[Intel-gfx] Dual Monitor Issue. One monitor is partly visible on another

[Chris Wilson]

On Wed, 23 Mar 2011 17:47:14 -0300, Gabriel Torreiro de Moraes <gtmoraes1 at gmail.com> wrote:
> So, after some Intel Drivers update, some programs started to work
> nicely, faster and beautifully. But it corrupted my Dual-Monitor Setup.
> I don't know what to say, I'm totally desperate. I had to show one of my
> programs to my teacher using a projector, but with the dual monitor
> corruption, I called in sick today. I need to use the netbook screen to
> make changes on the program and the second monitor/projector to show the
> program working.

Good news! We fixed this bug 7 months ago.

commit 52e68630d13f9668f8f4dd6978fa41039bacfaf6
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Sun Aug 8 10:15:59 2010 +0100

    drm/i915: Fix offset page-flips on i965+
    
    i965 uses the Display Registers to compute the offset from the display
    base so the new base does not need adjusting when flipping. The older
    chipsets use a fence to access the display and so do perceive the
    surface as linear and have a single base register which is reprogrammed
    using the flip.
    
    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
    Cc: Jesse Barnes <jbarnes at virtuousgeek.org>
    Reported-by: Marty Jack <martyj19 at comcast.net>
    Reviewed-by: Jesse Barnes <jbarnes at virtuousgeek.org>

-- 
Chris Wilson, Intel Open Source Technology Centre