ValveSoftware / ValveSoftware/Proton

Vertical mouse movement glitch

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#976 6 comments 1 reaction 0 assignees View on GitHub

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Dominant language
C++
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Description

I have troubles with vertical mouse movements in some games.
These glitches feels like when you move optical mouse on a bad surface. Like game just ignores mouse input every N frames. If i move mouse vertical and horizontal - this happens with horizontal movement too, but if only horizontal - no issue.

This happened for me with:
F.E.A.R
S.T.A.L.K.E.R.: Shadow of Chernobyl

Most horrifying is in F.E.A.R.
In stalker it feels like your pointer is in bottom screen edge and can't move lower, but if you move your mouse bit faster, it moved down.

This issue may be related with this: https://github.com/ValveSoftware/Proton/issues/831
BUT this issue isn't resolved by changing resolution to native - it just feels bit less horrifying.

My specs: https://gist.github.com/XakepSDK/1c0873e69dd836e190105794ab729679
Proton: 3.7-3
Built: Aug 29 2018, at 20:07:05

Contributor guide

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the vertical and combined mouse-movement behavior in F.E.A.R. and S.T.A.L.K.E.R.: Shadow of Chernobyl with Proton 3.7-3, using the reported hardware details and comparing horizontal-only movement. Trace the input path to identify where vertical events are lost; done means movement is consistent in the affected games.

Written by the indexing model from the issue text.

Assessment

Tech stack
cpp
Domain
game-dev, operating-systems
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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