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Thread: [nvidia] Seiki U39UY4 (4K resolution) and xrandr problems

  1. #21
    Join Date
    Aug 2013
    Beans
    8

    Re: [nvidia] Seiki U39UY4 (4K resolution) and xrandr problems

    Quote Originally Posted by fastfourier2 View Post
    Hey guys. My Seiki 39" came in on Friday. I've read through this thread, and it's solid gold. But I can't get some things working. Hopefully you super pros can help me find my issue.

    First, I'm running 13.10 with NVidia 331.20. I have a GTX680.

    My symptoms :

    "HDMI1 : 3840x2160@30Hz" properly displays on the screen, but the screen is all black. The machine is live and responsive. I can SSH in. I can CTRL+ALT+F1 and drop to a shell. I can stop and start lightdm. But when I start lightdm, it just goes to a blank screen.

    I've tried no xorg.conf file and just a /usr/share/X11/xorg.conf.d/10-monitors.conf file. Same results.

    I've tried an xorg file generated with X -configure. (And then modifying it) Same result.

    I've tried an nvidia-xconfig generated xorg.conf file and then modified it. Same result.

    I've looked through Xorg.0.log but there are no errors. X apparently thinks everything is fine.

    Lastly, three of the Mode Validation Overrides were listed in Xorg.0.log as being invalid. Specifically, it hated "AllowNon60hzmodesDFPModes, NoEDIDDFPMaxSizeCheck, and NoDFPNativeResolutionCheck"

    Apparently those modes don't exist anymore, as per the warnings in Xorg.0.log. I used your modelines, and I've also attempted to generate my own modelines using cvt.

    Here is my xorg.conf.

    Code:
    # nvidia-xconfig: X configuration file generated by nvidia-xconfig
    # nvidia-xconfig:  version 331.20  (buildmeister@swio-display-x86-rhel47-05)  Wed Oct 30 18:20:53 PDT 2013
    
    
    Section "ServerLayout"
        Identifier     "Layout0"
        Screen      0  "Screen0"
        InputDevice    "Keyboard0" "CoreKeyboard"
        InputDevice    "Mouse0" "CorePointer"
    EndSection
    
    
    Section "Files"
    EndSection
    
    
    Section "InputDevice"
        # generated from default
        Identifier     "Mouse0"
        Driver         "mouse"
        Option         "Protocol" "auto"
        Option         "Device" "/dev/psaux"
        Option         "Emulate3Buttons" "no"
        Option         "ZAxisMapping" "4 5"
    EndSection
    
    
    Section "InputDevice"
        # generated from default
        Identifier     "Keyboard0"
        Driver         "kbd"
    EndSection
    
    
    Section "Monitor"
        Identifier     "Monitor0"
        VendorName     "Seiki"
        ModelName      "SEK039-4k"
        Modeline "3840x2160_30.00"  338.75  3840 4080 4488 5136  2160 2163 2168 2200 -hsync +vsync
        Modeline "1920x1080_60.00"  173.00  1920 2048 2248 2576  1080 1083 1088 1120 -hsync +vsync
        Option         "DPMS"
    EndSection
    
    
    Section "Device"
        Identifier     "Device0"
        Driver         "nvidia"
        VendorName     "NVIDIA Corporation"
    EndSection
    
    
    Section "Screen"
        Identifier     "Screen0"
        Device         "Device0"
        Monitor        "Monitor0"
        Option "ModeValidation" "NoVertRefreshCheck, NoHorizSyncCheck, NoMaxSizeCheck, NoMaxPClkCheck, AllowNonEdidModes, NoEdidMaxPClkCheck"
        DefaultDepth    24
        SubSection     "Display"
            Depth       24
            Modes "3840x2160" "1920x1080"
        EndSubSection
    EndSection
    Is there any chance that this newer driver is breaking some of those overrides? Or is there maybe an issue being on 13.10? Or have I just missed a step? Thanks guys.

