Re: vertical stripes under OpenFirmware and offb

[Boris Bezlaj <boris@gajba.net>]

On Wed, Apr 02, 2003 at 11:12:45PM +0100, James Simmons wrote:
> 
> > could anyone explain what kind of misconfiguration of framebuffer in OpenFirmware
> > or in general would cause the vertical stripes effect? White stripes, width about the
> > same as the width of characters and some garbage pixels between lines on black background.
> > If the white stripes would stick together, the screen with letters would look in order.
> 
> Which kernel are you using? What is configuration?
>  
Stock 2.4 kernels with video=imsttfb:vmode:12 boot parameters. I need to
modify the DAC type detection for the IMS to work properly..original
wrongly detects IBM ramdac.. PCI ID's are used wrongly i suppose.

Otherwise if i use offb i get the above mentioned effects as OF does not
initialize the dac..so i belive.

OF device node: IMS,tt128mb8

lspci output:
01:0f.0 Class 0380: 10e0:9128 (rev 01)
        Flags: bus master, medium devsel, latency 32, IRQ 29
        Memory at 90000000 (32-bit, prefetchable) [size=16M]
        Expansion ROM at 92000000 [disabled] [size=64K]

ON CHIP INFO:

IMS TT 128M8 rev 3.6

Chip: Twin Turbo 128+
I2C 0174
IMS 9130 <-- note: PCI ID says 9128
NNM 9644 (two triangles on end..)
WE 15680
MALAYSIA

DAC chip: VIDEO ( TexasInstruments logo)
TVP 3030
-220PPA
6049027  69AE20W

> A IMS card user. Could you try out the imsttfb driver as well. I liek to 
> know how well it works in 2.5.X.

I promise i will 8) As soon as i get it to compile/boot properly.

And thanks for looking after the driver..the meintainer seems to be on a
very looong vacations :(

-- 

  Boris


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