So "-pu" is the "proposed updates" . I learn every day something.
Regarding the proposed updates: * I found it in the upgrade manual <https://www.debian.org/releases/bookworm/amd64/release-notes/ch-upgrading.e n.html#proposed-updates> : 4.2.9. The proposed-updates section If you have listed the proposed-updates section in your APT source-list files, you should remove it before attempting to upgrade your system. This is a precaution to reduce the likelihood of conflicts. * I checked one another manual which led me to this link: https://release.debian.org/proposed-updates/stable.html qemu is not listed there. * changed the apt source line to "bookworm-proposed-updates main contrib non-free non-free-firmware", ran "apt update", then "apt-cache madison qemu-system-x86". Got this: qemu-system-x86 | 1:7.2+dfsg-7 | http://ftp.hu.debian.org/debian stable/main amd64 Packages qemu-system-x86 | 1:7.2+dfsg-7 | http://ftp.br.debian.org/debian stable/main amd64 Packages qemu-system-x86 | 1:7.2+dfsg-7~bpo11+1 | http://ftp.debian.org/debian bullseye-backports/main amd64 Packages qemu-system-x86 | 1:5.2+dfsg-11+deb11u2 | http://ftp.hu.debian.org/debian bullseye/main amd64 Packages qemu-system-x86 | 1:5.2+dfsg-11+deb11u2 | https://deb.debian.org/debian-security bullseye-security/main amd64 Packages qemu-system-x86 | 1:5.2+dfsg-11+deb11u2 | http://deb.debian.org/debian bullseye/main amd64 Packages qemu-system-x86 | 1:5.2+dfsg-9~bpo10+1 | http://ftp.debian.org/debian buster-backports/main amd64 Packages Did I miss something?
