USB shows disconnected on Raspberry Pi 5 USB 2 port #393

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opened 2026-02-20 08:22:24 -05:00 by deekerman · 0 comments

deekerman commented

2026-02-20 08:22:24 -05:00

Owner

Originally created by @wcbonner on GitHub (Aug 25, 2025).

Disclaimer

I have read and understood the disclaimer.

Application version

0.4.6

System version

0.2.5

Device model

JetKVM

Extension model

None

Remote device Hardware

Raspberry Pi 5

Remote device OS

Debian 12.11 (Raspberry Pi OS 64 bit) Linux version 6.12.34+rpt-rpi-2712 (serge@raspberrypi.com) (aarch64-linux-gnu-gcc-12 (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40) #1 SMP PREEMPT Debian 1:6.12.34-1+rpt1~bookworm (2025-06-26)

Bug description

When the JetKVM is connected to the black USB 2.0 ports, it powers on and the display is captured but the USB reports disconnected.

I'm booting from a USB SSD in the top USB 3 port. I had a four port USB 3 hub connected in the lower USB 3 port. When the jetkvm was plugged into the USB 2 port the jetkvm appeared to function, but reported no USB connection.

I finally tried disconnecting the hub and connecting the jetkvm to the lower USB 3 port and USB is functioning.

I assumed Keyboard and Mouse functionality should work fine without the extra speed.

I normally leave the hub plugged in because when I plug other devices into the Pi5 temporarily, it's much less likely to jostle cables and reboot the device.

Originally created by @wcbonner on GitHub (Aug 25, 2025). ### Disclaimer - [x] I have read and understood the disclaimer. ### Application version 0.4.6 ### System version 0.2.5 ### Device model JetKVM ### Extension model None ### Remote device Hardware Raspberry Pi 5 ### Remote device OS Debian 12.11 (Raspberry Pi OS 64 bit) Linux version 6.12.34+rpt-rpi-2712 (serge@raspberrypi.com) (aarch64-linux-gnu-gcc-12 (Debian 12.2.0-14+deb12u1) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40) #1 SMP PREEMPT Debian 1:6.12.34-1+rpt1~bookworm (2025-06-26) ### Bug description When the JetKVM is connected to the black USB 2.0 ports, it powers on and the display is captured but the USB reports disconnected. I'm booting from a USB SSD in the top USB 3 port. I had a four port USB 3 hub connected in the lower USB 3 port. When the jetkvm was plugged into the USB 2 port the jetkvm appeared to function, but reported no USB connection. I finally tried disconnecting the hub and connecting the jetkvm to the lower USB 3 port and USB is functioning. I assumed Keyboard and Mouse functionality should work fine without the extra speed. I normally leave the hub plugged in because when I plug other devices into the Pi5 temporarily, it's much less likely to jostle cables and reboot the device.