Subject: Re: funny framebuffer fonts on PowerBook with radeonfb
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Herbert Poetzl <herbert@13thfloor.at>
Cc: linux-fbdev-devel@lists.sourceforge.net,
       Linux Kernel ML <linux-kernel@vger.kernel.org>,
       "Antonino A. Daplas" <adaplas@hotpop.com>
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References: <20060327004741.GA19187@MAIL.13thfloor.at>
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	 <20060327033743.GA19788@MAIL.13thfloor.at>
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Date: Mon, 27 Mar 2006 16:26:38 +1100
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On Mon, 2006-03-27 at 05:37 +0200, Herbert Poetzl wrote:

> after that, the screen goes white for half a second
> and becomes black with a large terminal font on it
> (the one I get without framebuffer, I think), the
> text there is printed undistorted ... shortly after
> that, I get a flash, and the mode switches to a much
> smaller font (the final framebuffer font) and the
> kernel messages written there are already distorted.
> half a second later (or less) the penguin appears at
> the top area (undistorted), when the bootup is done
> I get the following prompt (which again is okay)
> 
> 	bash-2.05b#
> 
> typing anything there is distorted again ...

Hrm... this is a a pristine 2.6.16 without any patch applied ? Also,
what video chip revision do you have exactly ? (lspci will tell you)

> pressing enter several times leaves 'copies' of
> the caracters on the screen, forming vertical bars
> the prompt (bash) is now always fine, the copy one
> line above (as all the others) is distorted ...
> 
> note, the bootup is not much different with older
> kernels, except for the strange distortions ...
> 
> attached my kernel configuration, just in case
> it is related ...

# CONFIG_VGA_CONSOLE is not set
CONFIG_DUMMY_CONSOLE=y
CONFIG_FRAMEBUFFER_CONSOLE=y
# CONFIG_FRAMEBUFFER_CONSOLE_ROTATION is not set
CONFIG_FONTS=y
# CONFIG_FONT_8x8 is not set
# CONFIG_FONT_8x16 is not set
CONFIG_FONT_6x11=y
CONFIG_FONT_7x14=y
# CONFIG_FONT_PEARL_8x8 is not set
# CONFIG_FONT_ACORN_8x8 is not set
# CONFIG_FONT_MINI_4x6 is not set
# CONFIG_FONT_SUN8x16 is not set
# CONFIG_FONT_SUN12x22 is not set
# CONFIG_FONT_10x18 is not set

Interesting... I suspect there is an endian bug in the new font code
that hits odd sized fonts (or non-multiple-of-8 fonts). Can you try
enabling 8x8 and 8x16 instead of 6x11 and 7x14 fonts and tell me if
those work ?

Tony: If my suspition is confirmed, I think that's your call :)

Cheers,
Ben.


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