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  1. #11
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    Default Re: first Dell Precision Mobile to support 3840x2160 desktop screen on HDMI ?

    Quote Originally Posted by notebookvet View Post
    Short answer re which Dell dock: The 331-7947 is from 2012 or so, while the 430-3114 is from 2008 or before. DisplayPort 1.2 spec per Wikipedia article was approved December 2009. That essentially means, for these 3840x2160 needing DisplayPort 1.2, forget the 430-3114, and use the 331-7947.

    How did I find out their ages? Review dates, when logged in at Dell as Home user. Didn't show when logged in as Small Business user. Why a Dell employee in a chat insisted it was supporting DisplayPort 1.2 beats me. I'd have bought one or the other, same price, there was no $ for him to gain. I even asked if one model or the other was years newer, has said both are new. I guess we are in forums to discuss these things with others who use this stuff instead of call center folk who one can assume don't have these things on their own desks.
    Dual mode DP was designed as to mitigate all this gobbledegook. Look for the DP ++ symbol. If it has it, then you know it can display UHD video.
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  2. #12
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    Default Re: first Dell Precision Mobile to support 3840x2160 desktop screen on HDMI ?

    To report success and details:

    I am writing this post on a 2013 Seiki Digital SE39UY04 38.5" 4K Ultra HD display connected to a 2009 (2008 line) Dell Precision M6400 (w Nvidia Quadro FX 3700M) running Linux (RHEL 6.4 derivative) connected via dock Dell part 331-7947 (giving that old notebook a new DisplayPort 1.2) and DisplayPort to HDMI adapter Dell part 330-1271 and cable Dell part A5802058. Nice, very nice, and I can continue using this notebook.

    That specific dock (331-7947), better than Dell's published spec (1 DisplayPort) has like its older sibling "VGA / 2 x DVI / 2 x Display Ports / Serial / Parallel / 2 x PS/2 / 5 x USB / 1 x eSATA/USB port". Why Dell isn't advertising its full capabilities beats me, but I got one.

    The M6400's Nvidia Quadro FX 3700M w 1G video RAM in the M6400 has an older DisplayPort. With this 331-7947 connected is now has a DisplayPort 1.2, which allows it to drive a 3840x2160 screen (and my notebook screen is working too, and I haven't tried using the second DisplayPort because I don't need it right now). Also, I am not into 3D, I do more 2D kind of engineering.

    It was finicky and took me hours, but that was my fault: I am running Linux (RHEL 6.4 derivative, Nvidia driver 325.15), and years ago I had set the machine to use minimal power and underclock the GPU, per Nvidia specific xorg.conf options. I had to remove that, apparently a throttled GPU wasn't able to keep up the high resolution signal. Also, for Linux, now I had to put in an Nvidia specific xorg.conf option:

    Option "ModeValidation" "NoExtendedGpuCapabilitiesCheck, NoMaxPClkCheck"

    Also I think that high resolution screen for me maybe only works reliably in the dock's first DisplayPort, maybe not reliably in its second port. But let's remember we are talking 3840x2160, and I was messing with an underclocked GPU, different cables, etc, I am not sure when it started working. I am typing this on a beautiful, large, stable display, it works.

    I got a notebook introduced in 2008 to drive a year 2013 introduced 3840x2160 screen. Good engineering, Dell, Nvidia, etc!

    And thank you @adm7 for your detailed report in September.

  3. #13
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    Default Re: first Dell Precision Mobile to support 3840x2160 desktop screen on HDMI ?

    Quote Originally Posted by notebookvet View Post
    I am typing this on a beautiful, large, stable display, it works.

    I got a notebook introduced in 2008 to drive a year 2013 introduced 3840x2160 screen. Good engineering, Dell, Nvidia, etc!

    And thank you @adm7 for your detailed report in September.
    That's good to hear. This is the reasons someone would want to buy a machine of this caliber.
    Dell Precision M6700 Covet |IPS Display|3940XM|Nvidia Quadro K5000m|32GB Corsair Vengeance® 1866Mhz|Backlit keyboard|Samsung 512GB SSD|OCZ Technology 240 GB Vertex4 SATA III|Micron 240 GB C400 mSATA SSDW8 Pro|1TB HDD|Panasonic External SATA Slot Load Blu-ray XL OD |Win Pro 8.1

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  4. #14
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    Default Re: first Dell Precision Mobile to support 3840x2160 desktop screen on HDMI ?

