kernel-config: Enable FB_VESA and FRAMEBUFFER_CONSOLE

Commit 159fed47bc (nixos/grub: Fix video display on efi) changed BIOS
systems to start in non-text mode as well. Enable FB_VESA to get a
framebuffer console on BIOS systems. Change FRAMEBUFFER_CONSOLE to 'y'
instead of the default 'm' to so the user doesn't need to manually load
the fbcon module anymore.

Other distros have similar defaults, at least on Arch:
    CONFIG_FB_VESA=y
    CONFIG_FRAMEBUFFER_CONSOLE=y
and on Ubuntu (12.04):
    CONFIG_FB_VESA=m
    CONFIG_FRAMEBUFFER_CONSOLE=y

Fixes #8139

nixos/doc/manual/installation/installing-uefi.xml

@@ -41,10 +41,6 @@ changes:
     <option>boot.loader.efi</option> and <option>boot.loader.gummiboot</option>
     as well.</para>
   </listitem>
-  <listitem>
-    <para>To see console messages during early boot, add <literal>"fbcon"</literal>
-    to your <option>boot.initrd.kernelModules</option>.</para>
-  </listitem>
 </itemizedlist>
 </para>
 

nixos/modules/installer/cd-dvd/installation-cd-base.nix

@@ -42,9 +42,6 @@ with lib;
   # Add Memtest86+ to the CD.
   boot.loader.grub.memtest86.enable = true;
 
-  # Get a console as soon as the initrd loads fbcon on EFI boot.
-  boot.initrd.kernelModules = [ "fbcon" ];
-
   # Allow the user to log in as root without a password.
   users.extraUsers.root.initialHashedPassword = "";
 }

pkgs/os-specific/linux/kernel/common-config.nix

@@ -131,6 +131,8 @@ with stdenv.lib;
   FB_SIS_300 y
   FB_SIS_315 y
   FB_3DFX_ACCEL y
+  FB_VESA y
+  FRAMEBUFFER_CONSOLE y
   ${optionalString (versionOlder version "3.9" || stdenv.system == "i686-linux") ''
     FB_GEODE y
   ''}