My ubuntu 18.04 has prohibited sign on screen and I can’t operate it.

bthoven · 01-08-2020, 07:37 AM

It just happened this morning. I reboot it a few times and still can’t type anything. Need help...thanks.

michaelk · 01-08-2020, 08:45 AM

At first glance I would guess the graphics at the top and the prohibited sign are either from the BIOS/UEFI or the monitor if it has USB ports.

Is this a desktop or laptop?

Does the computer use USB or PS/2 ports?

Does the mouse work?

If the keyboard is USB what happens if you unplug the keyboard?

If your computer is a desktop could the CMOS battery need replacing?

bthoven · 01-08-2020, 10:32 AM

Quote:

Originally Posted by michaelk

At first glance I would guess the graphics at the top and the prohibited sign are either from the BIOS/UEFI or the monitor if it has USB ports.

Is this a desktop or laptop? It is a headless mini pc. Access via Realvnc client

Does the computer use USB or PS/2 ports? 1 rtl-sdr dongle and 1 zigbee dongle

Does the mouse work? No mouse connected.

If the keyboard is USB what happens if you unplug the keyboard? No keyboard.

If your computer is a desktop could the CMOS battery need replacing? Not sure about this because the date and time are still correct, , perhaps by ntp update via wifi

Pls see my reply in line above.

michaelk · 01-08-2020, 10:48 AM

What type of computer are you using for the client?

I assume that it works without problems if not connected to your headless PC?

bthoven · 01-08-2020, 11:13 AM

Quote:

Originally Posted by michaelk

What type of computer are you using for the client? I usually vnc from my Win 10 PC/laptop or my ipad.

I assume that it works without problems if not connected to your headless PC? Yes, Ubuntu server software, apache, mysql, etc...still work without problem. Just that I can’t control via its desktop gui. Ssh to it from any client is still working.

Xxxxxxxx

bthoven · 01-08-2020, 08:33 PM

On my laptop, after running Realvnc client and see the Ubuntu desktop with the prohibited sign, I send ctrl+alt+del command and back out from it; then I can continue working on it. However, on my desktop, the same solution did not work.