I have an IBM ThinkPad running Linux 2.6.18. To switch the NumLock state on the
internal keyboard, I have to press the Shift + ScrollLock keys. On the console,
this works fine, but in X I get the following events from xev:

---SNIP---
KeyPress event, serial 30, synthetic NO, window 0x1400001,
    root 0x4c, subw 0x1400002, time 3749488372, (56,62), root:(960,578),
    state 0x0, keycode 50 (keysym 0xffe1, Shift_L), same_screen YES,
    XLookupString gives 0 bytes: 
    XmbLookupString gives 0 bytes: 
    XFilterEvent returns: False

KeyPress event, serial 30, synthetic NO, window 0x1400001,
    root 0x4c, subw 0x1400002, time 3749488919, (56,62), root:(960,578),
    state 0x1, keycode 77 (keysym 0xfef9, Pointer_EnableKeys), same_screen YES,
    XLookupString gives 0 bytes: 
    XmbLookupString gives 0 bytes: 
    XFilterEvent returns: False

KeyRelease event, serial 30, synthetic NO, window 0x1400001,
    root 0x4c, subw 0x1400002, time 3749489054, (56,62), root:(960,578),
    state 0x1, keycode 77 (keysym 0xfef9, Pointer_EnableKeys), same_screen YES,
    XLookupString gives 0 bytes: 

KeyRelease event, serial 30, synthetic NO, window 0x1400001,
    root 0x4c, subw 0x1400002, time 3749489430, (56,62), root:(960,578),
    state 0x1, keycode 50 (keysym 0xffe1, Shift_L), same_screen YES,
    XLookupString gives 0 bytes: 
---SNIP---

That results in neither the internal keypad (alternate Symbols on some keys) nor
my USB keyboard's keypad generating any more keypad events, but mouse events
instead.

Is there a way to make this key combination work as it does on the console?

I am using the xf86-input-evdev driver version 1.1.2 (Debian version 1.1.2-2)
with the following xorg.conf directives:

Section "InputDevice"
        Identifier      "Thinkpad Keyboard"
        Driver          "evdev"
        Option          "CoreKeyboard"
        Option          "Name"                  "AT Translated Set 2 keyboard"
        Option          "XkbRules"              "xorg"
        Option          "XkbModel"              "evdev"
        Option          "XkbLayout"             "de"
        Option          "XkbVariant"            "nodeadkeys"
EndSection

Section "InputDevice"
        Identifier      "USB Keyboard"
        Driver          "evdev"
        Option          "SendCoreEvents"        "on"
        Option          "Name"                  "HID 046a:0001"
        Option          "XkbRules"              "xorg"
        Option          "XkbModel"              "evdev"
        Option          "XkbLayout"             "us"
#       Option          "XkbVariant"            "basic"
EndSection

Thanks!
Andre