[gedit-list] xmodmap, German umlaut, diaeresis

[Norbert Beckmann <nb informatik uni-bremen de>]

Hello all.

I want to type German umlauts using the Meta keys on a US keyboard (Sun 
Type 7).
I created an xmodmap file "umlauts" with the following content:
----------------------------------------
keysym Meta_L = Mode_switch Mode_switch
keysym Meta_R = Mode_switch Mode_switch

keysym a = a A adiaeresis Adiaeresis
keysym e = e E ediaeresis Ediaeresis
keysym i = i I idiaeresis Idiaeresis
keysym o = o O odiaeresis Odiaeresis
keysym u = u U udiaeresis Udiaeresis
keysym y = y Y ydiaeresis Y
keysym s = s S ssharp NoSymbol

! for recognition of the umlaut setting with a grep on "xmodmap -pke":
keycode 250 = U M L 1
----------------------------------------
The call "xmodmap umlauts" makes German umlauts available instantaneously in
OpenOffice, Firefox, and other applications, but not in gedit.

Systems:
Oracle Solaris 11.1 with gedit 2.30.4 running
ubuntu 12.04 LTS (in VirtualBox) with gedit 3.4.1 running
both concerned.

Question:
How can I accomplish gedit accept these xmodmap settings?

Btw., copying umlauts into gedit (e.g. from Firefox) is possible.

Any help appreciated

Norbert