SpellForce: Platinum Edition (39540)

[ZarimSF]

Compatibility Report

• Name of the game with compatibility issues: SpellForce: Platinum Edition
• Steam AppID of the game: 39540

System Information

• GPU: RX 580
• Driver/LLVM version: Mesa 18.3.6
• Kernel version: 4.19.0-16-amd64
• Link to full system information report as Gist: https://gist.github.com/ZarimSF/c39da568493312ee48d1fe4e208ea50e
• Proton version: Proton Experimental
• Log: steam-39540.log

I confirm:

• that I haven't found an existing compatibility report for this game.
• that I have checked whether there are updates for my system available.

Symptoms

When right- or middle-clicking, the click does not release anymore.
Afterwards, you are not able to give any mouse button inputs, not even in the menu.
The same does not happen for left clicks.

Reproduction

Perform a right or middle click in the game (menu is fine) that lasts longer than a couple milliseconds. If you almost instantaneously release the mouse button, the click releases normally.

Notes

This only happens with Proton Experimental, with other releases this issue does not exist.
I understand that the designation "Experimental" doesn't come from nowhere, however the performance is a lot better compared to 6.3-4 and prior. I am mainly hoping, that someone might know what causes the issue or has experienced something similar.

[kisak-valve]

Hello @ZarimSF, we're using one issue report per unofficially supported game title, so I've gone ahead and transferred this issue report to #686 (comment).

[ZarimSF]

Sorry about that, I thought it was one issue per bug. If I had thought a bit longer I could have guessed that it was meant as one issue per game.
Thanks for explaining and moving