[Lazarus] Clipboard problem with Lazarus using VNC

[Mark Morgan Lloyd]

Michael Schnell wrote:

> Any Linux Desktop software uses an X interface as a display. Hence an X 
> server is running.

This would probably be a good place to point out (for the benefit of 
less experienced users) that X's terminology is a bit odd: an "X server" 
provides graphics services to programs (in the same way that an SQL 
server provides database services).

So the X server is typically running on the machine on your desktop with 
the physically-attached screen/keyboard/mouse, even if you've logged 
into a headless host (e.g. a "server" in a 19" rack) where your programs 
and source are stored.

The exception to this is when you're running VNC in which case the X 
server is embedded in the VNC server (i.e. they're linked together into 
a single binary), and you're talking to this using a VNC client. In this 
scenario, c&p events have to be sent over the VNC protocol and injected 
into the X server, hence hopefully into your program.

If you're not running VNC, you can have any number of programs on 
different hosts but all the UI interaction comes through the single X 
server on your desktop system. My experience is that things like c&p are 
seamless /but/ there can be performance problems and on occasion I've 
seen a debugger getting confused, however if you don't see one of these 
cases it's to be preferred over VNC.

-- 
Mark Morgan Lloyd
markMLl .AT. telemetry.co .DOT. uk

[Opinions above are the author's, not those of his employers or colleagues]