I just completed do-release-upgrade on a Dell Latitude 2100 mini laptop to 18.04 from 16.04. (It only took two tries - I did make a Clonezilla backup first.) I had updated from to 16.04 from 14.04 a couple of years ago by the same method. That was the first time I had ever done a release update. The computer boots and seems to work except…
The computer serves as a music player in my workshop. I have a low privilege user account which automatically logs on and opens audacious on the left half of the screen and resumes playing any .mp3 files in the play list. caja opens on the right half of the screen and displays my music library. That is what it did in 16.04 and 14.04. That is what it almost does in 18.04.
The first time I booted after the upgrade all worked as expected. The account performed its autologon, audacious and caja opened. Each occupied half of the screen. I selected a directory of music files in caja and dragged them to audacious. So far, so good. I clicked on the button in audacious to start playing. That worked. However, the audacious window increased in width to occupy about 60% of the screen. I can NOT reduce the width of the window. I can decrease the height of the window.
Further investigation finds that some windows can be set to any size (terminal, caja, firefox) but audacious seems to have a minimum width. system monitor seems to have both a minimum width and a minimum height.
The display resolution is set to 1024 x 600 - which is correct for this device. I have seen limitations on window size for dialog windows but never for application windows. I am at a loss. Any suggestions?