*** This bug is a duplicate of bug 1865959 ***
https://bugs.launchpad.net/bugs/1865959
I tried updating another vm I have locally and did hit the issue this
time. Starting from the update-initramfs process I followed the chain of
child processes, which leads to a process running /usr/share/initramfs-
tools/hooks/plymouth with two children, grep and sed. It looks to
indicate this section from that file:
THEME_PATH="$(update-alternatives --query default.plymouth 2>/dev/null | sed
-e '/^Value:/!d' -e 's/^Value: \(.*\)/\1/')"
IMAGE_PATH=$(grep "ImageDir *= *" ${THEME_PATH} | sed 's/ImageDir *= *//')
The stdin fd for grep is /dev/pts/1, which seems to indicate that
$THEME_PATH is empty and grep is therefore trying to read from the
terminal.
$ update-alternatives --query default.plymouth 2>/dev/null | sed -e
'/^Value:/!d' -e 's/^Value: \(.*\)/\1/'
This produces no output, which seems to confirm that $THEME_PATH will
end up empty.
Adding plymouth.
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https://bugs.launchpad.net/bugs/1866030
Title:
Unable to install focal 5.4.0-17 proposed kernel, hang with update-
initramfs
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