After lots of investigation, I discovered that the boundary between system and user accounts is hard coded in gdm, and patched from 500 to 1000 by Ubuntu. I was able to rebuild the package. I'll post further on https://bugs.launchpad.net/bugs/459199
After lots of investigation, I discovered that the boundary between system and user accounts is hard coded in gdm, and patched from 500 to 1000 by Ubuntu. I was able to rebuild the package. I'll post further on https:/ /bugs.launchpad .net/bugs/ 459199