Re: 2.5.51 -- rivafb is whacky (characters flipped on vertical axis, 640x480 usable area shown inside a higher-res area, etc).

[Antonino Daplas <adaplas@pol.net>]

On Wed, 2002-12-11 at 05:39, Miles Lane wrote:
> Hi,
> 
> I have tried getting rivafb to work in 2.5.51.  It is much better
> than before (thanks!).  It compiles and sorta works.
> 
> Here are the problems:
> 
> When I run "fbset -a 640x480", I get display that fills
> the screen and looks okay, but most of the characters are
> flipped along the vertical axis, so they are backwards, so that:
> 
> +----		    ----+
> |			|
> +---    becomes	     ---+
> |			|
> |			|
> 
What's the hardware, is it on a big endian machine? I think there's a
typo there (__BIG_ENDIAN__ instead of __BIG_ENDIAN).  This should
produce the "mirroring" effect.

Secondly, a lot of the changes there are for riva128, which may not
apply for all cards. Try doing fbset -accel false/true and see if
there's any effect. Or open linux/video/drivers/riva/fbdev.c, line 277
and comment out the line with the FB_ACCELF_TEXT.  This should force the
hardware to do everything in software.  

> Also, when I boot, the penguin logo looks like it is being rendered
> in about five colors.  In addition, the text is black, except for
That's definitely a color map problem.

> the white underscore cursor, so all I can see is the cursor.
> When the gpm gets loaded, the mouse pointer, instead of showing
> a white rectangle that, when it passes over a character, shows that
> character in reverse-video, shows a colored cursor that always
> contains some character.  The character shown in the mouse cursor 
> changes when it passes over text in the window, but it never shows
> the character it is passing over.
> 
I get this with every framebuffer driver, so this is generic.

> Lastly, when I run "fbset -a 1600x1200", a 640x480 area shows
> a usable console window, but it is embedded in the larger high
> resolution display, like this:
> 
> 	+---------+----------------+
> 	|	  |		   |
> 	|	  |		   |
> 	|	  |		   |
> 	+---------+		   |
> 	|			   |
> 	|			   |
> 	|			   |
> 	|			   |
> 	|			   |
> 	+--------------------------+
> 
> The area outside of the 640x480 boundary is filled with colored
> junk (no characters).
Because changes done via fbset are not passed to fbcon anymore.  So
you'll see the display change, but fbcon still thinks it's still on
640x480.  I guess James will add some support for that via the console.

I'll test it myself too with a riva128 PCI.

Tony



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