RealVNC server not connecting locally after update from 20.10 to 21.04

[Gilles Gravier]

Karl,

On 27/04/2021 13:16, Karl Auer wrote:
> On Tue, 2021-04-27 at 11:56 +0100, Colin Law wrote:
>> On Tue, 27 Apr 2021 at 10:24, Gilles Gravier <ggravier at fsfe.org>
>> wrote:
>>> No VMs involved. :) On my Ubuntu laptop I run RealVNC in service
>>> mode. On that same laptop I can't run vnc-viewer localhost:5900 or
>>> telnet localhost 5900
>> Is that a typo?  Do you mean you *can* run it using localhost?
> I think he means he runs the server on his laptop, but cannot connect
> to it locally, neither with the client software nor with telnet.
>
> Gilles, if netstat -rn does not show something listening on 5900, then
> *nothing is listening on 5900*. It is a total waste of time to try to
> connect to it. You need to find out why RealVNC is not providing local
> service.

Indeed. And why it was working before...

Gilles