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  • Hey all, just changed over the backend after 15 years I figured time to give it a bit of an update, its probably gonna be a bit weird for most of you and i am sure there is a few bugs to work out but it should kinda work the same as before... hopefully :)

Sharp 32" PN-K321

blah (this is from the manual)
for displayport @3840x2160
"Displays using multi-streaming" and "The signals for the left and right screens are both 1920 x 2160 signals"
now if that is something in the background.. that is fine.. but if windows thinks there are two screen there... that is BS!
 
Multi-Streaming is to DisplayPort what Dual-Link is to DVI. It uses two channels to deliver the image bandwidth. The computer still sees it as one display, not two screens.
 
I got the monitor today.. sadly with MST windows/NVidia drivers see it as 2 screens. It is working great as a work desktop.. but super fail for a full screen app (like gaming or video). If there was some way to get tesla/nvs/quadro drivers installed. the Mosaic software in that will make apps/windows see it as unified desktop
4kmts1.png
4kmts2.png
 
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Talk to nvidia. It shouldn't even need Mosaic. I guess it's time for them to update their drivers to accommodate the flood of these new displays about to hit the market.
 
Guys your going to have to run ati on modern windows to get the full refresh rate unless you drive it through a single DP link that is a new enough DP to run the full resolution. Trust me I have had a lot of experience with this. You have to use eyefinity. I have done this with VP2290b that is 3840x2400 running 4x1920x1200. ATI is the only one that can join multiple monitors into a single desktop on windows 7/8/vista.

The ATI drivers were lame as it would try to do 7680x4800 (not 3840x2400) over 4 inputs. I had to create custom EDID/inf drivers for the monitor to limit the maximum resolution to 1920x1200 per quadrant in order to get it done right on ATI. For two HDMI links you probably would have to do the same thing. Make an a custom inf with custom EDID that has 1920x2180 as the maximum resolution in order to do the grouping correctly to 3840x2160 in ATI eyefinity.

From what I have seen you are screwed on nvidia to do this unless your running windows XP/XP 64-bit/server 2003 or your running linux.

On Linux with a gtx 460 I drive an IBM T221 via two dual link DVI (1920x2400) driven by each DVI port for 3840x2400 @ 48Hz:

