Vertical motion lines on video playback, all versions/hardware.

[Jeff Hanson]

Stephan, I think I miss wrote. They are Horizontal lines that scroll
vertically depending on the amount of motion in the video.
And I'm quite certain it isn't an age issue as most of the computers we're
donating are core2 - i3. As well as using our image on all of my personal
laptops.

I feel better at least knowing this is a well known issue. Checking the box
didn't seem to help much, but hard to tell I guess. Is there any
disadvantage to checking the box?
We can give Compton a try, but it may go against the main reason we use
this software, being it works the same on all hardware.
But it may still be good to know if we make an image for a specific lab.
Not too familiar with Compton or Compiz or how this graphics stuff works
though.



On Wed, Jul 23, 2014 at 12:37 AM, Simon Steinbeiß <simon at xfce.org> wrote:

> On Tue, 22 Jul 2014 17:32:47 -0500
> Jeff Hanson <jeff at projectcc.org> wrote:
>
> > When there is a lot of motion in a video being played back in Xubuntu, we
> > get vertical lines that scroll somewhat on the screen. This is apparent
> on
> > all types of laptops/graphics cards. VLC, Firefox, etc.
> > This doesn't seem to be the case on regular Ubuntu.
> > This is currently the most pressing concern for us to not use Xubuntu in
> > our labs. We obviously want to continue to do so obviously. Has this
> issue
> > come up already?
> > It's not totally obvious at first, but is a consistent problem we've
> > noticed over the past year.
> > Would love to hear some thoughts!
> > Thank You!
> > Jeff Hanson
> > 6087519139
> > projectcc.org
>
> Hey Jeff,
>
> this is a well known problem unfortunately. For users of some hardware (I
> think it mostly helps with Intel) enabling the "Synchronize drawing to the
> vertical blank" in Settings Manager > Window Manager Tweaks > Compositor
> helps.
> Another option is to try and use Compton – we don't ship this alternative
> compositor by default for several reasons, one of them being that to get
> the most out of it, you need to tweak the configuration according to your
> hardware quite a bit. But still, there are (good) chances that this will
> help.
> And last but not least you can try to use Compiz.
>
> More generally speaking though, there is at least some hope that this will
> get fixed before everyone moves towards Wayland, e.g. when graphics card
> vendors implement support for the Present extension of the X11 server.
> Might take a bit though and there's not much we as a distribution can do to
> help move that along.
>
> Cheers
> Simon
>
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>
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