Tested at the same time as #1679435 on Xenial, and I can confirm it fixes the problem.
gnome-software: Installed: 3.20.1+git20170427.0.3d09239-0ubuntu1~xenial1 Candidate: 3.20.1+git20170427.0.3d09239-0ubuntu1~xenial1 Version table: *** 3.20.1+git20170427.0.3d09239-0ubuntu1~xenial1 500 500 http://gb.archive.ubuntu.com/ubuntu xenial-proposed/main amd64 Packages 100 /var/lib/dpkg/status 3.20.1+git20170208.0.a34b091-0ubuntu1~xenial1 500 500 http://gb.archive.ubuntu.com/ubuntu xenial-updates/main amd64 Packages 3.20.1+git20160420.1.ca63436.ubuntu-xenial-0ubuntu2 500 500 http://gb.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
Tested at the same time as #1679435 on Xenial, and I can confirm it fixes the problem.
gnome-software: git20170427. 0.3d09239- 0ubuntu1~ xenial1 git20170427. 0.3d09239- 0ubuntu1~ xenial1 git20170427. 0.3d09239- 0ubuntu1~ xenial1 500 gb.archive. ubuntu. com/ubuntu xenial- proposed/ main amd64 Packages dpkg/status 20.1+git2017020 8.0.a34b091- 0ubuntu1~ xenial1 500 gb.archive. ubuntu. com/ubuntu xenial-updates/main amd64 Packages 20.1+git2016042 0.1.ca63436. ubuntu- xenial- 0ubuntu2 500 gb.archive. ubuntu. com/ubuntu xenial/main amd64 Packages
Installed: 3.20.1+
Candidate: 3.20.1+
Version table:
*** 3.20.1+
500 http://
100 /var/lib/
3.
500 http://
3.
500 http://