With older versions of ubuntu this questions answers still worked. Now they don't.

The repositories aren't reachable and building from source fails because of dependency errors.

I've found this PPA, but it isn't working either:

The following packages have unmet dependencies: libgegl-0.0-0 : Depends: libpng12-0 (>= 1.2.13-4) which is a virtual package and is not provided by any available package

How do you go back to the last sane version of gimp: 2.6?

  • One easy way is to install an appropriate flavor of 14.04 or Ubuntu 16.04. Other ways depend upon your skill and your hardware's capabilities. – user535733 Dec 22 '18 at 19:23
  • Why "sane"? If your problem is the Save-v.s.-Export controversy in 2.8, there are ways around it. They should also work in 2.10 (which is really a quantum leap from 2.8). – xenoid Dec 22 '18 at 20:07
  • Any software that answers me "no" upon telling it to save is clearly insane. I tried the workarounds. They didn't work out for me. 2.6 works for me and the only way it could be better is by allowing a shortcut to automatically get a rectangle selection with certain size, like 300px*250px, since it's a little tough to select that with a mouse unless the zoom is right. – Ocean Dec 22 '18 at 20:32
  • You can save that as a preset for the Rectangle select tool, or even set the Rectangle tool to that and then save the tools options in the Preferences to make that the default. – xenoid Dec 23 '18 at 15:52
  • That's neat, but without the ability to toggle between fixed and free via keyboard it's not all that useful. – Ocean Dec 29 '18 at 17:50

Add Malcolm Scott's repository using:

sudo add-apt-repository ppa:malcscott/gimp-2.6

gimp depends on libpng12-0 which is not available in official repository of Bionic. You can download it from Xenial packages download page or direct download. Install it using;

sudo dpkg -i libpng12-0_1.2.54-1ubuntu1.1_amd64.deb

Now install gimp using

sudo apt install gimp

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