Once again an 'apt upgrade' has stalled on my 1Gb Pi 4.  Here's where
it stops after a standard 'apt update' and 'apt upgrade' :-

    ...
    ...
    ...
    Unpacking apt-utils (1.8.2.2) over
    (1.8.2.1) ...
    Preparing to unpack .../1-libssl1.1_1.1.1d-0+deb10u4+rpt1_armhf.deb ...
    Unpacking libssl1.1:armhf (1.1.1d-0+deb10u4+rpt1) over
    (1.1.1d-0+deb10u3+rpt1) ...
    Preparing to unpack .../2-openssl_1.1.1d-0+deb10u4+rpt1_armhf.deb ...
    Unpacking openssl (1.1.1d-0+deb10u4+rpt1) over (1.1.1d-0+deb10u3+rpt1) ...
    Preparing to unpack .../3-python-apt-common_1.8.4.2_all.deb ...
    Unpacking python-apt-common (1.8.4.2) over (1.8.4.1) ...
    Preparing to unpack .../4-python3-apt_1.8.4.2_armhf.deb ...
    Unpacking python3-apt (1.8.4.2) over (1.8.4.1) ...
    Preparing to unpack .../5-rpi-eeprom_11.0-1_armhf.deb ...
    Unpacking rpi-eeprom (11.0-1) over (10.3-1) ...
    Setting up libssl1.1:armhf (1.1.1d-0+deb10u4+rpt1) ...
    Setting up systemd (241-7~deb10u5+rpi1) ...
    Setting up libapt-inst2.0:armhf (1.8.2.2) ...
    Setting up udev (241-7~deb10u5+rpi1) ...
    update-initramfs: deferring update (trigger activated)
    Setting up python-apt-common (1.8.4.2) ...
    Setting up rpi-eeprom (11.0-1) ...

The system is still running as I can still ssh into it from another
terminal window (it's a headless system on my LAN).  After rebooting
and a long wait for it to run disk checks etc. the system came back OK
and had actually finished the upgrade.

This is a pretty standard Raspios Buster Lite installation with few
additions, it's an old Pi 4 with only 1Gb of memory and has a big,
external USB disk drive which powers down when idle.  The USB disk has
its own power supply, the Pi 4 is powered by an 'official' Pi 4 PSU.

Does anyone have any suggestions as to what might be causing this
and/or ways to diagnose what's happening?

--
Chris Green
·

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