Xinerama support under KDE 3.4.1 on Gentoo

[Boky Gmail]

Hi all.

I have been struggling with this problem for quite a while and cant
seem to find a solution:

I have two monitors: Matrox G200 @ 1024x768 and ATI Mach64 @ 800x600.

I installed Gentoo linux and compiled X.org & KDE 3.4.1 with Xinerama
support.  Now, while xorg.conf includes "Option xinerama" and it works
quite nicely KDE seems to be xinerama-ignorant:
- windows get resized across both screens when i press maximize
- dialogs get split in the middle of both windows
- pop-up menus "falling off" of the smaller screen
- no sign of any "multi-monitor" or "xinerama" support in KDE Control center

Now, I've googled around, checked IRC but noone has any smart ideas.
Can anyone point me at what can I do/check for next?

This is my xorg.conf:

<snip>
Section "ServerFlags"
...
    Option    "Xinerama" "on"
...
EndSection
...
Section "Device"
    Option      "HWcursor"      "True"
    Option      "OverclockMem"  "True"
    Identifier  "Card0"
    Driver      "mga"
    VendorName  "Matrox Graphics, Inc."
    BoardName   "MGA G200 AGP"
    BusID       "PCI:1:0:0"
EndSection

Section "Device"
    Identifier  "Card1"
    Driver      "ati"
    VendorName  "ATI"
    BoardName   "264VT [Mach64 VT]"
    ChipSet     "ati"
    ChipId      0x5654
    ChipRev     0x8
    BusID       "PCI:0:16:0"
EndSection
___________________________________________________
This message is from the kde mailing list.
Account management:  https://mail.kde.org/mailman/listinfo/kde.
Archives: http://lists.kde.org/.
More info: http://www.kde.org/faq.html.