Bug#449089: xserver-xorg: Auto detection fails on Thinkpad X31

[Moritz Muehlenhoff <jmm@inutil.org>]

David Nusinow wrote:
> > I've tested the auto detection code David asked for and ran into
> > a bug: When I start X.org with the auto-generated config (I use startx,
> > since I work on framebuffer console most of the time, on my notebook
> > X11 is really just a slim layer beyond MPlayer) the screen remains
> > black and the system doesn't take anymore input. (I can't switch
> > to tty2 e.g.)
> > 
> > The generated xorg.conf is included by the reportbug script,
> > my previous one can be found on http://www.inutil.org/jmm/xorg.conf 
> > 
> > Please let me know if now need further information.
> 
> <snip>
> 
> > Section "Device"
> > 	Identifier	"ATI Technologies Inc Radeon Mobility M6 LY"
> > 	Driver		"ati"
> > 	BusID		"PCI:1:0:0"
> > 	Option		"UseFBDev"		"true"
> > EndSection
> 
> It looks like in this config file you enabled fbdev while in the old one
> you didn't have this option set. Does the autogenerated config work when
> you remove that option or just say "no" to the question during
> dpkg-reocnfigure?

Indeed, the auto-generated xorg.conf works if UseFBdev is not enabled.

Does this indicate a bug in radeonfb, shall I report it to Linux kernel
bugzilla?

I don't remember if fbdev mode switches used to work in the past.

Cheers,
        Moritz