Thank you for your support.
I tried all that you recommended.
I removed gnome earlier.
I disabled gdm3 (sudo systemctl disable gdm3) - this didn’t help.
I tried a new SD card with DeepStream SDK training course - no mouse and keyboard on these two usb ports detected.
However, my video camera attached to either of these two usb ports via usb adapter works fine.
Is this a problem with hardware? Is there any option to find a solution to this problem?
Is that video camera a SS speed class USB device? Sounds like if HS/FS device is not able to use.
If changing the sdcard also not brings it back, I think it might be hardware problem. Have you tried new sdcard new sdkmanager too? Sdkmanager will flash more things than only replacing sdcard image.
While working on my main SD card, I use normal video camera Canon Legria and connect it to Jetson via Video Capture Card, 1080P HDMI Capture Card (HDMI to USB 2.0 Video Capture):
I tried a new SD card, different from my main card, and I burned it for DeepStream DLI course - as I wrote before, only third USB port could work with either a mouse or a keyboard.