[BUG] Half-Life Alyx View is Very Glitchy

[Sgt-Schultz]

Describe the bug The view in the menu randomly jerks up and down and the game is basically unplayable. After I managed to click new game I found that the same problem is in the actual game too. For some reason the "click trigger to continue" rooms are normal.

To Reproduce Steps to reproduce the behavior:

1. Launch the game

Expected behavior View does not jerk around

System Information (please complete the following information):

• Distribution: Ubuntu 18.10
• SteamVR version: Beta 1.11.8
• Steam client version: 3/26/20
• Opted into Steam client beta?: NO
• Graphics driver version: NVIDIA Driver Version: 390.116
• Gist for SteamVR System Information: https://gist.github.com/Sgt-Schultz/c66dfaaf85b10d99717c233701fff8fb

Additional context Using Proton 5.0-5 for Half-Life Alyx. Also I was previously getting an error on launch "unable to to find a valid direct3d device" but after some looking I found that using the launch option "PROTON_USE_WINED3D=1 %command%" fixed that, not sure if it has to do with this problem.

Note: Commenters who are also experiencing this issue are encouraged to include the "System Information" section in their replies.

[kisak-valve]

Hello @Sgt-Schultz, Ubuntu 18.10 has been unsupported for over a year, nVidia 390 is older than the support cutoff for Proton, and PROTON_USE_WINED3D=1 tells Proton to try to use wine's DirectX to OpenGL render path, which is known to come with a severe performance penalty and is considered unsupported.

Additionally, we're tracking issues with games run with Proton in the Proton issue tracker. If you still have trouble after updating to a distro release that is actively supported by the distro, a recent nVidia driver release, and drop the diagnostic env variable, please add your experience to https://github.com/ValveSoftware/Proton/issues/3681 and we can ponder it further.