[Bug 1962403] [NEW] Gamepads are no longer detected

[FurretUber]

Public bug reported:

After the upgrade from Firefox deb to Firefox snap, my gamepad is no
longer being detected.

One gamepad is a Feitun FM0013, a gamepad with at least 5 operation
modes I've found so far: Nintendo Switch Pro Controller, X-Box wired
controller, PS3 wired controller, PS3 wireless controller and generic
Bluetooth controller.

>From these 5 operation modes, X-Box wired controller, PS3 wired
controller and generic Bluetooth controller work on my computer, while
Nintendo Switch Pro Controller mode is found but doesn't detect any
buttons while using PS3 wireless controller mode isn't found.

When using on my notebook and smartphone, I normally use this gamepad in
generic Bluetooth controller mode, as I want to use it wirelessly more
often. I have noticed that any of the modes that worked with Firefox deb
(X-Box wired controller, PS3 wired controller and generic Bluetooth
controller) stopped working with the snap.

Steps to reproduce:

1) Have Firefox installed as a snap;
2) Connect gamepad with one of its compatible modes;
3) Access page/game to test the gamepad (https://hacks.mozilla.org/2013/12/the-gamepad-api/ or https://luser.github.io/gamepadtest/ or http://www.cross-code.com/en/start for example);
4) Notice how the gamepad isn't detected.

I have a Redragon Seymur 2 too, and it also isn't detected. Using the
Firefox from the Mozilla page, the gamepads are found and appear as
follow in the luser's page:

gamepad: 0079-0006-DragonRise Inc. Generic USB Joystick
gamepad: 045e-028e-Microsoft X-Box 360 pad

The X-Box 360 one is the Feitun. Using Bluetooth, the Feitun appear as:

gamepad: 1949-0402-Gamepad

So, unfortunately, Firefox snap is unusable to play games while using
gamepads. For example, I can play CrossCode on the Chromium snap, but am
unable to play it on Firefox snap.

ProblemType: Bug
DistroRelease: Ubuntu 22.04
Package: firefox 1:1snap1-0ubuntu1
ProcVersionSignature: Ubuntu 5.15.0-22.22-generic 5.15.19
Uname: Linux 5.15.0-22-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu78
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: XFCE
Date: Sun Feb 27 11:25:06 2022
InstallationDate: Installed on 2017-06-13 (1719 days ago)
InstallationMedia: Xubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
Snap.Changes: não foram encontradas alterações
SourcePackage: firefox
UpgradeStatus: Upgraded to jammy on 2019-12-22 (797 days ago)
modified.conffile..etc.cron.daily.apport: [deleted]

** Affects: firefox (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug jammy package-from-proposed third-party-packages

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Title:
  Gamepads are no longer detected

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