VIA KM440 Ctrl-Alt-F1 gives blank screen / SuSE 9.1 Professional

Hi, Ctrl-Alt-F1 from KDE on my ACER Aspire 1353LM makes the screen go completely blank. I'm able to blindly log in / off the text console and to go back to KDE with Alt-F7. Any idea on what to try to get a proper text console? Thank you in advance, Laurent lspci: 0000:01:00.0 VGA compatible controller: VIA Technologies, Inc.: Unknown device 7205 (rev 01) XFree86.log: (II) via: driver for VIA chipsets: CLE266, KM400, K8M800 (II) Primary Device is: PCI 01:00:0 (--) Chipset KM400 found