[Bug 1876586] Re: Package dependencies cannot be resolved

[teo1978]

$ sudo apt -f install
[sudo] password for teo: 
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages were automatically installed and are no longer required:
  bogofilter bogofilter-bdb bogofilter-common evolution-common fonts-horai-umefont fonts-unfonts-core geoip-database-extra gtk2-engines-pixbuf
  libchamplain-gtk-0.12-0 libcryptui0a libcurl3-gnutls:i386 libevolution libgif7:i386 libicu63 libjs-openlayers libllvm4.0 libllvm4.0:i386 libllvm5.0
  libllvm5.0:i386 libmuparser2v5 libp11-kit-gnome-keyring:i386 libpst4 libqmi-glib1 libqpdf17 librecad-data librtmp1:i386 libsodium18 libvpx3:i386
  libwireshark8 libwiretap6 libwscodecs1 libwsutil7 libytnef0 libzip5 linux-headers-4.4.0-171 linux-headers-4.4.0-171-generic linux-image-4.4.0-171-generic
  linux-modules-4.4.0-171-generic linux-modules-extra-4.4.0-171-generic ocl-icd-libopencl1:i386 odbcinst odbcinst1debian2 openshot-doc p7zip python-mlt
  python-pygoocanvas seahorse-daemon snapd-login-service unixodbc wine-gecko2.21 wine-gecko2.21:i386 wine-mono0.0.8 winetricks
Use 'sudo apt autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 13 not upgraded.


Note that this is after the error went away as per comment 2

** Changed in: update-manager (Ubuntu)
       Status: Incomplete => New

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https://bugs.launchpad.net/bugs/1876586

Title:
  Package dependencies cannot be resolved

Status in update-manager package in Ubuntu:
  New

Bug description:
  Every once in a while, the Software Updater window pops up as expected
  letting me know that there are updates ready to download and install.

  Lately I have been clicking on "remind me later" every time for
  several weeks and only today I have finally clicked on "install now"
  (or "update now" or whatever the button is called).

  I don't know whether that's relevant: had I installed the updates
  before rather than delaying them for many days, would I have got the
  same error? I don't know. Either way, that shouldn't be a problem.

  Now that I did, I got this error (see attached screenshot).

  First of all, if I get a "dependencies cannot be resolved" error,
  whatever it means, there's a bug somewhere. You are the package
  manager, it's your job to resolve and install dependencies. I have
  done nothing to prevent you from doing so, so if you can't resolve and
  install all the needed dependencies, something is wrong somewhere.

  Secondly, the error message doesn't tell me anything that I can act
  upon. What am I supposed to do? It's great that you give me
  information about the error but it's not enough if you don't give me
  something I can act upon. Tell me what I shoul do.

  Thirdly, let's have a look at the specific errors that are listed in
  this instance.

  
  >>>    "libxml2: Depends: libicus65 (>=2.15) but 2.23-Oubuntu11 is to be installed"

  First of all, this is unclear af. "IS TO BE" is the part that confuses
  me. But I assume it means "is ABOUT" or "is GOING" to be installed.
  So, ok.

  So, a version greater than or equal to 2.15 of that package is required, "BUT" version 2.23-something is going to be installed... "instead", I guess.
  Well, it seems to me like 2.23 **IS** greater than or equal to 2.15, so what  the fuck are you complaining about in the first place.

  And then if it were true that that version is not compatible with your
  requirements, then why is that? What is preventing you from installing
  the version you need? I'm not saying there isn't a good reason, I'm
  saying the whole point of the error message is to tell me what the
  fuck the problem is and you are not giving me that information.

  But the bigger point here is that what I'm reading seems to say  that
  your problem is that you need a version of a package that is >=2.15
  and 2.23 doesn't satisfy that requirement, which is absolute nonsense.

  
  And every single error in the list is like that:

     "X: depends: Y (>=N) but M is to be installed"

  with M > N.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: update-manager 1:16.04.17
  ProcVersionSignature: Ubuntu 4.4.0-173.203-generic 4.4.208
  Uname: Linux 4.4.0-173-generic x86_64
  NonfreeKernelModules: nvidia_uvm nvidia
  ApportVersion: 2.20.1-0ubuntu2.21
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Sun May  3 15:53:56 2020
  DpkgHistoryLog.txt:
   
  DpkgTerminalLog.txt:
   
  InstallationDate: Installed on 2013-10-11 (2395 days ago)
  InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
  PackageArchitecture: all
  SourcePackage: update-manager
  UpgradeStatus: No upgrade log present (probably fresh install)

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