    Not sure if it matters but the mode validation stuff is usually in the device section (not screen). Anyway I am not sure where you got that modeline for 30Hz:

    Modeline "3840x2160_30.00" 338.75 3840 4080 4488 5136 2160 2163 2168 2200 -hsync +vsync

    That is 2 Mhz under full HDMI 1.4 spec. The actual seiki modeline is only 300 Mhz. Although since the mode has _30.00 and your not using _30.00 when your loading it from the mode option under screen. Here is a the seiki 30Hz mode and 120Hz 1080p:


    Modeline "3840x2160" 296.70 3840 4016 4104 4400 2160 2168 2178 2250 +hsync +vsync
    Modeline "1920x1080" 297 1920 2008 2052 2200 1080 1084 1089 1125 +hsync +vsync

    I think to help anymore I would try running from command line:

    X -logverbose 6 :2


    And then upload your /var/log/Xorg.2.log

  2. #22
    Join Date
    Feb 2014
    Beans
    5

    Re: [nvidia] Seiki U39UY4 (4K resolution) and xrandr problems

    FYI, I got it up and running with nvidia-319. I went back and purged 331, then installed 319.

    Unfortunately, this bodes poorly for anyone who upgrades. Something has changed.

  3. #23
    Join Date
    Feb 2014
    Beans
    5

    Re: [nvidia] Seiki U39UY4 (4K resolution) and xrandr problems

    I had copied and pasted your modelines previously, and was experimenting with creating my own via cvt. i.e.

    Code:
    me@fourier:X11 $ cvt 3840 2160 30
    # 3840x2160 29.98 Hz (CVT) hsync: 65.96 kHz; pclk: 338.75 MHz
    Modeline "3840x2160_30.00"  338.75  3840 4080 4488 5136  2160 2163 2168 2200 -hsync +vsync
    That's where it was generated from. I had identical results with both modelines. Right now, I'm running what I just posted, and with the 319 driver, and no other changes, it seems to be working. I don't know why.

  4. #24
    Join Date
    Feb 2014
    Beans
    5

    Re: [nvidia] Seiki U39UY4 (4K resolution) and xrandr problems

    FYI, the need for an xorg.conf file to set the modelines for the Seiki is gone in nvidia-337 which is currently available from xorg-edgers.

  5. #25
    Join Date
    Feb 2013
    Beans
    24

    Re: [nvidia] Seiki U39UY4 (4K resolution) and xrandr problems

    Can anyone tell me if SE39UY04 is identical to SE50UY04 (the 50 inch variety) as far as interfacing with Linux and Nvidia GPU is concerned?

    I haven't found any reports of people getting SE50UY04 to work with Linux and Nvidia at 4K and 30Hz. In fact, I found a blog post by a programming team saying they tried very hard and failed to do it: http://tiamat.tsotech.com/4k-is-for-programmers-redux which leads me to suspect that it must be effectively impossible.

  6. #26
    Join Date
    Oct 2014
    Beans
    3

    Re: [nvidia] Seiki U39UY4 (4K resolution) and xrandr problems

    Hi there,

    could anyone help me with my NUC, got an LG 4K tv and struggling to get it running in 4K mode! get the following output

    nuc@nuc:~$ xrandr
    Screen 0: minimum 8 x 8, current 1920 x 1080, maximum 32767 x 32767
    HDMI1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 1600mm x 900mm
    1920x1080 60.0*+ 50.0 59.9 30.0 25.0 24.0 30.0 24.0
    1920x1080i 60.1 50.0 60.0
    1280x1024 60.0
    1360x768 60.0
    1152x864 60.0
    1280x720 60.0 50.0 59.9
    1440x576i 50.1
    1024x768 60.0
    800x600 60.3
    720x576 50.0
    720x480 60.0 59.9
    640x480 60.0 59.9 59.9
    720x400 70.1
    DP1 disconnected (normal left inverted right x axis y axis)
    HDMI2 disconnected (normal left inverted right x axis y axis)
    VIRTUAL1 disconnected (normal left inverted right x axis y axis)
    nuc@nuc:~$ xrandr --newmode "3840x2160" 307.00 3840 4016 4104 4400 2160 2168 2178 2250 +hsync +vsync
    nuc@nuc:~$ xrandr --addmode HDMI1 3840x2160
    nuc@nuc:~$ xrandr --output HDMI1 --mode "3840x2160"
    xrandr: Configure crtc 0 failed
    nuc@nuc:~$

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