display-manager: Require systemd-udev-settle.service

It was already ordered after systemd-udev-settle.service, but that doesn't do anything if no other units require systemd-udev-settle.service. This was causing random failures during X server startup, e.g. machine# [ 12.691372] display-manager[607]: (EE) open /dev/dri/card0: No such file or directory http://hydra.nixos.org/build/41062823 (cherry picked from commit e6bcff4)
NixOS · Oct 20, 2016 · 2eac61e · 2eac61e · grahamc · Oct 20, 2016
1 parent 0b20f6d
commit 2eac61e
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/nixos/modules/services/x11/xserver.nix b/nixos/modules/services/x11/xserver.nix
@@ -504,6 +504,7 @@ in
       { description = "X11 Server";
 
         after = [ "systemd-udev-settle.service" "local-fs.target" "acpid.service" "systemd-logind.service" ];
+        wants = [ "systemd-udev-settle.service" ];
 
         restartIfChanged = false;