Re: Re: cyblafb in kernel 2.6.16: corrupted display in Xfree86

[Knut Petersen <Knut_Petersen@t-online.de>]

Thomas Arendsen Hein schrieb:

>* Knut Petersen <Knut_Petersen@t-online.de> [20060323 18:07]:
>  
>
>>Thomas Arendsen Hein schrieb:
>>
>>    
>>
>>>With /sbin/modprobe cyblafb && /usr/sbin/fbset -a 1152x864-70 -depth 16
>>>(changing fb.modes would probably help, too) everything is back to
>>>normal for me.
>>>      
>>>
>>So the problem is that the 8bpp modes do not work with the
>>X framebuffer driver. Please report that bug, I think X is responsible.
>>    
>>
>
>But why did it work up to 2.6.15.6 then?
>I know for sure that I had 8bpp in fb console and 16bpp in X.
>
>  
>
Well, cyblafb does not use vga style panning registers any longer.
That change is necessary to support ywrap scrolling and to allow
screen rotation. The trident X driver does not know about the
graphics engine registers I use instead, and I had to include
some hacks to allow that to work.

Try to change

    #define CYBLAFB_KD_GRAPHICS_QUIRK 1

to

    #define CYBLAFB_KD_GRAPHICS_QUIRK 0

in cyblafb.c for purely diagnostic purposes. Does that restore the old
behaviour for you?


cu,
 Knut


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