tridentfb with cyberblade i7

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Hello everybody!

I just installed ubuntu-linux on an older notebook with a trident
cyberblade i7 onboard graphic card and I have several problems with
tridentfb from vanilla-linux-2.6.11

1. The kernel commandline seems to be ignored:

both
video=tridentfb:800x600,bpp=16
and
video=tridentfb,mode:800x600-16@60,fb

deserve 640x480-8

2. No matter what mode being selected the cursor is fixed to the last
line (after touching it the first time) and scrolling is only done in
this line (does not apply to ncurses apps which control the terminal).

3. clear doesn't clear the screen but puts the cursor to the first line.
 (ncurses apps also seem to have this problem)

I took some screenshots:

http://leidola.newcon.de/pixmap/laptop-fb/aptitude.png
http://leidola.newcon.de/pixmap/laptop-fb/refreshed.png
http://leidola.newcon.de/pixmap/laptop-fb/refreshed-fbset.png


As you can see, there is some strange noise at the bottom-right corner
in 800x600x16 mode (set via fbset).

lscpi:
0000:01:00.0 VGA compatible controller: Trident Microsystems
CyberBlade/i7d (rev 5c)



dmesg:

Apr 18 15:41:40 laptop kernel: Kernel command line: root=/dev/hda2 ro
quiet splash video=tridentfb:800x600,bpp=16,fb
...
Apr 18 15:41:40 laptop kernel: tridentfb: Trident framebuffer
0.7.8-NEWAPI initializing
Apr 18 15:41:40 laptop kernel: ACPI: PCI Interrupt Link [LNKA] enabled
at IRQ 9
Apr 18 15:41:40 laptop kernel: PCI: setting IRQ 9 as level-triggered
Apr 18 15:41:40 laptop kernel: ACPI: PCI interrupt 0000:01:00.0[A] ->
GSI 9 (level, low) -> IRQ 9
Apr 18 15:41:40 laptop kernel: tridentfb: framebuffer size = 4096 Kb
Apr 18 15:41:40 laptop kernel: tridentfb: 0000:01:00.0 board found
Apr 18 15:41:40 laptop kernel: tridentfb: 800x600 flat panel found
Apr 18 15:41:40 laptop kernel: Console: switching to colour frame buffer
device
80x25
Apr 18 15:41:40 laptop kernel: tridentfb: fb0: Trident frame buffer
device 640x400-16bpp
...



What could I do about it?

Ciao,

Olaf
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