Thank you, Scott and all here. I have tested now the situation on 4 computers and I can confirm, that the gpaste-extension for the GNOME Shell interferes with LyX, so that problems in selecting text occur.
As soon as I remove gpaste LyX works normally. The gpaste extension consists of 4 packages: gpaste (this seems to be the gpaste-demon), gnome- shell-extensions-gpaste (the visible shell extension), gir1.2-gpaste-4.0, libgpaste4. I am not sure, whether it is the shell-extension, that causes the problems or the underlying gpaste-demon. It is still strange, that only LyX has those text-selection problems, whereas all other programs work normally together with gpaste. Also LyX worked fine prior to Ubuntu 16.04. In Debian 8.x gpaste has the version 3.14-2, in Ubuntu it has the version 3.18.3-1. Anyway gpaste causes some other strange problems in Ubuntu 16.04. The gpaste-demon seems to trigger an XORG-process which consumes extreme amounts of CPU-power. So I would give the advice that gpaste should not be used in Ubuntu 16.04; it can be replaced by Clipboard Indicator, which can be installed online via the GNOME extensions website. Thank you for all the help and best wishes, yours, Hermann Josef Am Thu, 09 Jun 2016 17:58:35 -0400 schrieb Scott Kostyshak: > On Thu, Jun 09, 2016 at 09:08:16PM +0000, Hermann Josef Eckl wrote: >> Thank you very much, Jean-Marc. It seems, that you gave me an important >> hint for the solution of my problem. >> >> I have installed the "gpaste"-extension for the GNOME Shell, which is >> provided as a package of Ubuntu 16.04. >> >> It seems that gpaste has some severe bugs. As soon as I remove it, the >> text selection problems in LyX are totally gone. It is a little bit >> strange, that this affects only LyX and no other programs. Therefore I >> never thought, that gpaste could be the cause of this problem. In >> Debian 8 gpaste works fine with LyX and generally all programs. >> >> I will now test the situation on all of my four computers, where I have >> installed LyX / Ubuntu 16.04. If the removal of gpaste also clears the >> problems in LyX everywhere, then I think we have found the solution. >> >> Thank you so much, with best wishes, >> Hermann Josef > > Good job figuring out the problem! First, it is not necessarily the case > that LyX is not to blame. LyX could be the problem, or gpaste could be > the problem, or other updates due to 16.04 could be the problem. It is > hard to say. > > Hopefully you can make progress in identifying where the bug comes from > so that you can report it to the right place so that future users won't > have the same issue. I think that would take you a lot of time though. > > Best, > > Scott > > >> >> Am Thu, 09 Jun 2016 12:22:34 +0200 schrieb Jean-Marc Lasgouttes: >> >> > Le 08/06/2016 à 09:06, Hermann J. Eckl a écrit : >> >> Currently I have installed Ubuntu 16.04 LTS - and am facing a very >> >> strange an annoying problem: I have difficulties to select longer or >> >> even shortes pieces of text with the keyboard or mouse. >> > >> > That seems very strange an annoying indeed. >> > >> >> If I am trying to select some text, the selection captures only >> >> short passages and fails after some words or paragraphs, regardless >> >> of whether I am selecting with the mouse or with keyboard shortcuts. >> >> ALl other programmes (text editor, Libre Office etc.) are working >> >> correctly and I can select text withput any problems. >> > >> > Do you run any utilisty related to clipboard (clipboard manager of >> > some sort)? >> > >> > JMarc >> >>
