Weird visual corruption issue with dash in horizontal position

[dimitri-vanlanduyt]

I prefer placing the dock in the top position and I have been using this wonderful extension for that. However, since a few weeks, the rendering of the dock in that specific position has started suffering from a form of "visual corruption" (see screenshots), both in the rendering of the app icons, and in the tooltips below. It appears to first render them correctly and then it changes ( I can sometimes see the change happening). This is consistent. I experienced the issue in Gnome 3.36 (F40) and now also in Gnome 3.37 (F41).

I tried disabling all other plugins and the issue persists. It does not occur with the dock in a different position.

Weirdly, this corruption seems to happen along a line that gradually decreases (see final screenshot and compare icon per icon and where the shift is happening in the Y plane: this decreases). Perhaps this observation this may give a hint towards the root cause, most probably not.

To Reproduce Visualise the dock

Expected behavior No visual corruption

Screenshots

System:

• OS: Fedora 40, 41
• Version of V-Shell extension: 47/70
• Source of installation: extension.gnome.org

[dimitri-vanlanduyt]

It also occurs in the bottom position, but not when the dock is rendered vertically.

[G-dH]

Have you tried reproducing the issue with V-Shell disabled?

[dimitri-vanlanduyt]

Yes, without the V-Shell extension, the dock renders perfectly fine.

[dimitri-vanlanduyt]

I just noticed that it only occurs when the dock includes icons of running apps that are not pinned.

On a workspace that only has pinned apps open , the corruption does not occur.

[G-dH]

Wayland or X11? Graphics driver? Are you using any custom theme? Does disabling the dash module in the V-Shell Settings help?

[dimitri-vanlanduyt]

Wayland/amdgpu. No custom theme. Turning off the dash module put the dock to the bottom and does not have the corruption issue (but also not the isolation in workspaces feature).

I do isolate workspaces (so the dock changes when I switch workspace), and I notice that it doesn't occur when I turn that off. We are getting closer

[G-dH]

I do isolate workspaces (so the dock changes when I switch workspace), and I notice that it doesn't occur when I turn that off

I noticed in your previous post that you're using this option and tested it myself, but it doesn't cause the issue on my system. In any case, V-Shell doesn't control dash rendering, so we can only hope to find a workaround if I can reproduce the issue.

[dimitri-vanlanduyt]

It's ugly but functional. In case I come into new findings, I will share them here.

[G-dH]

You can try this, when overview is open and the glitch is visible:

• open looking glass (Alt+F2 > lg > Enter)
• type Main.overview.dash.hide() and hit Enter
• type Main.overview.dash.show() and hit Enter
• press Escape key to close the lg

Can you still see the glitch?

[dimitri-vanlanduyt]

Yes, the glitch is still visible after that.

[G-dH]

How about switching workspaces in the overview? Are the icons still being recreated with the glitch?

[nsurvance]

I wanted to hop in here because I am also having this same issue, but I keep my dock positioned horizontally at the bottom.

I similarly am having this issue on Gnome 45 (F40) and 46 (F41). V-Shell Version 70 Installed from Extensions Manager AMD, Wayland and I do have an icon theme installed through gnome tweaks.

I do NOT isolate work spaces though. Mine is consistent acrossed workspaces and the visual bug appears across all of them as long as there is an unpinned app loaded--

https://github.com/user-attachments/assets/c966ae06-4b7a-46dc-bac0-57d4e04f2761

Issue still occurs with no other extensions on--

And the problem only occurs when Vshell is enabled--

https://github.com/user-attachments/assets/a84215ad-3855-4954-835b-d077084e2c41

I can also confirm that the issue disappears when no non-pinned apps are open. And disabling/enabling the dash in looking glass didn't work for me either :(

[G-dH]

It seems the horizontal position of the dock might not be rounded.

[G-dH]

When the overview is open and the glitch is visible, please open the looking glass (Alt+F2 > lg > Enter), execute Main.overview.dash.allocation.x1 Main.overview.dash.allocation.x2 Main.overview.dash.allocation.y1 Main.overview.dash.allocation.y2 and show me the outputs.

[dimitri-vanlanduyt]

x1 = 394.5 y1 = 44 x2 = 1795.5 y2 = 156

[G-dH]

Thanks. Can you install the V-Shell from the repository and let me know if the fix helped?

[dimitri-vanlanduyt]

It solved the issue!! Thank you so much for the follow-up and the fix (I just bought you a few coffees)

[G-dH]

Thank you very much @dimitri-vanlanduyt! I really appreciate your feedback and support.