Re: cyblafb in kernel 2.6.16: corrupted display in Xfree86

[Thomas Arendsen Hein <thomas@intevation.de>]

* Knut Petersen <Knut_Petersen@t-online.de> [20060323 16:07]:
> Thomas Arendsen Hein schrieb:
> >>That is very slow. Use geometry 1152 864 2048 4096 8
> >
> >This only works with kernel 2.6.16, not with 2.6.15.6
>
> ACK

Wow, scrolling in the console is definitely _much_ faster with this:

time for "find /dev" on kernel 2.6.16:

       1152/864  2048/4096
 8bpp    18s       0.56s
16bpp    39s       0.65s

> >>Are there any problems if you use the standard resolutions, eg 1024x768 
> >>or 1280x1024?
> >
> >No and yes:
> >Everything works fine when using
> >/sbin/modprobe cyblafb bpp=16 mode=1280x1024 ref=85
> >but I get the same problems if I do:
> >/sbin/modprobe cyblafb && /usr/sbin/fbset -a 1280x1024-85
> 
> Please Try:
> 
> /sbin/modprobe cyblafb && /usr/sbin/fbset -a 1280x1024-85 -depth 16

works

> /sbin/modprobe cyblafb && /usr/sbin/fbset -g 1152 864 1152 864 8 -t 10000 
> 168 40 57 13 152 11

doesn't work

> /sbin/modprobe cyblafb && /usr/sbin/fbset -g 1152 864 1152 864 16 -t 10000 
> 168 40 57 13 152 11

works

> /sbin/modprobe cyblafb && /usr/sbin/fbset -g 1152 864 2048 4096 8 -t 10000 
> 168 40 57 13 152 11

doesn't work

> /sbin/modprobe cyblafb && /usr/sbin/fbset -g 1152 864 2048 2048 16 -t 10000 
> 168 40 57 13 152 11

works

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.

I think the extra colors on console won't hurt, now that I know
about the 2048/4096 setting.

> Is there a special reason not to use the X* trident driver?

Yes, I had crashes when using more than one X display (e.g. one
local xdm and one "X -query other :1"), and switching between X and
console is _much_ faster this way.

Many thanks for the help (and for cyblafb in general),
Thomas

-- 
Email: thomas@intevation.de
http://intevation.de/~thomas/


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