comment (vim/vim#20307)

For some reason, I cannot reopen this issue. @chrisbra - please reopen it for me, or please give me whatever level of access is needed for me to reopen my own issues.

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[mattn]

Reopened #20307.

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[mattn]

mattn left a comment (vim/vim#20307)

Hi @stevefalco, opened #20317 which should fix this. Could you rebuild from that branch and confirm?

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[Christian Brabandt]

chrisbra left a comment (vim/vim#20307)

I cannot reproduce the issue. For me with a vimrc like this:

set cpo
au GuiEnter * set lines=40 columns=20

and vim -g -u /tmp/vimrc opens a gui with the expected size. Can you reproduce with a minimum vimrc file?

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[Steven A. Falco]

stevefalco left a comment (vim/vim#20307)

I tried building from mattn branch fix-gtk4-shellsize-redraw. That doesn't fix it.

I tried moving my ~/.vim directory out of the way, and replaced my .vimrc file with the two lines given by chrisbra. I launched via: /usr/local/bin/gvim -u $HOME/.vimrc foo to be sure I was getting the new .vimrc file.

The cpoptions shown are cpoptions=aAbBcCdDeEfFgHiIjJkKlLmMnoOpPqrRsStuvwWxXyZz$!%*-+<>;

I get a blank window that appears different than 40x20. However, :set lines reports 20 and :set columns reports 88, and as soon as I type the first : the window contents fill in. Here is the initial window before I type anything:

Screenshot_20260524_114315.png (view on web)

Once I type the :set columns I see:

Screenshot_20260524_114405.png (view on web)

And for completeness, here is the .vimrc file:

$ cat .vimrc
set cpo
au GuiEnter * set lines=40 columns=20

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[Steven A. Falco]

stevefalco left a comment (vim/vim#20307)

I just noticed something else bizarre. I went back to my previous .vimrc and stretched the window rather tall. I then selected Help->Version and tried to highlight the version text using the left mouse button. I got a very strange display:

Screenshot_20260524_115806.png (view on web)

That only seems to happen when highlighting the version output. If the window shows the file I am editing then the highlighting works properly:

Screenshot_20260524_120128.png (view on web)

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[Steven A. Falco]

stevefalco left a comment (vim/vim#20307)

Another visual problem is that I have no scrollbar when using gtk4. Normally, there would be a scrollbar on the right side of the window. Space appears to be allocated as can be seen in this screenshot, but there is no "thumb" or background for the scrollbar:

Screenshot_20260524_145054.png (view on web)

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