Dell Latitiude C800 - problems using dock video

[Alex Deucher]

On 4/10/07, Sam <ss99hi at yahoo.com> wrote:
> Thanks!  That option worked like a charm.
>

Great!

> I saw that option in the r128(4) man page, but I got scared when I read it
> might kill my FP.  So this begs the question; how might turning off the FB
> registers cause damage to my LCD (which I *think* is off when docked?)
>

I think it's more of a warning about forcing them on then off.

> And is this correct behavior for r128 or a bug?  Shouldn't setting "Display
> CRT" turn off the FB registers automatically?
>

In theory yes.  It probably needs to be looked at.  Also, FWIW, the
drive also supports dualhead so you could use both displays.

Alex

> Thanks again,
> -Sam
>
>
> --- Alex Deucher <alexdeucher at gmail.com> wrote:
>
> > On 4/10/07, Sam <ss99hi at yahoo.com> wrote:
> > > Hi,
> > >
> > > I have been struggling to get an external monitor to work with a Latitude
> > C800
> > > laptop.  The LCD screen works fine with X when the system is undocked.
> > When
> > > the system is docked, the LCD is off (obviously) and the monitor is plugged
> > > into the back of the docking station.  This is when I can't get X to work.
> > >
> > > The video card is an ATI Rage 128 Mobility M4.  I let X do the
> > configuration
> > > and then tweaked it a little (eg. "Display" "CRT").  I've included my
> > config
> > > and log file.
> > >
> > > And the odd part is I'm able to use the external monitor fine when I boot
> > up
> > > Suse 10.1 running X 6.9 and Suse 9.2 (6.8).
> > >
> > > The external monitor is a Sun 21" CRT.
> > >
> >
> > Try:
> > Option "ProgramFPRegs" "FALSE"
> > in the device section of your config.  If you still have problems file
> > a bug (https://bugs.freedesktop.org).
> >
> > Alex
> >
>
>
>
>
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