linux-kernel - Re: tdfx framebuffer garbles display in 2.6.19.5

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Message-Id: <1173164006.6285.8.camel@daplas>
Date:	Tue, 06 Mar 2007 14:53:25 +0800
From:	"Antonino A. Daplas" <adaplas@...il.com>
To:	DervishD <lkml@...vishd.net>
Cc:	Linux-kernel <linux-kernel@...r.kernel.org>,
	Linux Fbdev development list 
	<linux-fbdev-devel@...ts.sourceforge.net>
Subject: Re: tdfx framebuffer garbles display in 2.6.19.5

On Tue, 2007-03-06 at 07:25 +0100, DervishD wrote:
>     Hi Antonino :)
> 
>  * Antonino A. Daplas <adaplas@...il.com> dixit:
> > On Thu, 2007-03-01 at 17:01 +0100, DervishD wrote:
> > >  * Antonino A. Daplas <adaplas@...il.com> dixit:
> > > > Can you try this patch?  It might help with the screen
> > > > corruption.
> > > 
> > >     With the patch, the scroll slows to a crawl and the system is
> > >     unusable. The time to scroll 30 lines is about a minute or so
> > >     (probably more, I just measured for a while).
> > > 
> > >     If you want me to test other patches, just tell :)
> > 
> > Can you change the mdelay to udelay and use higher/lower delay values
> > to see if there's any improvement?
> 
>     Yes, as soon as I can build a new kernel and reboot. Any suggested
> value?

You can start with 5 and increment by 5.  So you need not reboot each
time, compile tdfxfb as a module, and set CONFIG_HW_CONSOLE_BINDING=y
(under drivers->char). Make sure you have vbetool, and use the attached
script.  Thus:

modprobe tdfxfb
unbind.sh
rmmod tdfxfb
edit, make, make modules_install
modprobe tdfxfb
repeat

The script assumes vbetool is in /usr/sbin, if not just edit. Also,
unbinding will only work if X (or any graphics app, for that matter) is
not loaded.

Tony


Download attachment "unbind.sh" of type "application/x-shellscript" (599 bytes)