Wayland clamps cursor movement failes with gnome-shell (fixed up-stream) #98793

New Issue

Caden Mitchell · 2022-06-11T14:36:18+02:00

Caden Mitchell commented

2022-06-11 14:36:18 +02:00

System Information
Operating system: Fedora 36 GNOME (on Wayland)
Graphics card: AMD Radeon RX 5700 XT

Blender Version
Broken: 3.3.0 alpha, 38bfa53081, master, 2022-06-09
Worked: 3.3.0 alpha, e90ba74d3e, master, 2022-06-05

Short description of error
On Gnome-shell with Blender compiled with "WITH_GHOST_WAYLAND", the cursor get's locked to a portion of the screen when trying to resize panels. It also has a similar behavior with sculpting and weight painting, similar to #98714.

Exact steps for others to reproduce the error
Compile with Wayland, then, try to resize the panels vertically, in the Shading tab for instance.

NOTE: this was a bug in gnome-shell which has since been fixed: https://gitlab.gnome.org/GNOME/mutter/-/issues/2110

    As this impacts gnome-42 we may still need to workaround the bug.

**System Information** Operating system: Fedora 36 GNOME (on Wayland) Graphics card: AMD Radeon RX 5700 XT **Blender Version** Broken: 3.3.0 alpha, 38bfa53081e9, master, 2022-06-09 Worked: 3.3.0 alpha, e90ba74d3eb8, master, 2022-06-05 **Short description of error** On Gnome-shell with Blender compiled with "WITH_GHOST_WAYLAND", the cursor get's locked to a portion of the screen when trying to resize panels. It also has a similar behavior with sculpting and weight painting, similar to #98714. **Exact steps for others to reproduce the error** Compile with Wayland, then, try to resize the panels vertically, in the Shading tab for instance. ---- NOTE: this was a bug in gnome-shell which has since been fixed: https://gitlab.gnome.org/GNOME/mutter/-/issues/2110 ``` As this impacts gnome-42 we may still need to workaround the bug.

Caden Mitchell commented

2022-06-11 14:36:18 +02:00

Added subscriber: @Caden-Mitchell

Campbell Barton commented

2022-06-12 04:28:30 +02:00

Added subscriber: @ideasman42

Campbell Barton commented

2022-06-12 04:28:30 +02:00

Changed status from 'Needs Triage' to: 'Confirmed'

Campbell Barton commented

2022-06-12 04:28:30 +02:00

Some notes on this issue:

Previously when this worked, grabbing the pointer would always lock it's position, now the cursor is confined to the surface, the problem is exposed.
This is only an issue in gnome-shell, the bug should be fixed up-stream (it works in KDE for example).
This bug only impacts UI scale other than 1.

This bug has been reported to Gnome: https://gitlab.gnome.org/GNOME/mutter/-/issues/2110

Some notes on this issue: - Previously when this worked, grabbing the pointer would always lock it's position, now the cursor is confined to the surface, the problem is exposed. - This is only an issue in gnome-shell, the bug should be fixed up-stream (it works in KDE for example). - This bug only impacts UI scale other than 1. ---- This bug has been reported to Gnome: https://gitlab.gnome.org/GNOME/mutter/-/issues/2110

Campbell Barton changed title from ~~Wayland build clamps cursor movement~~ to GNOME/Shell + wayland clamps cursor movement (confining cursor to the window fails with gnome-shell)

2022-06-12 04:29:42 +02:00

Campbell Barton changed title from ~~GNOME/Shell + wayland clamps cursor movement (confining cursor to the window fails with gnome-shell)~~ to Wayland clamps cursor movement (confining cursor to the window fails with gnome-shell)

2022-06-12 04:31:08 +02:00

Caden Mitchell commented

2022-06-13 05:11:32 +02:00

In #98793#1373022, @ideasman42 wrote:
Some notes on this issue:

Previously when this worked, grabbing the pointer would always lock it's position, now the cursor is confined to the surface, the problem is exposed.

This is only an issue in gnome-shell, the bug should be fixed up-stream (it works in KDE for example).

This bug only impacts UI scale other than 1.

This bug has been reported to Gnome: https://gitlab.gnome.org/GNOME/mutter/-/issues/2110

Indeed, my screen scale is 300%. This is because not only is my display 4K, but it is also a TV, meaning the UI needs to be slightly larger than usual. 300% scaling also seems to have other unintended side-effects in the current version of Gnome-shell and Mutter than Fedora 36 ships. Here is a relevant Gnome Shell issue .

> In #98793#1373022, @ideasman42 wrote: > Some notes on this issue: > > - Previously when this worked, grabbing the pointer would always lock it's position, now the cursor is confined to the surface, the problem is exposed. > - This is only an issue in gnome-shell, the bug should be fixed up-stream (it works in KDE for example). > - This bug only impacts UI scale other than 1. > > ---- > > This bug has been reported to Gnome: https://gitlab.gnome.org/GNOME/mutter/-/issues/2110 Indeed, my screen scale is 300%. This is because not only is my display 4K, but it is also a TV, meaning the UI needs to be slightly larger than usual. 300% scaling also seems to have other unintended side-effects in the current version of Gnome-shell and Mutter than Fedora 36 ships. Here is a relevant Gnome Shell [issue ](https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/5500).

Campbell Barton commented

2022-06-13 08:53:57 +02:00

Note that we could workaround this by using a software cursor (as is done for cursor warping) and confine the cursor to the window ourselves, this may be the best option short term. This would only need to be done when using gnome-shell with a scaled UI.

Caden Mitchell commented

2022-06-13 09:06:59 +02:00

In #98793#1373450, @ideasman42 wrote:
Note that we could workaround this by using a software cursor (as is done for cursor warping) and confine the cursor to the window ourselves, this may be the best option short term. This would only need to be done when using gnome-shell with a scaled UI.

That sounds like it may be a good option. Perhaps it could also be placed under "Developer Extras" or something? Who knows, may be interesting to test it on other Wayland desktops for debugging.

> In #98793#1373450, @ideasman42 wrote: > Note that we could workaround this by using a software cursor (as is done for cursor warping) and confine the cursor to the window ourselves, this may be the best option short term. This would only need to be done when using gnome-shell with a scaled UI. That sounds like it may be a good option. Perhaps it could also be placed under "Developer Extras" or something? Who knows, may be interesting to test it on other Wayland desktops for debugging.

Campbell Barton changed title from ~~Wayland clamps cursor movement (confining cursor to the window fails with gnome-shell)~~ to Wayland clamps cursor movement failes with gnome-shell (fixed up-stream)

2022-06-16 06:07:38 +02:00

Caden Mitchell commented

2022-06-16 11:46:56 +02:00

I'd like to add, running the X11 version of Blender on Wayland works perfectly fine. However, Blender runs somewhat slower this way, compared to running it as a native Wayland app.