Framebuffer problem

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  Hi,

   I'm trying to work with the framebuffer, but I'm stuck on basics and
I'm totaly new to the framebuffer stuff, and embedded :). I've tried to
compile a simple program that should just paint a square on the screen
(http://doc.trolltech.com/4.2/qtopiacore-testingframebuffer.html ). My
problem is, that is not painting a square on the screen, instead it
paints a lot of noncence all over the screen as if something is terribly
wrong with the framebuffer. I'm totally new to this framebuffer stuff,
so I don't know where to look to resolve this problem.
   My Linux Embedded is on a x86 architectur and lspci -vv is listed
below. Using make menuconfig I see that Device drivers --> Graphics
support -->
   <M> VGA 16-color graphics support
   <M> VESA VGA graphics support
    VESA driver type (vesafb-tng)
   (640x480@60) VESA default mode

and
   Device drivers --> Graphics support --> Console display driver support
     <M> Framebuffer Console support

in my grub.conf, I've tried lots and lots of different things, I've
ended upp with:
   kernel /boot/vmlinuz root=/dev/hda3 video=sisfb:mode:1024x768x32

The output from the test program (except drawing lots of junk on screen) is:
   The framebuffer device was opened successfully.
   1024x768, 32bpp
   The framebuffer device was mapped to memory successfully.


Please, help me, tell me what is wrong, or where to search for a solution??

lspci -vv:

01:00.0 VGA compatible controller: Silicon Integrated Systems [SiS]
65x/M650/740 PCI/AGP VGA Display Adapter (prog-if 00 [VGA])
         Subsystem: ASUSTeK Computer Inc. Unknown device 8081
         Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
         Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium
 >TAbort- <TAbort- <MAbort- >SERR- <PERR-
         Interrupt: pin A routed to IRQ 11
         BIST result: 00
         Region 0: Memory at e8000000 (32-bit, prefetchable) [size12%8M]
         Region 1: Memory at e6800000 (32-bit, non-prefetchable) [size12%8K]
         Region 2: I/O ports at d800 [size12%8]
         Capabilities: [40] Power Management version 2
                 Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
                 Status: D0 PME-Enable- DSel=0 DScale=0 PME-
         Capabilities: [50] AGP version 2.0
                 Status: RQ16% Iso- ArqSz=0 Cal=0 SBA+ ITACoh- GART64-
HTrans- 64bit- FW- AGP3- Rate=x1,x2,x4
                 Command: RQ=1 ArqSz=0 Cal=0 SBA- AGP- GART64- 64bit-
FW- Rate=<none>

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