XB270HU with Linux

scsjason
scsjason Member Posts: 5 New User
in 2015 Archives

Hi,

 

    I am trying to use the XB270HU monitor with Linux (Centos 7) from an NVIDIA K4200 card. I can get 

it working easily at 60Hz, but if I select either 120Hz or 144Hz the output is just black (but the machine

is still running, and there are no errors in the Xorg.0.log file). 

 

Anyone got any ideas ?

 

The log file contains some complaints about the edid being incorrect (not reporting a 24Hz mode) but no errors.

 

-- 

jason

Answers

  • -Justin
    -Justin Member Posts: 2,362 Skilled Specialist WiFi Icon

    scsjason,

     

    Have you went into the OSD menu and checked to see if the DP is at 1.1 or 1.2? Here is an article that discusses it, if that helps. It should work at the 120 Hz setting, Here is some information I found:

     

    PNY site

    • Maximum DP 1.2 Resolution 3840 x 2160 at 60Hz and 2560 x 1600 at 120Hz (direct connect)
    • Maximum DVI-I DL Resolution 2560 x 1600 at 60Hz and 1920 x 1200 at 120Hz
    • Maximum DVI-I SL Resolution 1920 x 1200 at 60Hz and 1920 x 1200 at 120Hz
    • Maximum VGA Resolution 2048 x 1536 at 85Hz

    NVidia site

    • Max DP 1.2 Resolution 3840 × 2160 at 60 Hz
    • Max DVI-I DL Resolution 2560 × 1600 at 60 Hz
    • Max DVI-I SL Resolution 1920 × 1200 at 60 Hz
    • Max VGA Resolution 2048 × 1536 at 85 Hz
  • voor
    voor Member Posts: 2 New User

    Acer-Justin,

     

    There is no option to change the DP between 1.1 and 1.2 for the XB270HU.  I'm encountering the same problem in Fedora 22 Linux-x86_64 using the NVIDIA 352.30 drivers.

     

    Everything works great at 59.95 Hz, but there's no option to go up to 144 Hz.  However, the monitor has no problems with 144 Hz under Windows 7.

     

    GL_RENDERER = GeForce GTX 660 Ti/PCIe/SSE2
    GL_VERSION = 4.5.0 NVIDIA 352.30
    GL_VENDOR = NVIDIA Corporation

     

    Linux Kernel 4.1.2-200.fc22.x86_64

     

    Display Device Information:

    Chip Location: Internal

    Signal: DisplayPort

    Connection Link: 4 lanes @ 2.70 Gbps

    Refresh Rate: 59.95 Hz

     

     

  • voor
    voor Member Posts: 2 New User

    I figured out the problem.

     

    You need to explicitly change the resolution off "Auto" (nvidia-auto-select) and manually set it to 2560x1440.  This will allow you to change the refresh rate to 144 Hz, or 2560x1440_144 mode.

     

    Before on AutoAfter manually defining

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