When upgrading your Ubuntu to a new version you also have to change all the PPAs to pull packages for that version. So in your case you have to go to /etc/apt/sourced.list.d/ and edit the right files. Then apt-get update and apt-get dist-upgrade.
The reason for those red borders is that its the default warning-look of darktable that gets shown whenever GTK breaks our theming.
I forgot to mention in my original post that I had already updated the PPA for Ubuntu 17.04. And that didn’t cure the problem.
After trials and errors, I found that problem was caused by this file: ~/.config/darktable/darktable.css
I noticed that this file wouldn’t exist in a fresh install of the latest version of a darktable. After I deleted the file, darktable is back to normal.
Hi All,
well same here after upgrading from 16.04 LTS to 18.04 LTS as far as I can see I updated all package sources. I do not have the darktable.css file
Hi
thanks for pointing me to the right direction… I just edited the .css file as mentioned in there. ( the font … line ) et voila… it works. I still get GTK errors when I start darktable from command line but it at least looks ok now