Your system information

• Steam client version (build number or date): last stable version as dated of this post
• Distribution (e.g. Ubuntu): ubuntu 20.04
• Opted into Steam client beta?: [Yes/No] no
• Have you checked for system updates?: [Yes/No] yes

Please describe your issue in as much detail as possible:

Describe what you expected should happen and what did happen. Please link any large code pastes as a Github Gist

Steam Remote Play - Multiple host display results in offset mouse location.

Host :
OS Windows 10 [up to date]
CPU Ryzen 1700 16 thread
GPU 5700XT
RAM 32gb2933mhz
Monitors = 1x4k portrait left, 1x4k top, 1x1080 bottom
Primary display = 1080p bottom screen

Client[s] :
OS Ubuntu 20.04
CPU Xeon 1231v3 8 thread
GPU RX480
RAM 8gb
Monitors = 1x4k

laptop
ubuntu 20.10
ryzen 2700u
16gb ram
1080p@60hz 1.5 scaling

Any game launched on client has the mouse offset by some pixels. I have seen on steam forums that others are confirming the issue. Turning off the hosts other monitors resolves the issue.

Is the translation of mouse location being warped by windows having a large spread of monitors?

Ideally, host should ignore displays the game is -not- on if possible when calculating anything?

Thank you for your work.

Steps for reproducing this issue:

1. have windows host have multiple screens that have varying dpi
2. use Linux client
3. mouse position will be offset