Overview: 
Core keyboard is initialized by using rule "base", model "pc105", layout "us", (dix/devices.h:529). This doesn't work with evdev. With evdev it should be "evdev", "evdev", "us".

On an Acer Aspire One running latest xorg-server (1.5.99.3) without a configure file. After startup the virtual core keyboard is using "xfree86" keycodes, while the AT keyboard is using "evdev" keycodes. This is wrong. Many control keys doesn't work out-of-the-box. Most annoying is that arrow keys doesn't work.

Worthnoting that this problem is concealed for a long time since if you are using a DM that set the keyboard layout on startup, like most GNOME/KDE. The DM would likely set all keyboards layout to the one it prefer thus overwrite the wrong default one for core keyboards.

I'm not using a heavy DM and was hit by this problem. I spend much time to study it and hope this is the root cause.

Steps to Reproduce: 
1. install latest xorg-server (1.5.99.3 here)
2. make sure you don't have a config file
3. start X, don't load a desktop manager since the DM will very likely set the layout by itself and conceal this problem
4. the arrow keys doens't work

run `xkbcomp :0.0 /tmp/xkb.out'. check the output and you'll see that xkb_keycodes is "xfree86+..." and this is wrong for an evdev keyboard.

Actual Results: 
Arrow keys don't work out-of-the-box.

Expected Results:
All keys should work correctly.

Build Date & Platform:
xorg-server 1.5.99.3
evdev 2.1.0