[Bug 13548] ATI VGA-O blank when activated in dual-headed mode

[Adr3nal D0S]

I replied on the bug.freedesktop.org site, but didn't know if I needed
to reply here.

bugzilla-daemon at freedesktop.org wrote:

> http://bugs.freedesktop.org/show_bug.cgi?id=13548

> ------- Comment #3 from agd5f at yahoo.com 2007-12-06 08:40 PST -------
> Do both heads come up ok if you don't specify a position in your
> config?

What position?  If you mean removing the 'Viewport 0 0' setting, that has no
effect.  I was doing an 'xrandr ... --right-of LVDS' to set the
relative position once X was up.

> How about if you turn the VGA port off and on?

> xrandr --output VGA-0 --off
> xrandr --output VGA-0 --mode 1600x1200

No visible effect.

I should have mentioned that when VGA-0 is on, the monitors OSD will
show the set resolution and refresh rate in spite of the fact that it
displays nothing else.  I can also drag windows from LVDS to VGA-0 and
back, but they are not displayed on VGA-0.

When VGA-0 is off the monitor looks for a signal and then goes to sleep.