xf86-video-intel: XV using the wrong pipe

[Alan Hourihane]

On Sat, 2007-04-14 at 00:45 +0800, JM Ibanez wrote:
> Alan Hourihane <alanh at fairlite.demon.co.uk> writes:
> 
> > On Fri, 2007-04-13 at 22:31 +0800, JM Ibanez wrote:
> >> Alan Hourihane <alanh at fairlite.demon.co.uk> writes:
> >> 
> >> > On Fri, 2007-04-13 at 22:02 +0800, JM Ibanez wrote:
> >> >> Hi,
> >> >> 
> >> >> Since bugs.freedesktop.org seems to be down, I might as well report this
> >> >> here. Has anyone encountered this?
> >> >> 
> >> >> On my laptop, XVideo using xf86-video-intel git seems to be using the
> >> >> wrong pipe (or at least, it is "hardcoded" to just one pipe). When I
> >> >> have another display plugged in but cloned to the laptop's display
> >> >> (i.e. they're displaying the same image at the same resolution), running
> >> >> 'mplayer -vo xv /some/mpg/file' will show output on the external display
> >> >> and a blue screen on the laptop display. However, when I configure
> >> >> dual-head (mergefb), there's output when mplayer's window is in the
> >> >> external display, but blue screen on the local display.
> >> >> 
> >> >> Anyone experience this aside from me?
> >> >
> >> > That's actually a feature of the chip. It can't display the overlay to
> >> > both pipes at the same time. 
> >> >
> >> > If you run cloned on the same pipe, then it works, but there's the
> >> > restriction that the same resolution & refresh rate must be compatible
> >> > with both output devices.
> >> 
> >> It's the *same* resolution and *same* refresh rate.
> >> 
> >> And, it gets even more interesting.
> >> 
> >> Without any external display plugged in, nothing comes out when playing
> >> movies on the local display; *however*, when the external display is
> >> plugged in and is made a clone, output shows on the external display.
> >> 
> >> It's a bug, I tell you. :)
> >
> > I bet you've got the option "Clone" in your xorg.conf ??
> 
> Nope. See my xorg.conf, attached.
> 
> > If so, it's not a bug, it's the feature I describe. You need to do
> > this..
> >
> > Option "MonitorLayout" "NONE,CRT+LFP"
> >
> > to get true cloned on a single pipe. And make sure you remove the Clone
> > option.
> 
> I'm using XRandR 1.2 to achieve cloning, so I can't say whether or not
> it's doing what 'Option "Clone"' did in the pre-modesetting driver.
> 
> [snip]
> 
> > That may well be a bug, it should be flipping the output pipe for Xv
> > when the video window moves.
> 
> Exactly. In my case, it seems that Git HEAD is driving Xv only on one
> pipe, regardless of where the overlay is really.
> 
> >
> >> > The alternative is to use textured overlay which will work either way.
> >> 
> >> How do you enable that on the i855GM? (considering also that I have DRI
> >> disabled due to my virtual screen size being larger than 2048)
> >
> > You need to use the latest 1.9.94 driver.
> 
> I'm on Git HEAD, as mentioned in my first post.

Ah, i hadn't noticed that. You'd need to file a bug then.

Alan.