Serious Ubuntu upgrade problem
I successfully added the Musescore 2 PPA for Ubuntu Trusty, then attempted to update to install MS. Oddly, it didn't update. I uninstalled Musescore 1.3. Still no sign of MS 2. I know, I did it backwards, and I didn't create a backup either.
Still, what files would I look for? Sometimes a program is installed that doesn't appear automatically in the menus. If I can guess what file to look for and the correct command line, I can add the menu item manually.
But I also have a broken system. Update gives an error message that "Not all updates can be installed". It offers a partial update, which will lead to a lot of unneeded qt packages (and packages to be removed), among others--if I choose to accept it. Is there any chance that this breakage is due to the PPA? Does the PPA involve replacing qt library components?
EDIT: It's pretty much diagnosed in the next message. Suggestions welcome. Thanks.