"I suspect this is due to something being terribly wrong with apt's phased updates."
Yes, the issue seems to be caused by some kept back packages yesterday:
The following packages have been kept back:
base-files language-pack-de language-pack-de-base language-pack-gnome-de language-pack-gnome-de-base
language-pack-gnome-en language-pack-gnome-en-base libegl-mesa0 libgbm1 libgbm1:i386 libgl1-amber-dri
libgl1-mesa-dri libglapi-mesa libglapi-mesa:i386 libglx-mesa0 libosmesa6:i386 python3-distupgrade
ubuntu-release-upgrader-core ubuntu-release-upgrader-gtk
Today it's working ok on my system:
$ sudo apt full-upgrade
The following NEW packages will be installed
libdrm-intel1:i386 libpciaccess0:i386
The following packages will be upgraded:
base-files language-pack-de language-pack-de-base language-pack-gnome-de language-pack-gnome-de-base
language-pack-gnome-en language-pack-gnome-en-base libegl-mesa0 libgbm1 libgbm1:i386 libgl1-amber-dri
libgl1-mesa-dri libgl1-mesa-dri:i386 libglapi-mesa libglapi-mesa:i386 libglx-mesa0 libglx-mesa0:i386 libosmesa6
libosmesa6:i386 python3-distupgrade ubuntu-release-upgrader-core ubuntu-release-upgrader-gtk
22 to upgrade, 2 to newly install, 0 to remove and 0 not to upgrade.
"I suspect this is due to something being terribly wrong with apt's phased updates."
Yes, the issue seems to be caused by some kept back packages yesterday: pack-de- base language- pack-gnome- de language- pack-gnome- de-base pack-gnome- en language- pack-gnome- en-base libegl-mesa0 libgbm1 libgbm1:i386 libgl1-amber-dri release- upgrader- core ubuntu- release- upgrader- gtk
The following packages have been kept back:
base-files language-pack-de language-
language-
libgl1-mesa-dri libglapi-mesa libglapi-mesa:i386 libglx-mesa0 libosmesa6:i386 python3-distupgrade
ubuntu-
Today it's working ok on my system: intel1: i386 libpciaccess0:i386 pack-de- base language- pack-gnome- de language- pack-gnome- de-base pack-gnome- en language- pack-gnome- en-base libegl-mesa0 libgbm1 libgbm1:i386 libgl1-amber-dri mesa-dri: i386 libglapi-mesa libglapi-mesa:i386 libglx-mesa0 libglx-mesa0:i386 libosmesa6 release- upgrader- core ubuntu- release- upgrader- gtk
$ sudo apt full-upgrade
The following NEW packages will be installed
libdrm-
The following packages will be upgraded:
base-files language-pack-de language-
language-
libgl1-mesa-dri libgl1-
libosmesa6:i386 python3-distupgrade ubuntu-
22 to upgrade, 2 to newly install, 0 to remove and 0 not to upgrade.