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It's a dull and boring day, it's cold outside and I'm stuck at home: let me tell you the story of systemd-vconsole-setup. In the beginnings of NixOS[1], systemd-vconsole-setup was a powerful sysinit.target unit, installed and running at boot to set up fonts keyboard layouts and even colors of the virtual consoles. If needed, the service would also be restarted after a configuration change, consoles were happy and everything was good, well, almost. Since the service had no way to specify the dependency "ttys are ready", modesetting could sometimes happen *after* systemd-vconsole-setup had started, leaving the console in a broken state. So abbradar worked around that by putting a systemd-udev-settle `After=`. In the meanwhile, probably realizing their mistake, systemd added a shiny udev rule to start the systemd-udev-settle at the right time[2]. However, the rule bypassed systemd by directly running the binary `systemd-udev-settle`, and the service - though still installed - fell into disuse. Two years would pass before a good samaritan, seeing the poor jobless systemd-udev-settle service, decided to give it the coup de grâs[3] by unlisting it from the installed units. This, combined with another bug, caused quite a commotion[4] in NixOS; to see why remember the fact that `WantedBy=` in upstream units doesn't work[5], so it had to be added manually in |
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| config | ||
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| i18n/input-method | ||
| installer | ||
| misc | ||
| profiles | ||
| programs | ||
| security | ||
| services | ||
| system | ||
| tasks | ||
| testing | ||
| virtualisation | ||
| module-list.nix | ||
| rename.nix | ||