Overlay Problem

[eric@xxxxxxxxx]

Hi,

I'm not able to have overlay working with the following configuration :
Hardware :
        - bt878 (Hauppauge winTV)
        - Motherboard KT400
        - Nvidia Geforce2 MX
Software :
        - all kernel (tested) to 2.4.21-rc2
        - stock bttv or bttv 0.9.10
        - open and closed source nvidia driver

Here's an extract from lspci :

00:00.0 Host bridge: VIA Technologies, Inc. VT8377 [KT400 AGP] Host Bridge
00:08.0 Multimedia video controller: Brooktree Corporation Bt878 Video
Capture (rev 11)
00:08.1 Multimedia controller: Brooktree Corporation Bt878 Audio Capture
(rev 11)
01:00.0 VGA compatible controller: nVidia Corporation NV11DDR [GeForce2 MX
100
DDR/200 DDR] (rev b2)

The thing is I only get a black screen. But, just after initializing the
modem or when switching from from fullscreen to window mode, I'm able to
see an image.
I try different options when loading bttv module (gbuffer ...) but
nothing change.

Is there something that need to be done to make this working ?

Thanks in advance