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

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Date:	Wed, 7 Mar 2007 11:02:58 +0100
From:	DervishD <lkml@...vishd.net>
To:	"Antonino A. Daplas" <adaplas@...il.com>
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

    Hi Antonino :)

 * Antonino A. Daplas <adaplas@...il.com> dixit:
> On Tue, 2007-03-06 at 07:25 +0100, DervishD wrote:
> > > >     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?

    Regarding the delay: I've discovered a weird thing. When the display
is garbled, if I insist on outputting more text to the screen, sooner or
later it de-garbles! In fact, once the display has been garbled (not
easy to do, sometimes I can work for hours in a terminal before it gets
garbled, I can't reproduce it always), a continous output makes it
de-garble and garble again, in cycles.

    Looks like an off-by-one error rather than a speed/sync error, am I
completely clueless?

    This happens with vanilla 2.6.19.5, not with the patched one, which
I haven't been able to test yet (sorry...).

    Raúl Núñez de Arenas Coronado

-- 
Linux Registered User 88736 | http://www.dervishd.net
It's my PC and I'll cry if I want to... RAmen!
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