[Bug 53852] New: Launching wine resets DualShock 4 LED to default blue

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=53852

Bug ID: 53852
           Summary: Launching wine resets DualShock 4 LED to default blue
           Product: Wine
           Version: 7.19
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: hid
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Launching any application under wine (e.g. winecfg) resets DualShock 4 LED to
the default light blue light. Happens every time. The gamepad is connected over
Bluetooth and its LED is disabled upon connecting by my udev rules, so wine is
constantly breaking my configuration.

Steps to reproduce:

1. Connect DualShock 4 over Bluetooth.
2. Turn off the LED by "for f in
/sys/bus/hid/devices/0005:054C:05C4.000D/leds/*; do echo 0 > $f/brightness;
done". Here, 0005:054C:05C4.000D is the gamepad device id.
3. Run "wine winecfg".

This is on Kubuntu 22.04, Linux kernel 5.15.0-52-lowlatency.

Interestingly, even after running wine, all the "brightness" files still report
0. It looks like wine is somehow resetting the controller LED to the default
state without writing to these control files. In order to turn the LED off
again after that one has to write a non-zero value to the brightness files
first, and then zero again.