Re: fbdev modeline invalid -> black screen when using tft-displays
On Fri, Aug 20, 2004 at 02:40:03PM +0200, Joachim Steiger wrote:
>
>
> On Fri, 20 Aug 2004, Sven Luther wrote:
>
> > On Thu, Aug 19, 2004 at 10:08:49PM +0200, Joachim Steiger wrote:
> > >
> > > when booting this disk (either via default 2.4 or 2.6 kernel)
> > > the autodetection loads the radeon fbdev (which is a good idea)
> > > and then sets an total nonstandard videomode (1024x768@73Hz)
> > > if it was only 1Hz lower it would have been usable (and an VESA-mode)
> > > but this way the most tft-panels will just blank and eventually display
> > > 'mode not supported'
> >
> > This is a kernel bug, can you fil a bug report against the kernel package for
> > it ?
>
> any idea how to track it down? (check if its REALLY the kernel, since
> 2.6.7-k7 is working without problems WITH fbdev if i load it as a module
> after installing and booting 2.6.7 from harddisk
> only on the sarge-installcds i had this effect.. so it's eventually no
> kernel-problem, but a sarge-installcd-kernel-package-problem?
Mmm, what date was your sarge installcd ? There has been a known bug in there
somehow about the framebuffer loading thingy.
Now, it still is a kernel problem, since the radeonfb module should use the
DCC bus to interogate the monitor and read the EDID info back, and based on
this set a video mode supported by said monitor.
Sure, now, if d-i give it bogus module option, there may be a problem, but i
think not. Look at /lib/debian-installer-startup.d/S45frambuffer... or
something such, i think.
But try one of the daily builds first to check if it is not fixed.
Friendly,
Sven Luther
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