diff -Nru gnuplot-5.2.2+dfsg1/debian/changelog gnuplot-5.2.2+dfsg1/debian/changelog
--- gnuplot-5.2.2+dfsg1/debian/changelog	2017-11-09 04:40:21.000000000 +0000
+++ gnuplot-5.2.2+dfsg1/debian/changelog	2018-04-03 15:51:18.000000000 +0000
@@ -1,3 +1,10 @@
+gnuplot (5.2.2+dfsg1-2ubuntu1) bionic; urgency=medium
+ 
+  * Restore Provides/Breaks/Replaces needed for upgrades from xenial
+    (LP: #1754577).  This can be dropped after the bionic release.
+
+ -- Colin Watson <cjwatson@ubuntu.com>  Tue, 03 Apr 2018 16:51:18 +0100
+
 gnuplot (5.2.2+dfsg1-2) unstable; urgency=medium
 
   * [0bc35ea] Fix installation of non-arch files. (Closes: #881223)
diff -Nru gnuplot-5.2.2+dfsg1/debian/control gnuplot-5.2.2+dfsg1/debian/control
--- gnuplot-5.2.2+dfsg1/debian/control	2017-11-09 04:39:18.000000000 +0000
+++ gnuplot-5.2.2+dfsg1/debian/control	2018-04-03 15:51:18.000000000 +0000
@@ -1,5 +1,6 @@
 Source: gnuplot
-Maintainer: Debian Science Team <debian-science-maintainers@lists.alioth.debian.org>
+Maintainer: Ubuntu Developers <ubuntu-devel-discuss@lists.ubuntu.com>
+XSBC-Original-Maintainer: Debian Science Team <debian-science-maintainers@lists.alioth.debian.org>
 Uploaders: Anton Gladky <gladk@debian.org>
 Section: math
 Priority: optional
@@ -41,6 +42,9 @@
 Architecture: all
 Depends: gnuplot-qt | gnuplot-x11 | gnuplot-nox,
          ${misc:Depends}
+Provides: gnuplot5
+Breaks: gnuplot5 (<< 5.0.5+dfsg1-4~)
+Replaces: gnuplot5 (<< 5.0.5+dfsg1-4~)
 Suggests: gnuplot-doc
 Description: Command-line driven interactive plotting program.
  Gnuplot is a portable command-line driven interactive data and function
@@ -59,6 +63,8 @@
 Multi-Arch: foreign
 Section: doc
 Depends: ${misc:Depends}
+Breaks: gnuplot (<< 5.0.5+dfsg1-4~)
+Replaces: gnuplot (<< 5.0.5+dfsg1-4~)
 Description: Command-line driven interactive plotting program. Doc-package
  Gnuplot is a portable command-line driven interactive data and function
  plotting utility that supports lots of output formats, including drivers
@@ -80,9 +86,11 @@
 Suggests: gnuplot-doc
 Conflicts: gnuplot-qt,
            gnuplot-x11
-Provides: gnuplot
+Provides: gnuplot, gnuplot5-nox
 Replaces: gnuplot-qt,
-          gnuplot-x11
+          gnuplot-x11,
+          gnuplot5-nox (<< 5.0.5+dfsg1-4~)
+Breaks: gnuplot5-nox (<< 5.0.5+dfsg1-4~)
 Description: Command-line driven interactive plotting program. No-X package
  Gnuplot is a portable command-line driven interactive data and function
  plotting utility that supports lots of output formats, including drivers
@@ -104,9 +112,12 @@
 Conflicts: gnuplot-x11,
            gnuplot-nox
 Provides: gnuplot-nox,
-          gnuplot
+          gnuplot,
+          gnuplot5-qt
 Replaces: gnuplot-x11,
-          gnuplot-nox
+          gnuplot-nox,
+          gnuplot5-qt (<< 5.0.5+dfsg1-4~)
+Breaks: gnuplot5-qt (<< 5.0.5+dfsg1-4~)
 Description: Command-line driven interactive plotting program. QT-package
  Gnuplot is a portable command-line driven interactive data and function
  plotting utility that supports lots of output formats, including drivers
@@ -131,9 +142,12 @@
 Conflicts: gnuplot-qt,
            gnuplot-nox
 Provides: gnuplot-nox,
-          gnuplot
+          gnuplot,
+          gnuplot5-x11
 Replaces: gnuplot-qt,
-          gnuplot-nox
+          gnuplot-nox,
+          gnuplot5-x11 (<< 5.0.5+dfsg1-4~)
+Breaks: gnuplot5-x11 (<< 5.0.5+dfsg1-4~)
 Description: Command-line driven interactive plotting program. X-package
  Gnuplot is a portable command-line driven interactive data and function
  plotting utility that supports lots of output formats, including drivers
@@ -151,6 +165,10 @@
 Section: doc
 Depends: aglfn,
          ${misc:Depends}
+Breaks: gnuplot5-data,
+        gnuplot-tex (<< 4.6.6-4)
+Replaces: gnuplot5-data,
+          gnuplot-tex (<< 4.6.6-4)
 Description: Command-line driven interactive plotting program. Data-files
  Gnuplot is a portable command-line driven interactive data and function
  plotting utility that supports lots of output formats, including drivers