Cursor input "low resolution" with Hi-DPI in gnome-shell #98927

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opened 2022-06-16 12:02:04 +02:00 by Campbell Barton · 4 comments

With gnome 42, mouse cursor input is locked quantized by the Hi-DPI scale.

This makes painting for e.g. not have such smooth input when the scale is above 1 (Hi-DPI).

This seems to be a bug/limitation in gnome-shell (mutter), since the same bug doesn't exist in river compositor for e.g.

  • Running under GNOME Shell 42.2.
  • 9bed68de13 with WITH_GHOST_WAYLAND=ON.
  • This impacts both Wayland and Blender running in X11 via Xwayland.
  • This doesn't impact tablet input.

Here is the result of drawing on an image 1:1 with the display scale set to 400%.

Screenshot from 2022-06-16 21-20-59.png


Reporting this for reference, since users are likely to run into this error.

With gnome 42, mouse cursor input is locked quantized by the Hi-DPI scale. This makes painting for e.g. not have such smooth input when the `scale` is above 1 (Hi-DPI). This seems to be a bug/limitation in gnome-shell (mutter), since the same bug doesn't exist in river compositor for e.g. - Running under `GNOME Shell 42.2`. - 9bed68de13 with `WITH_GHOST_WAYLAND=ON`. - This impacts both Wayland and Blender running in X11 via Xwayland. - This doesn't impact tablet input. Here is the result of drawing on an image 1:1 with the display scale set to 400%. ![Screenshot from 2022-06-16 21-20-59.png](https://archive.blender.org/developer/F13173614/Screenshot_from_2022-06-16_21-20-59.png) ---- Reporting this for reference, since users are likely to run into this error.
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Added subscriber: @ideasman42

Added subscriber: @ideasman42
Campbell Barton changed title from Cursor input "low resolution" with Hi-DPI in Gnome-Shell to Wayland cursor input "low resolution" with Hi-DPI in Gnome-Shell 2022-06-16 12:06:08 +02:00

Added subscriber: @christian.rauch

Added subscriber: @christian.rauch

Can you link the upstream bug report at GNOME here? It would be good to know if this is a server or client bug by having references to similar issues in other compositors or clients.

Can you link the upstream bug report at GNOME here? It would be good to know if this is a server or client bug by having references to similar issues in other compositors or clients.
Campbell Barton changed title from Wayland cursor input "low resolution" with Hi-DPI in Gnome-Shell to Cursor input "low resolution" with Hi-DPI in gnome-shell 2022-06-16 13:31:38 +02:00
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As far as I can see this hasn't been reported to gnome-shell, created a new report: https://gitlab.gnome.org/GNOME/mutter/-/issues/2311

Noticed this also impacts Blender under Xwayland.

As far as I can see this hasn't been reported to gnome-shell, created a new report: https://gitlab.gnome.org/GNOME/mutter/-/issues/2311 Noticed this also impacts Blender under Xwayland.
Dalai Felinto added
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labels 2023-02-10 12:01:24 +01:00
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Reference: blender/blender#98927
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