Before answering the following list of questions, have you tried the
following:
Create a new, regular, user. Then log in as that new user. Do you have the
same problems as the new user?
Just to clarify the details of your system:
0.) "i have copied the home folder via deja dup to another computer with
Trisquel mini that worked fine before" Is that what you have done here? You
copied your home folder from another system to the one you are now having
problems with? What happens when you use the default home folder given for a
new user?
1.) What version of Trisquel are you using? Is it Trisquel-Mini? If so, what
version?
2.) Did you choose all the defaults at installation? In other words, if I
went through the installer on your hardware and accepted every single default
choice would I get your exact setup?
3.) After installation, did you make any major system changes? Are you using
the same window manager? What window manager is that? You mentioned
Openbox, is that the default, or did you add that?
4.) Are you using the same DE as the default? Was the default XFCE?
5. Has this installation worked before? If so, what are some of the recent
changes that you have made?
6.) Has everything worked since your last big change?
Basically, what changes have you made to the default Trisquel-Mini install?