Huawei Scrcpy 2.4 UHID keyboard and mouse Error

[ji4ozhu]

• [* ] I have read the FAQ.
• [* ] I have searched in existing issues.

Environment

• OS: [Windows 10]
• scrcpy version: [2.4]
• installation method: [Original Download Scrcpy 2.4 x64]
• device model:Huawei P9 Plus (VIE-AL 10)
• Android version: [Android 8.0.0]

C:\Users\Wanli\Desktop\scrcpy-win64-v2.4>scrcpy -K
scrcpy 2.4 https://github.com/Genymobile/scrcpy
INFO: ADB device found:
INFO: --> (usb) 8FS7N16A19001893 device VIE_AL10
C:\Users\Wanli\Desktop\scrcpy-win64-v2.4\scrcpy-server: 1 file pushed, 0 skipped. 185.6 MB/s (69007 bytes in 0.000s)
[server] INFO: Device: [HUAWEI] HUAWEI VIE-AL10 (Android 8.0.0)
[server] WARN: Audio disabled: it is not supported before Android 11
[server] ERROR: Controller error
java.io.IOException: android.system.ErrnoException: open failed: EACCES (Permission denied)
at com.genymobile.scrcpy.UhidManager.open(UhidManager.java:66)
at com.genymobile.scrcpy.Controller.handleEvent(Controller.java:208)
at com.genymobile.scrcpy.Controller.control(Controller.java:97)
at com.genymobile.scrcpy.Controller.lambda$start$0$com-genymobile-scrcpy-Controller(Controller.java:105)
at com.genymobile.scrcpy.Controller$$ExternalSyntheticLambda1.run(Unknown Source:4)
at java.lang.Thread.run(Thread.java:784)
Caused by: android.system.ErrnoException: open failed: EACCES (Permission denied)
at libcore.io.Linux.open(Native Method)
at libcore.io.BlockGuardOs.open(BlockGuardOs.java:207)
at android.system.Os.open(Os.java:354)
at com.genymobile.scrcpy.UhidManager.open(UhidManager.java:49)
... 5 more
INFO: Renderer: direct3d
ERROR: Demuxer 'video': stream disabled due to connection error
WARN: Demuxer 'audio': stream explicitly disabled by the device
ERROR: Demuxer error

C:\Users\Wanli\Desktop\scrcpy-win64-v2.4>

If the -K parameter is not used, it starts normally.

[rom1v]

Yes, UHID does not work on old Android versions:

• [WIP] UHID mouse/keyboard input #4473 (comment)
• Controller error "java.io.IOException: android.system.ErrnoException: open failed: EACCES (Permission denied)" #4811

Apparently (according to reported issues) UHID works for Android >= 10 (but I'm not sure, it might depend on vendors).

[ji4ozhu]

thanks @rom1v