XV Acceleration on Secondary Display

Alex Deucher alexdeucher at gmail.com
Mon Dec 7 07:26:45 PST 2009

On Mon, Dec 7, 2009 at 10:09 AM, Gordan Bobic <gordan at bobich.net> wrote:
> Alex Deucher wrote:
>> On Fri, Dec 4, 2009 at 12:41 PM, Gordan Bobic <gordan at bobich.net> wrote:
>>> Hi,
>>> I'm trying to get XV acceleration to work on the secondary display on my
>>> laptop, and I'm not having any success. Playing videos with XV
>>> acceleration on the primary display works fine, but on the secondary it
>>> always falls back to X11 rendering which is sufficiently slow that the
>>> frame drop makes it unusable.
>>> I tried switching the layout around (making Screen1 0 0, Screen0 LeftOf
>>> Screen1) and that didn't make any difference. I also tried:
>>> Option "Primary" "true" on Screen1, but that didn't help, either.
>>> The VGA controller is an ageing Rage Mobility M4, and in lspci it shows
>>> up as a single device, but specifying an additional r128 device section
>>> without device ID and attaching Screen/Monitor sections to it gets the
>>> external screen up.
>>> How can I get the external monitor to be the primary (actually primary,
>>> not just by desktop icon placement appearance) and thus get XV
>>> acceleration on that instead of the laptop's built in screen?
>> It's a limitation of the r128 driver right now.  The video overlay
>> only works with the first display controller which is currently
>> hardcoded to drive the laptop flatpanel.  I had a branch at one time
>> in my repo on fdo to add support for r128 to the radeon driver,
>> including textured video support for r128 (which will work on
>> either/both head(s)), however, I need to find where I had that tree
>> since we lost /home on fdo.
> I see. So best case, about 2 years before it makes it into a stable
> distribution?

I doubt it'll ever make it upstream.  I don't have the spare time to
mess with it much anymore.  I'll let you know when I find the tree if
you want to play with it yourself.


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