···

       
269
       
269
       
 
       
    # To enable user switching, allow sddm to allocate TTYs/displays dynamically.

     

       
270
       
270
       
 
       
    services.xserver.tty = null;

     

       
271
       
271
       
 
       
    services.xserver.display = null;

     

       
272
       
272
       
-
       


     

       
273
       
273
       
-
       
    systemd.tmpfiles.rules = [

     

       
274
       
274
       
-
       
      # Prior to Qt 5.9.2, there is a QML cache invalidation bug which sometimes

     

       
275
       
275
       
-
       
      # strikes new Plasma 5 releases. If the QML cache is not invalidated, SDDM

     

       
276
       
276
       
-
       
      # will segfault without explanation. We really tore our hair out for awhile

     

       
277
       
277
       
-
       
      # before finding the bug:

     

       
278
       
278
       
-
       
      # https://bugreports.qt.io/browse/QTBUG-62302

     

       
279
       
279
       
-
       
      # We work around the problem by deleting the QML cache before startup.

     

       
280
       
280
       
-
       
      # This was supposedly fixed in Qt 5.9.2 however it has been reported with

     

       
281
       
281
       
-
       
      # 5.10 and 5.11 as well. The initial workaround was to delete the directory

     

       
282
       
282
       
-
       
      # in the Xsetup script but that doesn't do anything.

     

       
283
       
283
       
-
       
      # Instead we use tmpfiles.d to ensure it gets wiped.

     

       
284
       
284
       
-
       
      # This causes a small but perceptible delay when SDDM starts.

     

       
285
       
285
       
-
       
      "e ${config.users.users.sddm.home}/.cache - - - 0"

     

       
286
       
286
       
-
       
    ];

     

       
287
       
272
       
 
       
  };

     

       
288
       
273
       
 
       
}