Hi!
I encountered same issue already posted in drag_and_drop.C but in ROOT 6.24/00. The drag_and_drop.C macro from tutorials/gui/ doesn’t work, dragging item to canvas does nothing. It works only after opening the TBrowser via File->Browse and it works also after manually closing the TBrowser. It will also work after adding new TBrowser() into the main drag_and_drop() function, however it stops working after calling destructor.
I am working on a GUI which will run on different distributions and ROOT versions. I am looking for some quick and dirty fix, for example is it possible to run TBrowser without the GUI?
I am using CentOS7 and ROOT 6.24 and I reproduced it also on Debian9 with both ROOT 5.34 and 6.18.
As far as I remember, switching from a session “without graphics” to a session “with graphics” never worked (one could only switch the other way around).