(In reply to Sebastian Wagner from comment #7) > This is the upstream bug report: > https://github.com/flatpak/flatpak/issues/4043 > > It runs down to the issue that, by default "localhost.localdomain" is the > hostname and openSUSE-specific behaviour in some xauth-related stuff causes > troubles with the dot. Really? AFAIK the issue is that: 1. openSUSE adjusts the hostname based on DHCP and reverse DNS (other distros by default don't) 2. To mitigate xauth related issues, libxcb is patched to handle $XAUTHLOCALHOSTNAME The issue is that flatpak applications don't use the system libxcb, and are thus affected by 1. I don't think there's any issue with the hostname format by itself. Without patching libxcb or mitigating the issue in another way (SDDM and GDM in TW use FamilyWild, which doesn't depend on hostnames), this can't be fixed completely because the hostname can still change dynamically. > Hostnames with dots cause that flatpaks based on KDE > won't run (sounds crazy, yes) > > According to > https://github.com/flatpak/flatpak/pull/4130/commits/ > fd6a3b79f4e022e3f41f0c71ab7c6f21393c0db1 there's a fix in flatpak's versions > 1.11.2 1.11.1 , but openSUSE Leaps' version is 1.10 AFAIK (both in 15.2 and > 15.3). > > Hope this helps.