I have several Ubuntu X86-64 LTS machines that I maintain. All were 22.04 current. I migrated one to 22.04 (actually, 22.04.1 after the upgrade release was made available), and Software Updater displayed that the upgrade was available. On the second machine that in terms of OS and sysadmin is identical (different end-user applications, none systems), despite having an up-to-date 22.04, the upgrade to 24.04 was not offered. I had to use a terminal CLI to invoke the manual commands and the machine is downloading the full files (in a terminal, not GUI, window). Environment is stock 22.04 (to stock 24.04) under MATE as the end-user GUI -- but not MATE Ubuntu Linux. All of the settings in Software Updater were the same, including notification of the availability to upgrade to the next LTS release. But, that upgrade was never offered on the second machine. Any idea why?
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