AltGr key not working outside GNOME

Description: Ubuntu 8.04.2
Release: 8.04

xorg:
  Installiert:1:7.3+10ubuntu10.2
  Mögliche Pakete:1:7.3+10ubuntu10.2
  Versions-Tabelle:
 *** 1:7.3+10ubuntu10.2 0
        500 http://de.archive.ubuntu.com hardy-updates/main Packages
        100 /var/lib/dpkg/status
     1:7.3+10ubuntu10 0
        500 http://de.archive.ubuntu.com hardy/main Packages

I just switched to console login and starting X via startx using ion as window manager.

The AltGr key on my keyboard stopped working since then. If I start the gnome-keyboard-properties tool, it works but only within the gnome-keyboard-properties window.

I get the following messages on console when starting X:

expected keysym, got XF86KbdLightOnOff: line 70 of pc
expected keysym, got XF86KbdBrightnessDown: line 71 of pc
expected keysym, got XF86KbdBrightnessUp: line 72 of pc
expected keysym, got XF86KbdLightOnOff: line 70 of pc
expected keysym, got XF86KbdBrightnessDown: line 71 of pc
expected keysym, got XF86KbdBrightnessUp: line 72 of pc
The XKEYBOARD keymap compiler (xkbcomp) reports:
> Warning: Type "ONE_LEVEL" has 1 levels, but <RALT> has 2 symbols
> Ignoring extra symbols
Errors from xkbcomp are not fatal to the X server

The keyboard section of my xorg.conf looks like this:

Section "InputDevice"
        Identifier "Generic Keyboard"
        Driver "kbd"
        Option "CoreKeyboard"
        Option "XkbRules" "xorg"
        Option "XkbModel" "pc105"
        Option "XkbLayout" "de"
        Option "XkbVariant" "nodeadkeys"
EndSection

If I run xev and press AltGr+q for example I get the following output on console:

KeyPress event, serial 25, synthetic NO, window 0x1600001,
    root 0x8a, subw 0x0, time 9196321, (350,-10), root:(350,36),
    state 0x0, keycode 113 (keysym 0xfe03, ISO_Level3_Shift), same_screen YES,
    XLookupString gives 0 bytes:
    XmbLookupString gives 0 bytes:
    XFilterEvent returns: False

KeyPress event, serial 25, synthetic NO, window 0x1600001,
    root 0x8a, subw 0x0, time 9196553, (350,-10), root:(350,36),
    state 0x88, keycode 24 (keysym 0x40, at), same_screen YES,
    XLookupString gives 1 bytes: (40) "@"
    XmbLookupString gives 1 bytes: (40) "@"
    XFilterEvent returns: False

KeyRelease event, serial 25, synthetic NO, window 0x1600001,
    root 0x8a, subw 0x0, time 9196689, (350,-10), root:(350,36),
    state 0x88, keycode 24 (keysym 0x40, at), same_screen YES,
    XLookupString gives 1 bytes: (40) "@"
    XFilterEvent returns: False

KeyRelease event, serial 25, synthetic NO, window 0x1600001,
    root 0x8a, subw 0x0, time 9196801, (350,-10), root:(350,36),
    state 0x88, keycode 113 (keysym 0xfe03, ISO_Level3_Shift), same_screen YES,
    XLookupString gives 0 bytes:
    XFilterEvent returns: False

If I press AltGr+q within an xterm nothing happens. So it seems to me that the key is recognized but not printed?!?

My .xsession :

if [ -e ~/.Xmodmap ]; then
  /usr/bin/xmodmap ~/.Xmodmap
fi
/usr/bin/urxvtd -q -o -f
/usr/bin/docker >/dev/null &
/usr/bin/xscreensaver -nosplash >/dev/null &
ion3

My .Xmodmap :

! ~/.Xmodmap

! rechte win-menu taste:
add Mod3 = Menu

! Microsoft Ergonomic Keyboard 4000
! Zoom should work like mouse wheel already
! Homepage, Search, E-Mail
!keycode 130 = XF86HomePage
keycode 178 = XF86WWW
keycode 229 = XF86Search
!keycode 120 = XF86Mail
keycode 236 = XF86Mail
! 1 - 5 special keys
keycode 183 = XF86Launch1
keycode 184 = XF86Launch2
keycode 93 = XF86Launch3
keycode 131 = XF86Launch4
keycode 247 = XF86Launch5
! Audio Mute, Volume Lower, Volume Raise, Play
keycode 160 = XF86AudioMute
keycode 174 = XF86AudioLowerVolume
keycode 176 = XF86AudioRaiseVolume
keycode 162 = XF86AudioPlay
! Calc
keycode 161 = XF86Calculator
! Favourites
keycode 230 = XF86Favorites
! Back/Forward
keycode 234 = XF86Back
keycode 233 = XF86Forward
! F1 - F12 second row without F-Caps-Key (right side of F12)
keycode 245 = osfHelp
keycode 135 = osfUndo
keycode 138 = osfRestore
keycode 137 = XF86New
keycode 191 = XF86Open
keycode 175 = XF86Close
keycode 228 = XF86Reply
keycode 142 = XF86MailForward
keycode 218 = XF86Send
keycode 240 = XF86Spell
keycode 213 = XF86Save
keycode 185 = XF86Launch6
! the three keys top left in number block
! the backspace key right has code 22 already and works like backspace
keycode 157 = XF86Launch7
keycode 246 = XF86Launch8
keycode 251 = XF86Launch9

On virtual console (text mode) everything works just fine.