(2nd December 2016, 22:51)leszek Wrote: Then it is an upstream bug. You can use gwenview to save the jpg file as png. So basic conversion as a workaround should work for you.
It's no problem to do the conversion in png format.
Code:
convert rose.jpg rose.png.
Login screen, lock screen, logout screen use the same avatar. There must be a strict rule that all use the png format. Lock screen, logout screen work with jpg and jpeg an avatar.