Bug#571636: Keyboard not working in X after upgrade to 7.5

[Ariel Garcia <garcia@kit.edu>]

Package: xserver-xorg
Version: 1:7.5+3
Severity: grave
Justification: renders X unusable without extra configuration


After the following package upgrades, the keyboard stopped working in X, 
but still works fine in the console:
    xserver-common              2:1.6.5-1  -->  2:1.7.4-2
    xserver-xorg-core             2:1.6.5-1  -->  2:1.7.4-2
    xserver-xorg-input-evdev   1:2.2.5-1  -->  1:2.3.2-3
    xserver-xorg                      1:7.4+4   -->  1:7.5+3

(the problem still persists after updating to
    xserver-common		 2:1.7.5-1
    xserver-xorg-core		 2:1.7.5-1
)

The problem dissapears if instead of having an empty   xorg.conf file, 
I add the following "manual" configuration:

----------------------
Section "ServerLayout"
        Identifier      "L0"
        InputDevice     "k0"
EndSection

Section "InputDevice"
        Identifier      "k0"
        Driver          "evdev"
        Option          "Device"        "/dev/input/event4"
EndSection
----------------------

I guess the problem has to do with the change from hal to udev for 
discovering the input devices...


Arch: x86_64  , Kernel 2.6.32.8 #2 SMP PREEMPT ... x86_64 GNU/Linux

libc6 2.10.2-2
libc6-i386 2.10.2-2
libudev0 151-2
udev 151-2
libhal1 0.5.14-2
hal 0.5.14-2

Affected system is a Lenovo T400s laptop.