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-This config is for [Librem 13v3](https://puri.sm/products/librem-13/) and [15v3](https://puri.sm/products/librem-15/) Laptops from Purism.
-
-
-Librem comes with Coreboot + SeaBIOS payload. That means EFI boot is not
-possible. Use `fdisk` to partition hard drive, and GRUB as a bootloader:
-
-```nix
-{
-  boot.loader.grub = {
-    enable = true;
-    device = "/dev/sda";
-    version = 2;
-  };
-}
-```
-
-## Adding a PureOS partition to the GRUB menu
-
-I first assume that `boot.loader.grub.useOSProber = true;` should be sufficient.
-However GRUB was not able to identify the disks correctly and it took me several
-reinstallation till setting `boot.loader.grub.fsIdentifier= "provided";` and using
-boot.loader.grub.extraEntries allowed me to dual boot NixOS and PureOS.
-
-Be aware that each time the PureOS updates the /boot/grub/grub.cfg you will be unable
-to boot into NixOS unless you patch grub.cfg manually again.
-
-Therefore: If you want to be able to boot into your old PureOS distribution
-add the following lines, assuming that you have a separate boot partition
-Adapt linux version and the UUID to your disk!!
-
-
-```nix
-{
-  boot.loader.grub.useOSProber = false;
-  boot.loader.grub.fsIdentifier= "provided";
-  boot.loader.grub.extraEntries = ''
-  menuentry "PureOS with linux 4.19.0-5-amd64 on /dev/sdb2 " {
-      insmod gzio
-      if [ x$grub_platform = xxen ]; then insmod xzio; insmod lzopio; fi
-      insmod part_msdos
-      insmod ext2
-      set root='hd0,msdos1'
-      if [ x$feature_platform_search_hint = xy ]; then
-        search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos1 --hint-efi=hd0,msdos1 --hint-baremetal=ahci0,msdos1  ef7a4dcf-8cc4-4870-b860-3ed64906f9b9
-      else
-        search --no-floppy --fs-uuid --set=root ef7a4dcf-8cc4-4870-b860-3ed64906f9b9
-      fi
-      linux   /vmlinuz-4.19.0-5-amd64 root=UUID=43899f26-04f2-4ccb-b52a-c9441f1a1a6d ro  quiet splash resume=UUID=923317f8-d8bb-4e1f-bca3-f36a556de609 # $vt_handoff
-      initrd  /initrd.img-4.19.0-5-amd64
-  };
-}
-```
-
-## Automatically lock the desktop when removing the librem key
-
-The [instructions](https://docs.puri.sm/Librem_Key/Getting_Started/User_Manual.html#automatically-lock-the-desktop-when-removing-the-librem-key) to lock the screen after unplugging the [Librem Key](https://puri.sm/products/librem-key/#overview) don't work under NixOS.
-
-This snippet works on my Librem 15v3 laptop running KDE without wayland and is using the xlock from the package xlockmore.
-
-```nix
-{ pkgs, services , systemd, ... }:
-let
-  libremScreenSaver = pkgs.writeScriptBin "libremScreenSaver" ''
-  #!${pkgs.bash}/bin/bash
-  user=`ps aux | egrep "start_kdeinit|gdm-(wayland|x)-session"| head -n 1 | awk '{print $1}'`
-  if [ -n "$user" ]; then
-    sudo -u $user DISPLAY=:0 xlock 2>&1 | logger lockScreen for user $user
-  else
-    logger libremScreenSaver failed to find a user. Not running KDE?
-  fi
-  '';
-
-in {
-  services.udev.path = [ pkgs.procps pkgs.logger pkgs.gawk pkgs.xlockmore ];
-  services.udev.extraRules = ''
-    ACTION=="remove", ENV{PRODUCT}=="316d/4c4b/101" RUN+="${pkgs.systemd}/bin/systemctl --no-block start lockScreen@%k.service"
-  '';
-  systemd.services."lockScreen@" = {
-    bindsTo = [ "dev-%i.device"] ;
-    path = [ pkgs.procps pkgs.logger pkgs.sudo pkgs.xlockmore pkgs.gawk ] ;
-    serviceConfig = {
-        Type = "oneshot"; # was simple
-        ExecStart = "${libremScreenSaver}/bin/libremScreenSaver %I";
-    };
-  };
-}
-```