20.04 failed to calculate upgrade issue

[andrew]

Calculating the changes

Could not calculate the upgrade

An unresolvable problem occurred while calculating the upgrade.

This was likely caused by:
* Unofficial software packages not provided by Ubuntu
Please use the tool 'ppa-purge' from the ppa-purge
package to remove software from a Launchpad PPA and
try the upgrade again.

If none of this applies, then please report this bug using the
command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal. If
you want to investigate this yourself the log files in
'/var/log/dist-upgrade' will contain details about the upgrade.
Specifically, look at 'main.log' and 'apt.log'.

-----
apt.log
2236 Broken sane-utils:amd64 Depends on libsane:amd64 < none | 1.0.29-0ubuntu5 @un umH > (>= 1.0.27)
2237 Considering libsane:amd64 15 as a solution to sane-utils:amd64 10
2238 MarkKeep sane-utils:amd64 < 1.0.27-1~experimental3ubuntu2.2 -> 1.0.29-0ubuntu5 @ii umU Ib > FU=0
2239 Removing sane-utils:amd64 rather than change libsane:amd64
2240 MarkDelete sane-utils:amd64 < 1.0.27-1~experimental3ubuntu2.2 | 1.0.29-0ubuntu5 @ii umH Ib > FU=0
2241 Investigating (8) libhpmud0:amd64 < 3.17.10+repack0-5 -> 3.20.3+dfsg0-2 @ii umU Ib >
2242 Broken libhpmud0:amd64 Depends on libsnmp35:amd64 < none | 5.8+dfsg-2ubuntu2 @un umH > (>= 5.8+dfsg)
2243 Considering libsnmp35:amd64 7 as a solution to libhpmud0:amd64 8
2244 MarkKeep libhpmud0:amd64 < 3.17.10+repack0-5 -> 3.20.3+dfsg0-2 @ii umU Ib > FU=0
2245 Reinst Failed because of libsnmp35:amd64
2246 MarkKeep libhpmud0:amd64 < 3.17.10+repack0-5 -> 3.20.3+dfsg0-2 @ii umU Ib > FU=0
2247 Removing libhpmud0:amd64 rather than change libsnmp35:amd64
2248 MarkDelete libhpmud0:amd64 < 3.17.10+repack0-5 | 3.20.3+dfsg0-2 @ii umH Ib > FU=0
2249 Investigating (8) printer-driver-hpcups:amd64 < 3.17.10+repack0-5 -> 3.20.3+dfsg0-2 @ii umU Ib >
2250 Broken printer-driver-hpcups:amd64 Depends on libhpmud0:amd64 < 3.17.10+repack0-5 | 3.20.3+dfsg0-2 @ii umR > (>= 3.20.3+dfsg0)
2251 Considering libhpmud0:amd64 8 as a solution to printer-driver-hpcups:amd64 4
2252 MarkKeep printer-driver-hpcups:amd64 < 3.17.10+repack0-5 -> 3.20.3+dfsg0-2 @ii umU Ib > FU=0
2253 Reinst Failed because of libhpmud0:amd64
2254 MarkKeep printer-driver-hpcups:amd64 < 3.17.10+repack0-5 -> 3.20.3+dfsg0-2 @ii umU Ib > FU=0
2255 Removing printer-driver-hpcups:amd64 rather than change libhpmud0:amd64
2256 MarkDelete printer-driver-hpcups:amd64 < 3.17.10+repack0-5 | 3.20.3+dfsg0-2 @ii umH Ib > FU=0
2257 Investigating (8) libsane-hpaio:amd64 < 3.17.10+repack0-5 -> 3.20.3+dfsg0-2 @ii umU Ib >
2258 Broken libsane-hpaio:amd64 Depends on libhpmud0:amd64 < 3.17.10+repack0-5 | 3.20.3+dfsg0-2 @ii umR > (>= 3.20.3+dfsg0)
2259 Considering libhpmud0:amd64 8 as a solution to libsane-hpaio:amd64 4
2260 MarkKeep libsane-hpaio:amd64 < 3.17.10+repack0-5 -> 3.20.3+dfsg0-2 @ii umU Ib > FU=0
2261 Reinst Failed because of libhpmud0:amd64
