Mouse doesn't update position unless mouse button is held down

[totaam]

Issue migrated from trac ticket # 2371

component: client | priority: major | resolution: needinfo

2019-07-29 11:35:19: Espionage724 created the issue

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Hi, I'm using Xpra with VirtualGL to try to play a game for rudimentary UI scaling (render the game at 1080p, stretch it up to 4K): https://i.imgur.com/fpHNI1D.jpg

If I start Xpra with just start (xpra start), the cursor on the game windows doesn't change position unless I hold down a mouse button.

If I start Xpra with start-desktop, the cursor updates fine, but the game window loses decoration and is in an awkward, unresizeable position: https://i.imgur.com/L1D5zk2.jpg

I'm thinking it could be solved with a flag or environment variable, but I'm unsure of what to try, and would appreciate any suggestions.

OS: Fedora Workstation 30 (GNOME)

[totaam]

2019-07-29 13:17:56: antoine changed owner from antoine to Espionage724

[totaam]

2019-07-29 13:17:56: antoine commented

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Odd. Whether you use start or start-desktop, the pointer's position is handled pretty much the same way.

You can verify that the position gets updated using:

• xpra -d mouse:

• the client will print do_send_mouse_position() position=['pointer-position', 1, [381, 220, 381, 149], ['mod2'], []],
• the server will print: xtest_fake_motion(-1, 451, 350) (different output if using uinput uinput virtual pointer device #1611)

• $ xpra info | grep cursor.position

Is the pointer really within the game's window?
Is there an open-source application I can use to reproduce?

[totaam]

2019-08-25 04:09:38: antoine changed status from new to closed

[totaam]

2019-08-25 04:09:38: antoine set resolution to needinfo

[totaam]

2019-08-25 04:09:38: antoine commented

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There were some important fixes related to focus issues and X11 event masks, those may have caused the bug you describe. See #2390#comment:24 for details.
This would have only affected the python3 client, which is not the default yet, but maybe that's what you used for testing?

Feel free to re-open if you can provide more information. (ie: a test case)