Right ALT key drives me crazy under X

["Martin Fluch" <martin.fluch@gmail.com>]

Hi!

Since a while I have a problem which drives me crazy: under X (xorg
6.9.0 from unstables). I have no idea how solve the problem.

The issue is that the right ALT key (AltGr) starts to behave like the
left one. It works fine on the console, but not under X. Regardless
how I start X: from KDM or XDM or startx. Regardless which kind of
session I use (KDE, xcf4, failsave just as a few examples).

I have a german keyboard.

I have tried to deinstall and then reinstall everything which is
related to the xserver, but it doesn't help.

xev gives me the following when I press and release first the left and
after that the right Alt key:

KeyPress event, serial 31, synthetic NO, window 0x3600001,
    root 0x44, subw 0x0, time 5411826, (-686,-240), root:(380,423),
    state 0x0, keycode 64 (keysym 0xffe9, Alt_L), same_screen YES,
    XLookupString gives 0 bytes:
    XmbLookupString gives 0 bytes:
    XFilterEvent returns: False

KeyRelease event, serial 31, synthetic NO, window 0x3600001,
    root 0x44, subw 0x0, time 5411977, (-686,-240), root:(380,423),
    state 0x8, keycode 64 (keysym 0xffe9, Alt_L), same_screen YES,
    XLookupString gives 0 bytes:

KeyPress event, serial 31, synthetic NO, window 0x3600001,
    root 0x44, subw 0x0, time 5412670, (-686,-240), root:(380,423),
    state 0x0, keycode 113 (keysym 0xffea, Alt_R), same_screen YES,
    XLookupString gives 0 bytes:
    XmbLookupString gives 0 bytes:
    XFilterEvent returns: False

KeyRelease event, serial 31, synthetic NO, window 0x3600001,
    root 0x44, subw 0x0, time 5412774, (-686,-240), root:(380,423),
    state 0x8, keycode 113 (keysym 0xffea, Alt_R), same_screen YES,
    XLookupString gives 0 bytes:

What can be the issue? I am totaly helpless at the moment? In which
config file shall I start to look at? Can anybody help me?

Thanks in advance and greetings from Helsinki,
- Martin