Code: 
(WW) Apr 11 13:02:53 NVIDIA(1): Unrecognized ModeValidation token "NoEdidDFPMaxSizeCheck";
(WW) Apr 11 13:02:53 NVIDIA(1):     ignoring.
(II) Apr 11 13:02:53 NVIDIA(GPU-1): Skipping Power Connector Check.
(II) Apr 11 13:02:53 NVIDIA(GPU-1): Display (IBM T221 LHS (DFP-0)) does not support NVIDIA 3D
(II) Apr 11 13:02:53 NVIDIA(GPU-1):     Vision stereo.
(II) Apr 11 13:02:53 NVIDIA(GPU-1): Display (IBM T221 RHS (DFP-2)) does not support NVIDIA 3D
(II) Apr 11 13:02:53 NVIDIA(GPU-1):     Vision stereo.
(II) Apr 11 13:02:53 NVIDIA(1): NVIDIA GPU GeForce GTX 460 (GF104) at PCI:134:0:0 (GPU-1)
(--) Apr 11 13:02:53 NVIDIA(1): Memory: 786432 kBytes
(--) Apr 11 13:02:53 NVIDIA(1): VideoBIOS: 70.04.0b.00.66
(II) Apr 11 13:02:53 NVIDIA(1): Detected PCI Express Link width: 8X
(--) Apr 11 13:02:53 NVIDIA(1): Interlaced video modes are supported on this GPU
(--) Apr 11 13:02:53 NVIDIA(1): Connected display device(s) on GeForce GTX 460 at PCI:134:0:0
(--) Apr 11 13:02:53 NVIDIA(1):     IBM T221 LHS (DFP-0)
(--) Apr 11 13:02:53 NVIDIA(1):     IBM T221 RHS (DFP-2)
(--) Apr 11 13:02:53 NVIDIA(1): IBM T221 LHS (DFP-0): 330.0 MHz maximum pixel clock
(--) Apr 11 13:02:53 NVIDIA(1): IBM T221 LHS (DFP-0): Internal Dual Link TMDS
(--) Apr 11 13:02:53 NVIDIA(1): IBM T221 RHS (DFP-2): 330.0 MHz maximum pixel clock
(--) Apr 11 13:02:53 NVIDIA(1): IBM T221 RHS (DFP-2): Internal Dual Link TMDS
(**) Apr 11 13:02:53 NVIDIA(1): TwinView enabled
(II) Apr 11 13:02:53 NVIDIA(1): Display Devices found referenced in MetaMode: DFP-0, DFP-2
(II) Apr 11 13:02:53 NVIDIA(1): Mode Validation Overrides for IBM T221 LHS (DFP-0):
(II) Apr 11 13:02:53 NVIDIA(1):     AllowNon60HzDFPModes
(II) Apr 11 13:02:53 NVIDIA(1):     NoMaxSizeCheck
(II) Apr 11 13:02:53 NVIDIA(1):     NoHorizSyncCheck
(II) Apr 11 13:02:53 NVIDIA(1):     NoVertRefreshCheck
(II) Apr 11 13:02:53 NVIDIA(1):     NoDFPNativeResolutionCheck
(II) Apr 11 13:02:53 NVIDIA(1): Mode Validation Overrides for IBM T221 RHS (DFP-2):
(II) Apr 11 13:02:53 NVIDIA(1):     AllowNon60HzDFPModes
(II) Apr 11 13:02:53 NVIDIA(1):     NoMaxSizeCheck
(II) Apr 11 13:02:53 NVIDIA(1):     NoHorizSyncCheck
(II) Apr 11 13:02:53 NVIDIA(1):     NoVertRefreshCheck
(II) Apr 11 13:02:53 NVIDIA(1):     NoDFPNativeResolutionCheck
(II) Apr 11 13:02:53 NVIDIA(1): Assigned Display Devices: DFP-0, DFP-2
(II) Apr 11 13:02:53 NVIDIA(1): Validated modes:
(II) Apr 11 13:02:53 NVIDIA(1):     "DFP-0:1920x2400+0+0,DFP-2:1920x2400+1920+0"
(II) Apr 11 13:02:53 NVIDIA(1):     "DFP-0:NULL,DFP-2:1280x1024+0+0"
(II) Apr 11 13:02:53 NVIDIA(1): Virtual screen size determined to be 3840 x 2400
(**) Apr 11 13:02:53 NVIDIA(1): DPI set to (75, 75); computed from "DPI" X config option
 
Doing some more looking into this today and it seems like i'm coming up with the same thing. For the display to run at 60Hz, it uses multi-streaming and appears as two independent displays -- that's the way it's designed. So, yes, looks like with the current software options it's an ATI-only solution. :( All fine and great unless we need CUDA.

Looks like we'll either have to suffer with the split screen limitation or pass on this generation of hardware. Wait until the next round of displays and video cards support HDMI 2.0 for true 3840x2160 @ 60Hz over a single link. Technically DisplayPort 1.2 supports this. It is via multi-streaming, but it does not have to implement as two separate displays. That was a design choice made by SHARP and may very well have been dictated by whatever image or display processors they have and what their capabilities are.

I suppose it doesn't hurt to ask nVidia to address this issue, as they could indeed do what AMD/ATI is doing. OTOH, I'm not sure if it makes a whole lot of sense on their end. These are typical growing pains of technology and should be remedied on their own with upcoming products. However, it kinda makes me think of returning or selling my Titan card. I was going to put a 4K display on this Z820 workstation, but if my Titan won't drive it at 60Hz, then I may as well wait. Maybe it's time to benchmark some of the new ATI cards with Resolve 10... And the update to Premiere is coming soon, hopefully.
 
