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Re: Brightness control on PowerBook G4 1.33GHz, 12", GeForce FX Go5200

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Guido Guenther wrote:
| On Mon, Sep 27, 2004 at 04:51:51PM +0200, Guido Guenther wrote:
|>On Mon, Sep 27, 2004 at 02:08:51PM +0200, Djoumé SALVETTI wrote:
|>>Le lundi 09/27/04 Jens Schmalzing <j.s@lmu.de> a écrit :
|>>>Once offb has been started, you cannot get rid of it anymore.  In
|>>>order to use rivafb, you must build your own kernel and build rivafb
|>>>into it.  But beware, last time I tried the rivafb driver it crashed
|>>>my machine.
|>>I use a patch to control backlight with offb (attached).
|>>AFAIK, backlight control with rivafb is not yet included in vanilla
|>>or debian kernels.
|>It included in mainline and works. Problem is that the machine freezes
|>when using rivafb when switching from X to the console. I'm looking into
|>that now.
Guido, you said reports welcome:
i tried ravafb on my
12" g4 1.33Ghz Powerbook with NV34M GeForce Go5200 (rev a1)
and its not working for me:
- - with of fb compiled into the kernel as well as rivafb the framebuffer
device gives always "Name 	: OFfb NVDA,Displ" and i cant control the tft
brightness with pbbuttonsd.
- - then i removed of fb device from my .config file, but now the tft
stops with showing something like "openpic...."

btw i use 2.6.9 kernel at debian sarge. i tried
"video=rivafb:1024x768-16@75" as kernel parameter.
i did not apply the patch sent by you because you said it will just
solve a defect with console switching.

next thing i will do is try the of patch for brightness control. if
anybody got brightness control on a  12" g4 with my vga controller it
would be very nice to see the kernel param as well as the .config file
if it is special in any way (and the patches applied to make all that
possible as well).

yours, joerg

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