Troubleshooting
What to do when your agent's desktop doesn't start, stays black, or a program can't open it (Link Desktop).
"no Xvfb here"
The tool found no Xvfb to start the display with. Install it, or name
its program with --xvfb <program>.
"display :120 is taken"
Another X server took the display number your agent's desktop keeps,
in ~/Link/Agents/<agent>/Desktop/display. Stop that server, or delete
the file and run lnk agent tool add desktop again, which picks the
first number no X server holds.
The screenshot is black
Nothing is on the desktop yet, since it starts empty: start a program
with run.
A program says it can't open the display
It was started before the desktop, which starts at the tool's first call: take a screenshot first, then start it.