Stacey Spears said:
CalMAN is doing a lot of auto calibrating these days. I have not tried out v6 yet. I know their 3D LUT box is getting better based on feedback from someone who has been testing it.

I have not used an i1 in a long time. Most of the time I use a PR655 or CS200.
Click to expand...

Best LUT box is this (we tried them all) in terms of value, and it performs perfectly (BM LUT boxes are crap) But all Lut boxes cap-out at about 2K.

http://www.lightillusion.com/eecolor.html
 
Hey Guys,
I just registered to this Forum, because I saw you were the first english speaking people who got a PN-K321. Sorry I burst into here, although I do not really know what this forum is about. (Photography it seems, but I am not sure.)
I would love if you could make some tests with your display and tell me the results. I would like to know, if you could use the monitor for gaming. So I would really appreciate if you could download the Valley Benchmark (http://unigine.com/products/valley/download/) or just use a game of your own and test it in UHD Resolution. You mentioned the Problem with 60Hz and Internal Multidisplay, but with Windowed Mode it should work, shouldn't it? And with a extra Tool, you can use Borderless Windowed Mode on every program, which supports Windowed Mode (http://forums.steamgames.com/forums/showthread.php?t=2675769). When you test your monitor, could you mention how the overall looking is, and if you can see any tearing or ghosting. And if you can feel any Inputlag.
Thank you in advance.


Greetings from Germany
V. Schleevoigt
 
V. Schleevoigt said:
Hey Guys,
I just registered to this Forum, because I saw you were the first english speaking people who got a PN-K321. Sorry I burst into here, although I do not really know what this forum is about. (Photography it seems, but I am not sure.)
I would love if you could make some tests with your display and tell me the results. I would like to know, if you could use the monitor for gaming. So I would really appreciate if you could download the Valley Benchmark (http://unigine.com/products/valley/download/) or just use a game of your own and test it in UHD Resolution. You mentioned the Problem with 60Hz and Internal Multidisplay, but with Windowed Mode it should work, shouldn't it? And with a extra Tool, you can use Borderless Windowed Mode on every program, which supports Windowed Mode (http://forums.steamgames.com/forums/showthread.php?t=2675769). When you test your monitor, could you mention how the overall looking is, and if you can see any tearing or ghosting. And if you can feel any Inputlag.
Thank you in advance.


Greetings from Germany
V. Schleevoigt
Click to expand...

it isn't the greatest gaming monitor. We have a thread over @ hardocp's forums that talks about its fail.
 
Canon showed a prototype 30" UHD monitor at NAB that looked pretty good (of course its a demo so that can be fool's gold) but their booth personnel wouldn't forecast when, or even if, it would be put into production - let alone pricing.

Still hoping that Apple puts a UHD display with decent IQ in the market sooner than later, not sure what the pricing will be but its hard to imagine they'd exceed $3,000 as it would limit their sales volume too much to fit their usual MO. I keep expecting a 42" LED backlit LCD panel for around $2,500 with some pretty decent on board processing muscle...

Cheers - #19
 
houkouonchi said:
Guys your going to have to run ati on modern windows to get the full refresh rate unless you drive it through a single DP link that is a new enough DP to run the full resolution. Trust me I have had a lot of experience with this. You have to use eyefinity. I have done this with VP2290b that is 3840x2400 running 4x1920x1200. ATI is the only one that can join multiple monitors into a single desktop on windows 7/8/vista.

The ATI drivers were lame as it would try to do 7680x4800 (not 3840x2400) over 4 inputs. I had to create custom EDID/inf drivers for the monitor to limit the maximum resolution to 1920x1200 per quadrant in order to get it done right on ATI. For two HDMI links you probably would have to do the same thing. Make an a custom inf with custom EDID that has 1920x2180 as the maximum resolution in order to do the grouping correctly to 3840x2160 in ATI eyefinity.

