screen not displaying with Startech hdmi to usb adapter

I bought a startech hdmi to usb adapter a few weeks ago.

I've installed the driver for my ubuntu, display was doing fine.

However, a few weeks later, the screen is now, not displaying any images.

Funny part is that the star tech adapter is recognized when I plugged it in and the strange thing is that the sound channel is using the startech adapter.

Not sure, what is wrong.

When I type xrandr, no additional HDMI plugin is seen.

This is the plugin I'm talking about.

I've done all the required updates through apt update.

If you have any ideas, I'm more than glad to hear them.

PS: I was thinking to have a look at the BIOS but not sure, what I should be looking for.

Update

This is my config after a lsusb -t without the connector

/: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/6p, 10000M |__ Port 1: Dev 7, If 0, Class=Hub, Driver=hub/4p, 5000M
/: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/12p, 480M |__ Port 1: Dev 9, If 0, Class=Hub, Driver=hub/4p, 480M |__ Port 4: Dev 12, If 0, Class=Vendor Specific Class, Driver=asix, 480M |__ Port 2: Dev 11, If 1, Class=Human Interface Device, Driver=usbhid, 1.5M |__ Port 2: Dev 11, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M |__ Port 1: Dev 10, If 0, Class=Human Interface Device, Driver=usbhid, 12M |__ Port 1: Dev 10, If 1, Class=Human Interface Device, Driver=usbhid, 12M |__ Port 5: Dev 3, If 0, Class=Vendor Specific Class, Driver=, 12M |__ Port 6: Dev 5, If 0, Class=Video, Driver=uvcvideo, 480M |__ Port 6: Dev 5, If 1, Class=Video, Driver=uvcvideo, 480M |__ Port 10: Dev 7, If 0, Class=Wireless, Driver=btusb, 12M |__ Port 10: Dev 7, If 1, Class=Wireless, Driver=btusb, 12M
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 10000M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/1p, 480M

This is my config after a lsusb -t with the connector

/: Bus 04.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/6p, 10000M |__ Port 1: Dev 7, If 0, Class=Hub, Driver=hub/4p, 5000M |__ Port 2: Dev 9, If 0, Class=Vendor Specific Class, Driver=, 5000M |__ Port 2: Dev 9, If 1, Class=Application Specific Interface, Driver=, 5000M |__ Port 2: Dev 9, If 2, Class=Audio, Driver=snd-usb-audio, 5000M |__ Port 2: Dev 9, If 3, Class=Audio, Driver=snd-usb-audio, 5000M |__ Port 2: Dev 9, If 4, Class=Audio, Driver=snd-usb-audio, 5000M
/: Bus 03.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/12p, 480M |__ Port 1: Dev 9, If 0, Class=Hub, Driver=hub/4p, 480M |__ Port 4: Dev 12, If 0, Class=Vendor Specific Class, Driver=asix, 480M |__ Port 2: Dev 11, If 1, Class=Human Interface Device, Driver=usbhid, 1.5M |__ Port 2: Dev 11, If 0, Class=Human Interface Device, Driver=usbhid, 1.5M |__ Port 1: Dev 10, If 0, Class=Human Interface Device, Driver=usbhid, 12M |__ Port 1: Dev 10, If 1, Class=Human Interface Device, Driver=usbhid, 12M |__ Port 5: Dev 3, If 0, Class=Vendor Specific Class, Driver=, 12M |__ Port 6: Dev 5, If 0, Class=Video, Driver=uvcvideo, 480M |__ Port 6: Dev 5, If 1, Class=Video, Driver=uvcvideo, 480M |__ Port 10: Dev 7, If 0, Class=Wireless, Driver=btusb, 12M |__ Port 10: Dev 7, If 1, Class=Wireless, Driver=btusb, 12M
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p, 10000M
/: Bus 01.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/1p, 480M

1 Answer

As you say the adapter works fine on other computers the adapter appears fine. Being a DisplayLink adapter it requires drivers for video to appear. I believe the reason you get audio is that the adapter has one chip for audio and a different one for video, and the driver for audio is working but the video driver is not. Did you attempt any repairs of the drivers?

I'd check the HDMI cable for damage if you didn't rule that out already. Make sure both ends are secure in their sockets.

If the drivers are fine, the cable is fine, and the adapter is fine, then perhaps there was some damage to the USB port. Do other USB 3.0 devices work fine in that port? Could there be bent pins?