If that worked, try Application.ProcessMessages instead of the timer.
Thanks, but that did not make any difference either.
Even using the "fix_gtk_clip" did not work. Stepping through it, the "t" in this "t := Clipboard.AsText;" was empty as it was closing down.
The thing is, that many people have stated that other programs work fine with cut/paste without special Clipboard-Managers, so there must be a solution.
The timer workaround is adequate for my needs right now, but it would be nice to not keep finding the frailties of using Linux and Lazarus. I wonder if Kylix is still available some where.