Green by Hiroshi Yoshimura
You’re right
Why not both?
Oh my, I feel woozy …
According to the PS4 user guide (https://manuals.playstation.net/document/en/ps4/settings/controlleroff.html) it can be done, so I reckon it is either a bug in the linux driver or in the Steam software.
Great blog post, give it a read.
The plot thickens …