    One more point, to make this workable I had to tell the operating system never to put the display to sleep. Else it was obnoxious about repositioning the screen in wrong relative position when coming back from sleep, not just in a simple way but being quite difficult to get back to workable after coming back from sleep, involving different steps at various times, unpredictable behavior. But, as I am saying, telling the operating system never to put the display to sleep fixed it. Now coming back to it, logging in past screensaver, it is where I left it off. Which you think is normal, but wasn't for me the last couple of days.

    To sum it up in one post, here:

    Dell Precision M6400 (similar to M6500, M6600, M6700, etc) with Nvidia Quadro FX 3700M (1GB video RAM), connected to a Seiki Digital SE39UY04 38.5" 3840x2160 via Dell dock 331-7947 (giving that old notebook a new DisplayPort 1.2) and DisplayPort to HDMI adapter Dell part 330-1271 and cable Dell part A5802058. Running Scientific Linux 6.4 (derivative of RHEL 6.4, similar to CentOS 6.4) 64 bit. At Nvidia driver 325.15. To make this work:

    In /etc/X11/xorg.conf:

    Code:
    # Xorg configuration custom rolled
    
    Section "Files"
            ModulePath   "/usr/lib64/xorg/modules/extensions/nvidia"
            ModulePath   "/usr/lib64/xorg/modules"
    EndSection
    
    Section "Device"
            Identifier  "Videocard0"
            Driver      "nvidia"
            #
            Option     "MetaModeOrientation" "Above"
            #
            Option     "ModeValidation" "NoExtendedGpuCapabilitiesCheck, NoMaxPClkCheck"
    EndSection
    On the monitor (sold as TV) tweak some settings. Such as Zoom Mode to Just Scan. And Sharpness to 0. Color and brightness to your liking.

    There was an issue left with after some time the screen going to sleep and being difficult to deal with when coming back, and this was resolved:

    System menu → Preferences → Power Management → On AC Power tab → Put display to sleep when inactive for: Never

    Also I had to undo whatever I had done previously to underclock the GPU. I don't think anyone else did that, no point describing that detail.

    Awesome to work on.

    As an engineering guy with a lot of text and 2D graphics (no 3D), a high end 2008 machine works for me in 2013.

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    Default Re: first Dell Precision Mobile to support 3840x2160 desktop screen on HDMI ?

    Quote Originally Posted by notebookvet View Post
    One more point, to make this workable I had to tell the operating system never to put the display to sleep. Else it was obnoxious about repositioning the screen in wrong relative position when coming back from sleep, not just in a simple way but being quite difficult to get back to workable after coming back from sleep, involving different steps at various times, unpredictable behavior. But, as I am saying, telling the operating system never to put the display to sleep fixed it. Now coming back to it, logging in past screensaver, it is where I left it off. Which you think is normal, but wasn't for me the last couple of days.

    To sum it up in one post, here:

    Dell Precision M6400 (similar to M6500, M6600, M6700, etc) with Nvidia Quadro FX 3700M (1GB video RAM), connected to a Seiki Digital SE39UY04 38.5" 3840x2160 via Dell dock 331-7947 (giving that old notebook a new DisplayPort 1.2) and DisplayPort to HDMI adapter Dell part 330-1271 and cable Dell part A5802058. Running Scientific Linux 6.4 (derivative of RHEL 6.4, similar to CentOS 6.4) 64 bit. At Nvidia driver 325.15. To make this work:

    In /etc/X11/xorg.conf:

    Code:
    # Xorg configuration custom rolled
    
    Section "Files"
            ModulePath   "/usr/lib64/xorg/modules/extensions/nvidia"
            ModulePath   "/usr/lib64/xorg/modules"
    EndSection
    
    Section "Device"
            Identifier  "Videocard0"
            Driver      "nvidia"
            #
            Option     "MetaModeOrientation" "Above"
            #
            Option     "ModeValidation" "NoExtendedGpuCapabilitiesCheck, NoMaxPClkCheck"
    EndSection
    On the monitor (sold as TV) tweak some settings. Such as Zoom Mode to Just Scan. And Sharpness to 0. Color and brightness to your liking.

    There was an issue left with after some time the screen going to sleep and being difficult to deal with when coming back, and this was resolved:

    System menu → Preferences → Power Management → On AC Power tab → Put display to sleep when inactive for: Never

    Also I had to undo whatever I had done previously to underclock the GPU. I don't think anyone else did that, no point describing that detail.

    Awesome to work on.

