VMD-L Mailing List

From: Smolin, Nikolai (nikolai.smolin_at_gmail.com)
Date: Thu Dec 18 2014 - 15:13:43 CST

Hi,

which other graphic cards besides GeForce 980 you recommend for this type
of TVs (3D 4k)?

Thanks,

Nikolai

---------------------------------------------------------------------------------------------------------
Nikolai Smolin, Ph.D.
Research Associate
Department of Cell and Molecular Physiology
Loyola University Chicago
2160 South First Avenue
Maywood, IL 60153
Phone : 708 - 216 - 5158
E-mail : nikolai.smolin_at_gmail.com
E-mail : nsmolin_at_luc.edu
www : https://sites.google.com/site/nikolaismolin/

On Thu, Dec 18, 2014 at 2:31 PM, John Stone <johns_at_ks.uiuc.edu> wrote:
>
> Hi,
> I wanted to send a quick update. After updating video drivers and
> disabling the "deep color" display mode and upgrading the TV firmware
> on the LG 4K TV I've been testing, I was able to get row-interleaved
> stereo working with VMD on a GeForce 980, at full 4K resolution and without
> any color bleeding from chrominance downsampling. I've been testing the
> LG model 49UB8500-UA, but I believe that the same results would likely
> apply to their larger 55", 60", etc models.
>
> Here are my observations about getting the TV working with VMD:
> - If you drive the TV at native 4K resolution (3840x2160), and you have
> an up-to-date video driver and a GPU that can handle the full resolution
> without chrominance downsampling, you can simply enable
> "row-interleaved"
> stereo mode in VMD (nothing has to be done with the TV itself) and
> you'll
> get 3-D (you may have to enable VMD 3-D eye swap, particularly if the
> VMD
> OpenGL window gets moved around).
>
> - If you drive the TV at any resolution _below_ the native 4K hardware
> resolution (e.g. 1080p or less), the TV's built-in 3-D stereo decoder
> mode MUST be activated, and then you should set VMD's stereo mode to
> match whatever the TV's built-in stereo 3-D decoder is set to.
>
> So far, we have driven the TV at full 4K resolution and stereo on Linux,
> but we have not (yet) found a Mac laptop that is able to drive the TV
> over HDMI at full 4K resolution. All of the Macs we have tried have
> all maxed out at 1080p thus far. We haven't yet tried Windows laptops yet.
> The various stereo modes worked fine with the Mac laptops, albeit at
> only 1080p resolution.
>
> One remaining issue I have observed when using stereo 3-D with the TV
> is some apparent flicker during constantly-updating VMD rotation draws,
> and an apparent lack of vertical retrace synchronization with the GPU.
> So far this effect is relatively minor, but it is worth noting.
> I'm looking into whether this is some video driver bug or something
> else. I'll send further updates when I get it sorted out.
>
> Cheers,
> John Stone
> vmd_at_ks.uiuc.edu
>
> On Wed, Dec 17, 2014 at 10:45:24AM -0600, John Stone wrote:
> > Hi,
> > I think you missed my point -- row-interleaved hasn't worked for me
> > when running at 4K resolution, only side-by-side and over-under have
> worked
> > so far when running at the full display resolution. Row interleaved is
> one
> > of the modes that could have issues if you've got downsampled
> > chrominance (in my case the LG TV just disables these modes entirely).
> >
> > For the LG TVs I'm testing currently, the display panel appears to be
> > row-interleaved at the hardware level, so running row-interleaved is the
> > best choice for VMD, but I have to find a way to get the display to run
> > at full 4K resolution with full resolution chrominance data. I'm going
> to
> > try updating to a newer driver version and newer TV firmware and see if
> > either of those has any impact. Another potential gotcha I'm working
> > around is that some TVs support 30-bit color (10-bit per color channel)
> > and that eats some of the available HDMI bandwidth. It is possible that
> > row, column, and checkerboard stereo modes might be workable on the
> > shallow color depth modes but not in 30-bit color. I'm working on
> testing
> > that next...
> >
> > Cheers,
> > John
> >
> > On Wed, Dec 17, 2014 at 05:34:14PM +0100, Norman Geist wrote:
> > > But isn't more comfortable using the row interleaved stereo mode
> anyway,
> > > where one hasn't to deal with all of that possible issues? It will
> have full
> > > screen stereo, windowed stereo, and the TV doesn't even know that 3D
> content
> > > is present. The only disturbing thing is the eye switch which comes by
> > > moving and placing the windows.
> > >
> > > Or do I miss something?
> > >
> > > Norman Geist.
> > >
> > >
> > > > -----Ursprüngliche Nachricht-----
> > > > Von: John Stone [mailto:johns_at_ks.uiuc.edu]
> > > > Gesendet: Mittwoch, 17. Dezember 2014 17:12
