All defaults so it was standard install. did not do anything more, booted
without interacting with IPL.
Then this is extremely strange and unexpected. There must be a hppa-specific
hack in
one of the installer components which breaks this.
At which step are you seeing the error message regarding Buster? Does it install
the base system? Does it show up after asking for the mirror to install extra
components?
It happens during "Download installer components", before detecting the disks
etc.
The keyrings files:
# find / -name '*gpg*'
You should look under /target, not in the installer's chroot.
There is no /target yet.
What keyring should contain the debian-ports key and how should it get to the
installer image?
The proper keyring is "debian-ports-archive-keyring".
This package contains the followwing keyring files:
/usr/share/keyrings/debian-ports-archive-keyring-removed.gpg
/usr/share/keyrings/debian-ports-archive-keyring.gpg
They seem to be missing from the installer initramfs:
~ # ls -l /usr/share/keyrings/
lrwxrwxrwx 1 root root 26 Apr 12 13:16 archive.gpg ->
debian-archive-keyring.gpg
-rw-r--r-- 1 root root 5106 Oct 28 17:22
debian-archive-jessie-automatic.gpg
-rw-r--r-- 1 root root 5115 Oct 28 17:22
debian-archive-jessie-security-automatic.gpg
-rw-r--r-- 1 root root 2763 Oct 28 17:22
debian-archive-jessie-stable.gpg
-rw-r--r-- 1 root root 30142 Oct 28 17:22
debian-archive-keyring.gpg
-rw-r--r-- 1 root root 7443 Oct 28 17:22
debian-archive-stretch-automatic.gpg
-rw-r--r-- 1 root root 7452 Oct 28 17:22
debian-archive-stretch-security-automatic.gpg
-rw-r--r-- 1 root root 2263 Oct 28 17:22
debian-archive-stretch-stable.gpg
--
Meelis Roos