Xbox Controller still shown as connected after disconnecting

[OffApparition]

Version of xpadneo

xpadneo-dkms 0.9.6-1

Controller Model

• [ ] Xbox One S controller
• [ ] Xbox Elite 2 controller
• [X] Xbox Series X|S controller
• [ ] Other:

Connection mode

• [X] Bluetooth connection
• [ ] USB cable (not yet supported)
• [ ] Xbox Dongle connection (not yet supported)

Installed Software

• [ ] Anti-Micro (may affect button mappings)
• [ ] OpenRGB (may mess up mappings and rumble stability)
• [ ] Steam Input (enabled by default via Steam Desktop client)
• [ ] Steam Link (usually via Raspberry Pi or other micro computers)
• [ ] devices with QMK firmware (may affect udev rules, similar to OpenRGB)
• [ ] netstick (shares input devices via network similar to Steam Link)
• [ ] xboxdrv (user-space gamepad driver)
• [ ] xone (kernel-space gamepad driver using the Xbox dongle or USB)
• [ ] xow (alternative driver using the Xbox dongle)

Protocol Information

Please help us identify at which layer the problem can be found if you want to report mapping errors or if the controller fails to be detected:

• [X] Steam Proton games are having issues
• [ ] Steam Linux-native games are having issues
  • [X] I don't use Steam or did not try
• [ ] games running through Lutris, wine and/or Bottles are having issues
  • [X] I don't use Lutris, Bottles, wine or did not try
• [ ] Linux-native games are having issues
  • [X] I don't use native games or did not try
• [ ] Other software is having issues (describe software and issues below)
• [ ] Running evtest is showing issues (describe the issues below)
  • Keep in mind that BTN_NORTH and BTN_WEST are intentionally swapped
• [ ] Running jstest is showing issues (describe the issues below)
  • [X] I don't have this tool or don't know how to use it
• [ ] Running gamepad-tool is showing issues (post console output below)
  • [X] I don't have this tool

Please describe how it is failing below in the next sections.

Severity / Impact

• [X] I've read the docs and the bug reporting instructions
• [X] I've applied the latest firmware update to the controller
• [X] I've tried disabling or running without above mentioned software
• [ ] It does not work at all
• [ ] It used to work in a previous version
• [X] It mostly works but sometimes it doesn't
• [ ] I found a work-around
• [ ] I probably didn't figure it all out but it's too early to give up
• [ ] I don't know how to ...
• [ ] It's too complicated
• [ ] Fantastic work but ...
• [ ] I can code and I want to help

Describe the Bug

After disconnecting my Xbox Controller, my system still shows that the controller is connected. Steam will show controller support for my Xbox Controller on game pages (it does not do that when no controller is connected). Furthermore, I can see the controller under System Settings > Game Controller (on KDE). It shows my Xbox Controller (/dev/input/event22). When running the following command after disconnecting the controller

# lsmod | grep hid_xpadneo
hid_xpadneo            40960  0
ff_memless             20480  1 hid_xpadneo

I can still see xpadneo even though no controller is connected.

This messes up other controller inputs, e.g. when connecting my PS4 controller after the Xbox controller was disconnected. Input will behave in a weird manner. Buttons will be sent constantly pressed and the input of the other controller will be drowned by constant input being sent from the already disconnected controller.

Steps to Reproduce

1. Connect Xbox Controller
2. Disconnect Xbox Controller
3. Controller is still shown

Expected Behavior

Controller should not be shown anymore.

Screenshots / GIFs / Videos

The controller was not connect to the computer while these screenshots were taken.

Usually in the System Settings there is no entry (when booting the system before connecting the Xbox controller) and Steam does not show any controller support information.

System Information

# uname -a
Linux spectra 6.9.1-zen1-2-zen #1 ZEN SMP PREEMPT_DYNAMIC Wed, 22 May 2024 13:47:12 +0000 x86_64 GNU/Linux

# xxd -c20 -g1 /sys/module/hid_xpadneo/drivers/hid:xpadneo/0005:045E:*/report_descriptor | tee >(cksum)
00000000: 05 01 09 05 a1 01 85 01 09 01 a1 00 09 30 09 31 15 00 27 ff  .............0.1..'.
00000014: ff 00 00 95 02 75 10 81 02 c0 09 01 a1 00 09 33 09 34 15 00  .....u.........3.4..
00000028: 27 ff ff 00 00 95 02 75 10 81 02 c0 05 01 09 32 15 00 26 ff  '......u.......2..&.
0000003c: 03 95 01 75 0a 81 02 15 00 25 00 75 06 95 01 81 03 05 01 09  ...u.....%.u........
00000050: 35 15 00 26 ff 03 95 01 75 0a 81 02 15 00 25 00 75 06 95 01  5..&....u.....%.u...
00000064: 81 03 05 01 09 39 15 01 25 08 35 00 46 3b 01 66 14 00 75 04  .....9..%.5.F;.f..u.
00000078: 95 01 81 42 75 04 95 01 15 00 25 00 35 00 45 00 65 00 81 03  ...Bu.....%.5.E.e...
0000008c: 05 09 19 01 29 0c 15 00 25 01 75 01 95 0c 81 02 15 00 25 00  ....)...%.u.......%.
000000a0: 75 01 95 04 81 03 05 0c 0a b2 00 15 00 25 01 95 01 75 01 81  u............%...u..
000000b4: 02 15 00 25 00 75 07 95 01 81 03 05 0f 09 21 85 03 a1 02 09  ...%.u........!.....
000000c8: 97 15 00 25 01 75 04 95 01 91 02 15 00 25 00 75 04 95 01 91  ...%.u.......%.u....
000000dc: 03 09 70 15 00 25 64 75 08 95 04 91 02 09 50 66 01 10 55 0e  ..p..%du......Pf..U.
000000f0: 15 00 26 ff 00 75 08 95 01 91 02 09 a7 15 00 26 ff 00 75 08  ..&..u.........&..u.
00000104: 95 01 91 02 65 00 55 00 09 7c 15 00 26 ff 00 75 08 95 01 91  ....e.U..|..&..u....
00000118: 02 c0 c0                                                     ...
2986910699 1363

Controller and Bluetooth Information

Additional Context

[kakra]

This is a new behavior of bluez that it no longer destroy input device of disconnected endpoints, and reuses the same input device node if the endpoint reconnects. You can disable this behavior in the bluez config.

And yes, it messes up Steam games if you switch controllers because many Windows games often only look at the first controller.

I'm leaving this open so we can document this behavior. I currently can't recall where I found the info about that change, it was in one of the commits to bluez, pointing to a hidden configuration variable you can set.