World of Warcraft

WoW 3.3.5a mostly works with Proton. but mouse camera movement is borked for all monitors except the primary monitor (camera of chaos). Video: https://www.youtube.com/watch?v=zl-WrmCkNsY

This appears to be caused by some issue with the way the X11 window and mouse cursor positions are being handled in Wine, possibly related to XWayland shenanigans.

Borked behaviour occurs with Proton-GE, Proton Experimental, Proton-EM and Wine-GE so it seems to impact most of the common Wine/Proton variants.

Here are some workaround options, although all of them suck in their own ways, none of them give native behaviour like on Windows.

Gamescope

This option is to run the game inside Valve's gamescope compositor. This does work to resolve the camera issue, but you don't get clipboard, which is annoying when trying to copy-paste your login password from your password manager. The window also can't be dynamically resized under gamescope, resulting in incorrect font sizing, letterboxing or pillarboxing (depending on what options you set for scaling).

Gamescope with clipboard

Gamescope clipboard only works in SDL backend at the moment. Using the SDL backend therefore fixes the clipboard. You also have to tell the SDL backend to use Wayland for windowing.

Pass this additional command line argument to gamescope:

--backend sdl

You also need to run it with this env var:

SDL_VIDEODRIVER=wayland

Camera and clipboard both work now!

Unfortunately, this causes the OS mouse cursor to be rendered over the top of the regular cursor. Ugh!

PROTON_ENABLE_WAYLAND

You can force Proton to use Wayland directly rather than going through XWayland by setting this env var:

PROTON_ENABLE_WAYLAND=1

This fixes the cursor issue, the clipboard works, and the mouse cursor visibility is also correct. Unfortunately the Wayland implementation in Proton is unfinished - using PROTON_ENABLE_WAYLAND breaks the window border and you get a Wine-rendered border instead. The window then can't be moved or resized properly. The only practical option when using PROTON_ENABLE_WAYLAND is to run the game in borderless windowed mode, then you can move the window between monitors using Win+Shift+Arrow without the camera breaking. It's no good if you want to run in regular windowed mode sadly. Possibly this will improve once Wayland implementation in Proton is actually finished.

/console rawMouseEnable 1

Sadly not able to test to see if this fixes the issue, because this setting wasn't added until 7.1.0 client version.