2262 MarkKeep libsane-hpaio:amd64 < 3.17.10+repack0-5 -> 3.20.3+dfsg0-2 @ii umU Ib > FU=0
2263 Removing libsane-hpaio:amd64 rather than change libhpmud0:amd64
2264 MarkDelete libsane-hpaio:amd64 < 3.17.10+repack0-5 | 3.20.3+dfsg0-2 @ii umH Ib > FU=0
2265 Investigating (8) hplip:amd64 < 3.17.10+repack0-5 -> 3.20.3+dfsg0-2 @ii umU Ib >
2266 Broken hplip:amd64 Depends on libhpmud0:amd64 < 3.17.10+repack0-5 | 3.20.3+dfsg0-2 @ii umR > (= 3.20.3+dfsg0-2)
2267 Considering libhpmud0:amd64 8 as a solution to hplip:amd64 4
2268 MarkKeep hplip:amd64 < 3.17.10+repack0-5 -> 3.20.3+dfsg0-2 @ii umU Ib > FU=0
2269 Reinst Failed because of libhpmud0:amd64
2270 MarkKeep hplip:amd64 < 3.17.10+repack0-5 -> 3.20.3+dfsg0-2 @ii umU Ib > FU=0
2271 Removing hplip:amd64 rather than change libhpmud0:amd64
2272 MarkDelete hplip:amd64 < 3.17.10+repack0-5 | 3.20.3+dfsg0-2 @ii umH Ib > FU=0
2273 Investigating (8) simple-scan:amd64 < 3.28.0-0ubuntu1 -> 3.36.0-0ubuntu1 @ii umU Ib >
2274 Broken simple-scan:amd64 Depends on libsane:amd64 < none | 1.0.29-0ubuntu5 @un umH > (>= 1.0.24)
2275 Considering libsane:amd64 15 as a solution to simple-scan:amd64 1
2276 MarkKeep simple-scan:amd64 < 3.28.0-0ubuntu1 -> 3.36.0-0ubuntu1 @ii umU Ib > FU=0
2277 Reinst Failed because of libsane:amd64
2278 MarkKeep simple-scan:amd64 < 3.28.0-0ubuntu1 -> 3.36.0-0ubuntu1 @ii umU Ib > FU=0
2279 Removing simple-scan:amd64 rather than change libsane:amd64
2280 MarkDelete simple-scan:amd64 < 3.28.0-0ubuntu1 | 3.36.0-0ubuntu1 @ii umH Ib > FU=0
2281 Investigating (9) colord:amd64 < 1.3.3-2build1 -> 1.4.4-2 @ii umU Ib >
2282 Broken colord:amd64 Depends on libsane:amd64 < none | 1.0.29-0ubuntu5 @un umH > (>= 1.0.24)
2283 Considering libsane:amd64 15 as a solution to colord:amd64 37
2284 Added libsane:amd64 to the remove list
2285 Fixing colord:amd64 via keep of libsane:amd64
2286 Done
2287 Log time: 2020-04-26 11:37:51.604831

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubuntu-release-upgrader-core 1:18.04.37
ProcVersionSignature: Ubuntu 5.3.0-45.37~18.04.1-generic 5.3.18
Uname: Linux 5.3.0-45-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.14
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Sun Apr 26 11:38:21 2020
InstallationDate: Installed on 2019-11-28 (149 days ago)
InstallationMedia: Ubuntu 18.04.3 LTS "Bionic Beaver" - Release amd64 (20190805)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to bionic on 2020-04-25 (0 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Brian Murray (brian-murray)]

Reviewing the files from your upgrade attempt you seem to have enabled a PPA that provides Xorg packages. This will prevent the upgrade as that PPA contains package version numbers greater than the release to which you are upgrading. You can revert the PPA by installing the ppa-purge package from the official Ubuntu archive and then running 'sudo ppa-purge ppa:oibaf/graphics-drivers'. After that you can try upgrading again and if it still fails open a new bug report. Thanks and good luck!