> > > > An: Norman Geist
> > > > Cc: 'Smolin, Nikolai'; VMD Mailing List
> > > > Betreff: Re: vmd-l: VMD with 3D TV
> > > >
> > > > Hi,
> > > > One interesting observation I had in testing VMD with some of the
> new
> > > > LG TVs is that although the LG 4K TV supports 6 different stereo
> modes,
> > > > only some of them are usable when the video driver is set for the
> > > > native
> > > > 4K display resolution of the TV, at least in my testing with a GTX
> 980
> > > > and driver version 343.22. One potential catch with this is that
> video
> > > > cards using HDMI 1.x outputs may downsample the color information by
> 2x
> > > > or more, converting to so-called 4:2:2 or 4:2:0 color formats.
> > > >
> > > > I think that the downsampled color formats are inherently unworkable
> > > > with
> > > > row-interleaved, column-interleaved, and checkerboard stereo formats,
> > > > which in the case of the LG TVs I've been testing leaves only the
> > > > side-by-side and over-under video format. The drawback of the
> > > > side-by-side and over-under formats is that they only work correctly
> > > > with a full-screen window, and clearly that is somewhat limiting.
> > > >
> > > > I'm currently trying to sort out a video driver version that can run
> > > > the TV without any downsampling of chrominance information, and I'm
> > > > hoping
> > > > that might allow the LG TVs I'm testing to run at full 4K resolution
> > > > while also supporting windowed stereo. If you drive the LG TVs at
> > > > 1080p,
> > > > they do support all of the stereo modes, which is one reason I
> suspect
> > > > that
> > > > downsampled chrominance might causing the limitation in 4K modes.
> > > >
> > > > Cheers,
> > > > John Stone
> > > > vmd_at_ks.uiuc.edu
> > > >
> > > > On Mon, Dec 15, 2014 at 08:43:12AM +0100, Norman Geist wrote:
> > > > > VMD also offers the stereo mode row Interleaved, so you can use
> > > > any
> > > > > passive 3D Display. The graphics card or machine doesn't really
> > > > matter
> > > > > than, except of supporting the 4k resolution.
> > > > >
> > > > >
> > > > >
> > > > > Norman Geist.
> > > > >
> > > > >
> > > > >
> > > > > Von: owner-vmd-l_at_ks.uiuc.edu [mailto:owner-vmd-l_at_ks.uiuc.edu]
> Im
> > > > Auftrag
> > > > > von Smolin, Nikolai
> > > > > Gesendet: Freitag, 12. Dezember 2014 17:10
> > > > > An: vmd-l_at_ks.uiuc.edu
> > > > > Betreff: vmd-l: VMD with 3D TV
> > > > >
> > > > >
> > > > >
> > > > > Dear All,
> > > > >
> > > > > I am thinking to use VMD with 4k 3D TV.
> > > > >
> > > > > What is the best way to do it.
> > > > >
> > > > > Linux or Windows? which graphic card? Which TV is best for this?
> > > > >
> > > > > Now I have a Suse 13.1 with Quadro 2000D Workstation Graphics
> > > > Card -
> > > > > 1024MB, GDDR5, PCI Express 2.0 x16, Dual DVI, DirectX 11,
> Single-
> > > > Slot.
> > > > >
> > > > > Can I use this workstation with 4k 3D TV.
> > > > >
> > > > >
> > > > >
> > > > > Thanks,
> > > > >
> > > > > Nikolai
> > > > >
> > > > >
> ------------------------------------------------------------------
> > > > ---------------------------------------
> > > > > Nikolai Smolin, Ph.D.
> > > > > Research Associate
> > > > >
> > > > > Department of Cell and Molecular Physiology
> > > > >
> > > > > Loyola University Chicago
> > > > >
> > > > > 2160 South First Avenue
> > > > >
> > > > > Maywood, IL 60153
> > > > > Phone : 708 - 216 - 5158
> > > > >
> > > > > E-mail : [1]nikolai.smolin_at_gmail.com
> > > > > E-mail : [2]nsmolin_at_luc.edu
> > > > > www : [3]https://sites.google.com/site/nikolaismolin/
> > > > >
> > > > > References
> > > > >
> > > > > Visible links
> > > > > 1. mailto:nikolai.smolin_at_gmail.com
> > > > > 2. mailto:nsmolin_at_luc.edu
> > > > > 3. https://sites.google.com/site/nikolaismolin/
> > > >
> > > > --
> > > > NIH Center for Macromolecular Modeling and Bioinformatics
> > > > Beckman Institute for Advanced Science and Technology
> > > > University of Illinois, 405 N. Mathews Ave, Urbana, IL 61801
> > > > http://www.ks.uiuc.edu/~johns/ Phone: 217-244-3349
> > > > http://www.ks.uiuc.edu/Research/vmd/
> > >
> >
> > --
> > NIH Center for Macromolecular Modeling and Bioinformatics
> > Beckman Institute for Advanced Science and Technology
> > University of Illinois, 405 N. Mathews Ave, Urbana, IL 61801
> > http://www.ks.uiuc.edu/~johns/ Phone: 217-244-3349
> > http://www.ks.uiuc.edu/Research/vmd/
>
> --
> NIH Center for Macromolecular Modeling and Bioinformatics
> Beckman Institute for Advanced Science and Technology
> University of Illinois, 405 N. Mathews Ave, Urbana, IL 61801
> http://www.ks.uiuc.edu/~johns/ Phone: 217-244-3349
> http://www.ks.uiuc.edu/Research/vmd/
>
>