Seems you are right. ports.ubuntu.com....noble-updates was disabled, I don't know why...sorry.
I just installed 438MB additional updates, rebooted, no problem any more. apt-cache policy libgl1-mesa-dri [sudo] Passwort für matthias: libgl1-mesa-dri: Installiert: 24.2.8-1ubuntu1~24.04.1 Installationskandidat: 24.2.8-1ubuntu1~24.04.1 Versionstabelle: *** 24.2.8-1ubuntu1~24.04.1 500 500 http://ports.ubuntu.com/ubuntu-ports noble-updates/main arm64 Packages 100 /var/lib/dpkg/status 24.0.5-1ubuntu1 500 500 http://ports.ubuntu.com/ubuntu-ports noble/main arm64 Packages -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to mesa in Ubuntu. https://bugs.launchpad.net/bugs/2092530 Title: Xwayland crash after libgl1-mesa-dri update on arm64 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mesa/+bug/2092530/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp