cc @infinisil

@infinisil I tried with kernel 4.19 and I can reproduce your behavior, at boot the ACL isn't applied.

Edit: sorry for the noise, I just forgot to enable my module

(triage) @infinisil, you appear to have been involved in the discussion in #49367. I think this PR matches your statement at #49367 (comment) ; but you may want to review it?

I have confirmed this udev setting works.

I was trying to use a PS3 controller with steam (to play a windows-only game with Proton) and it wasn't working because steam couldn't read /dev/uinput.

After adding this udev rule, it started working.

+1 from me for merging this in.

edit: oops, looks like I spoke too soon. With the udev rule proposed in this PR, a windows-only game with Proton (Overcooked) is only able to see one controller, not multiple controllers.

I still end up getting these messages in steam's stdout:

Couldn't initialize virtual gamepad: Couldn't open /dev/uinput for writing

This is strange, since my user should have permission to write to /dev/uinput:

$ getfacl /dev/uinput 
getfacl: Removing leading '/' from absolute path names
# file: dev/uinput
# owner: root
# group: root
user::rw-
user:illabout:rw-               #effective:---
group::---
mask::---
other::---

Maybe this is caused from the chroot environment steam is running in (actually I haven't looked into this at all, so I don't really know what I'm talking about here)?

If I manually run chmod o+rw /dev/uinput, then Overcooked can see both controllers I have.

Also, what is strange is that steam itself can see all my controllers, it is just Overcooked that is not able to.

As a work-around, I'm using the following setting:

services.udev.extraRules = ''
  KERNEL=="uinput", SUBSYSTEM=="misc", TAG+="uaccess", OPTIONS+="static_node=uinput", GROUP="input", MODE="0660"
'';

This sets /dev/uinput to have a group of input and be readable/writable by this group. This appears to work. With this udev rule, I'm able to use multiple controllers in a game using Proton.

Are there any updates on this pull request, please?

My preference would be for this pull request #49367 as the rule is added in the same file as the other related ones.
Also this file was released with an open license so it's not a problem to patch it anymore.

EDIT: ValveSoftware/steam-for-linux#4794 (comment)

distros should be repackaging the udev rules for their own setup

Please see #66916