From what I have seen you are screwed on nvidia to do this unless your running windows XP/XP 64-bit/server 2003 or your running linux.

On Linux with a gtx 460 I drive an IBM T221 via two dual link DVI (1920x2400) driven by each DVI port for 3840x2400 @ 48Hz:
Click to expand...

@houkouonchi, I am thinking of getting the Sharp PN-K321 for my Debian linux workstation. What is the minimum graphics card I would need, just to display X windows stuff (no fancy graphics)? And how did you configure your linux install to recognize the IBM T221 and drive it at 3840x2400 through both DVI-D connections?
 
I have the Sharp PN-K321 and am less than impressed. When viewed on the PN-K321, pictures and movies appear to have lower dynamic range (and clearly lesser image quality) than on any of the other high resolution displays I have recently used, including the Dell 3011 monitor, the iMac monitor, and the Chromebook Pixel monitor. I would not recommend the PN-K321 monitor to photographers or film makers.
 
Eric R. said:
@houkouonchi, I am thinking of getting the Sharp PN-K321 for my Debian linux workstation. What is the minimum graphics card I would need, just to display X windows stuff (no fancy graphics)? And how did you configure your linux install to recognize the IBM T221 and drive it at 3840x2400 through both DVI-D connections?
Click to expand...

Sorry. Was not subscribed to this thread.

Looking at the manual it says:

Set HDMI 1, HDMI2, or Dual HDMI in input select. So it looks like it can be driven off dual HDMI as well as DP/MST.

The only video card I know that has two HDMI ports is:

http://www.newegg.com/Product/Product.aspx?Item=N82E16814500271

Who knows if they are both HDMI 1.4 ports. Also the linux drivers did not even support HDMI 1.4 on nvidia until I bitched at them about it and they came out with new drivers a few days ago but HDMI @ > 165 Mhz pixel clock (IE the signal that isnt compatible with DVI) can be hit or miss I think.

Unfortunately no DP -> HDMI adapters exist that can push the type of bandwidth you need at this time (hopefully one will be available in the next few weeks.

The only problem I could see with linux on this display is if the linux driver doesnt work with MST right. If it just shows as two different displays (DFP's) then it should be relatively simple to get working but whether or not that works correctly or not... is another thing. I know my laptop (gt 650m) is only a 480 Mhz pixel clock DP port where as my gtx 670 is 960 Mhz so I would be careful about getting a really low end card if you want to try the DP way.

Anyway to make it show up on linux as one screen it is really quite easy. Here is an example of my T221:

Code: 
Section "Screen"
    Identifier     "9503-dgp"
    Device         "gtx_460_1"
    Monitor        "IBM 9503-dgp"
    DefaultDepth    24

    Option "DPI" "75 x 75"
    Option "ExactModeTimingsDVI" "true"
Option "ModeValidation" "AllowNon60HzDFPModes, NoEdidDFPMaxSizeCheck, NoVertRefreshCheck, NoHorizSyncCheck, NoMaxSizeCheck, NoDFPNativeResolutionCheck"
    Option     "NoTwinViewXineramaInfo" "1"
    Option         "TwinView" "1"
    Option         "metamodes" "DFP-0: 1920x2400 +0+0, DFP-2: 1920x2400 +1920+0"
    SubSection     "Display"
        Depth       24
        Modes "3840x2400"
    EndSubSection
EndSection

Basically its pretty standard twinview with the exception of having:

Option "NoTwinViewXineramaInfo" "1"

Which basically means it doesn't use xinerama for the twinview configuration and the OS sees it as just a single monitor instead of a dual monitor setup (like spanning on windows XP). It is possible this display could utterly fail on linux just due to the fact of lack of dual HDMI cards and due to I am not 100% sure MST works properly on linux or not. Getting around the 'two monitor' problem is easy though. If the display took 2x dual link DVI it would be a lot easier to drive in linux and I would also be 100% certain it would work ok.


Eric: Were you able to get it working on linux ok at the full 60Hz?
 
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