dual head using HDMI output on ati radeon 5470

[Jared Greenwald]

I ran into this previously with an on-board ATI graphics card on a
home-built PC.  I'm pretty sure that ATI only allows one of each type
of connection - ie one digital (hdmi/dvi) and one analog (vga).  Could
be wrong, but I think that's the issue you're running into.

On Thu, Jan 27, 2011 at 7:39 PM, Albert Wagner <albertwagner at cox.net> wrote:
> I have Ubuntu 10.10 running on an HP G72 laptop with vga and HDMI  outputs
> from an ATI Radeon 5470.  Dual heads is simple with vga: just use
> System->Preferences->Monitors.  But, getting anything at all from the HDMI
> output is proving to be very difficult.
>
> My digital monitor is an HP 2310e that looks outstanding when driven by a
> dvi input on another machine.  But it has only digital inputs, no vga.
>
> I would really appreciate feedback from anyone using the Ubuntu Radeon
> driver(KMS on is default) as to whether, and how, it can be coerced to
> detect the HP 2310e and output through the Radeon 5470 HDMI plug.
>
>
>
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