XGetImage returns junk with Xorg/dummy_drv/VTs

[McDonald, Michael-p7438c]

> -----Original Message-----
> From: Daniel Stone [mailto:daniel at fooishbar.org] 
> Sent: Friday, November 21, 2008 9:43 PM
> To: McDonald, Michael-p7438c
> Cc: xorg at lists.freedesktop.org
> Subject: Re: XGetImage returns junk with Xorg/dummy_drv/VTs
> 
> On Fri, Nov 21, 2008 at 03:23:03PM -0700, McDonald, 
> Michael-p7438c wrote:
> >   I'm trying to run the Xorg server using the dummy driver in the
> > "background" in Linux. Everything works fine as long as the 
> dummy Xorg
> > has the VT "focus". If it's in the background, then 
> XGetImage returns
> > junk data.

> Yeah, when you don't have vtSema, your rendering is just random crap.

  Why? X apps don't know (and can't find out) about VT switching.

> You probably want Xvfb instead of Xorg+dummy.

  Ultimately I need Xorg+intel, so I was simplifying things using
Xorg+dummy. Also, until Friday, I couldn't get input to work using Xvfb.
Then I found out that Xvfb's modmap was garbage and that if you replace
it with whatever you're using on your main display, then input works
using XTEST.

Mike McDonald