    As an engineering guy with a lot of text and 2D graphics (no 3D), a high end 2008 machine works for me in 2013.
    I own a M6600 with AMD M8900 ... Do we share the same version of display port? Mine on the right side of the chassis has the DP++ logo... I connected it directly to the the tv with a hdmi 1.4 cable + the DP>HDMI converter you have. I can't get anything other than 1080p/60hz. Did you have to setup a custom resolution or anything?

  6. #16
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    Default Re: first Dell Precision Mobile to support 3840x2160 desktop screen on HDMI ?

    Quote Originally Posted by cptcorn View Post
    I own a M6600 with AMD M8900 ... Do we share the same version of display port? Mine on the right side of the chassis has the DP++ logo... I connected it directly to the the tv with a hdmi 1.4 cable + the DP>HDMI converter you have. I can't get anything other than 1080p/60hz. Did you have to setup a custom resolution or anything?
    The DP logo is your assurance of compatibility. If you have DP++ then your ports supports the same output.

    You also don't need a converter as a simple inexpensive adapter will do. Not only does DP speaks fluent HDMI, but the process is designed to be automatic. If you're not getting the intended resolution, then the breakdown is someplace else.
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    Quote Originally Posted by Krane View Post
    The DP logo is your assurance of compatibility. If you have DP++ then your ports supports the same output.

    You also don't need a converter as a simple inexpensive adapter will do. Not only does DP speaks fluent HDMI, but the process is designed to be automatic. If you're not getting the intended resolution, then the breakdown is someplace else.
    I used the dell PN that notebookvet listed above. Which is...
    Amazon.com: Dell DisplayPort (Display Port) to HDMI Video Adapter, Connect or Cable - TK041 / 0TK041: Electronics

    Here is something I wrote on another forum:
    Quote Originally Posted by cptcorn' pid='1425' dateline='1384809386
    I started adding custom resolutions to no avail. I then found the amd patch. That didn't help. So I created an INF file from MonInfo and imported that into CRU. Now when I plug in I get the full 3840x2160 resolution, but it seems windows is scaling up the resolution from 1920x1080 to 3840x2160. Kind of odd. I've restarted a few times and when I do that it goes back to windows outputting 1080p/60, if I unplug the monitor and plug it back in, I get the 3840x2160 upscaled from 1920x1080.

    Also when I unplug/replug it goes into duplicating the display, even though I've had extend desktop selected.

    I think CCC is telling the monitor to scale it. I selected "Use centered timings" and it showed the correct size image on the monitor. However it was just a 1920x1080 image of the desktop mirrored within the 3840x2160 resolution.
    UPDATE
    I set a resolution of 3840x2160@15hz to keep it under the limit and it worked... I can get up to 18hz before it stops working. However, patching the drivers to increase the 165mhz limit and doing 3840x2160@19-30 doesn't work.

    UPDATE2
    StarTech.com DP2HDS came today. Same results as above. I know for sure that this is an active adapter.

    UPDATE3
    The bizlink TK041 I believe is a passive adapter. When I view edid information in CCC switching between the two shows adaptive and passive. Still doesn't seem to want to go past the 165mhz clock speed, even with the patch. Makes me wonder if it's a Raedon vs FirePro issue... would that affect the amd patcher you created at all?

    More Info...
    I tried plugging directly in through my hdmi out port, thinking it wouldn't work, but it did, 3840x2160@18 ... I even tried using the docking station + DP>HDMI both adapters, same results...

    More research... from displayport wiki
    In January 2013, a new VESA specification was released called DisplayPort Dual-Mode Standard version 1.1, which brings dual-mode capabilities on par with HDMI 1.4, allowing a TDMS clock rate of up to 300 MHz... -and- A notable limitation of Type 1 dual-mode is that it can only transmit single-link DVI (and HDMI), as the number of pins in the DisplayPort connector is insufficient for dual-link connections. Also, it is limited to a TMDS clock rate of 165 MHz. As a result, an active converter is needed for Dual-Link DVI, HDMI 1.3+, and analog component video such as VGA.

    Well I have both passive and active, neither go above the 165mhz clock rate.

    FINAL UPDATE
    I just recieved Accell B086B-003B which is a Type 2 active adapter. Everything works perfectly!

    http://www.amazon.com/Accell-B086B-0...splayport+hdmi
    Last edited by cptcorn; 21st November 2013 at 04:00 PM. Reason: Please use the multi quote function instead of posting after yourself

 

 
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