During Ubuntu 24.10 beta period it's corresponding release notes lacked
information about this new kdump mechanism enabled by default (release
notes kernel section was empty during all beta period). Now, once
published Ubuntu 24.10 final and reading it's corresponding final
release notes, IMO this bug can be closed as invalid. The release notes
stated that:
"Crash dumps are now enabled by default for desktop and server
installations. Please refer to the Ubuntu Server Kernel crash dump
documentation for complete details."
Reading the Ubuntu Server Kernel crash dump documentation you can see
that:
"KDump enabled by default
Starting in Oracular Oriole (24.10) the kernel crash dump facility will
be enabled by default during standard Ubuntu Desktop or Ubuntu Server
installations on systems that meet the following requirements:
the system has at least 4 CPU threads
the system has at least 6GB of RAM, and less than 2TB of RAM
the free space available in /var is more than 5 times the amount of
RAM and swap space
and the CPU architecture is
amd64 or s390x, or
arm64 and UEFI is used"
The Raspberry Pi 4 doesn't meet the last requirement as no UEFI is used
in the default Ubuntu desktop installation.
So, this new kdump mechanism is useless for the Raspberry Pi 4 despite
the fact that it's enabled by default (file /etc/default/kdump-tools
with USE_KDUMP=1). As, in this situation, the kdump service just doesn't
start, being enabled but not working is harmless.
Sorry for the inconveniences.
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https://bugs.launchpad.net/bugs/2081746
Title:
Ubuntu 24.10 Beta, Raspberry Pi 4: kdump-tools service not started,
with errors
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