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Thread: How do I get 5120 1440 resolution on Samsung CRG90 over DisplayPort or HDMI ?

  1. #1
    Join Date
    Oct 2019
    Beans
    3

    Question How do I get 5120 1440 resolution on Samsung CRG90 over DisplayPort or HDMI ?

    Hi,

    MX Linux 18.3 is able to do 5120 x 1440 out of the box on the Samsung 49 inch CRG90 monitor. MX Linux 19, Kubuntu 19.10, and Manjaro 18.1.1 are not able to do 5120 x 1440, they can only do 3840 x 1080. Has anyone figured out why ? Windows (from a laptop) and MX Linux 18.3 (from the same box as Ubuntu) do the 5120 flawlessly over DisplayPort.

    Code:
    # xrandr --delmode DP-2 "5120x1440_30.00"
    xrandr --newmode "5120x1440_30.00" 292.75 5120 5360 5888 6656 1440 1443 1453 1468 -hsync +vsync
    xrandr --addmode DP-2 "5120x1440_30.00"
    xrandr --output DP-2 --mode "5120x1440_30.00"
    I've tried over Display Port and over HDMI.

    I've tried the cvt settings and xrandr but it comes back with an error. (I'll post the error once I log into the Ubuntu box)

    xrandr: Configure crtc 0 failed
    Output on Kubuntu 19.10
    + export rate=30
    + [ 1 -gt 0 ]
    + export rate=30
    + echo rate=30
    rate=30
    + export RESOLUTION=5120 1440 30
    + OUTPUT=DP-2
    + xrandr --current
    + grep -i DP-2
    + cut -f2 -d
    + CONNECTED=connected
    + [ connected = connected ]
    + cvt 5120 1440 30
    + tail -n +2
    + MODELINE=Modeline "5120x1440_30.00" 292.75 5120 5360 5888 6656 1440 1443 1453 1468 -hsync +vsync
    + echo Modeline "5120x1440_30.00" 292.75 5120 5360 5888 6656 1440 1443 1453 1468 -hsync +vsync
    + cut -f 3- -d
    + MODEDATA=292.75 5120 5360 5888 6656 1440 1443 1453 1468 -hsync +vsync
    + echo Modeline "5120x1440_30.00" 292.75 5120 5360 5888+ 6656 1440 1443cut 1453 -f2 1468 -d -hsync +vsync


    + MODENAME="5120x1440_30.00"
    + echo Deleting mode - "5120x1440_30.00" 292.75 5120 5360 5888 6656 1440 1443 1453 1468 -hsync +vsync
    Deleting mode - "5120x1440_30.00" 292.75 5120 5360 5888 6656 1440 1443 1453 1468 -hsync +vsync
    + xrandr --delmode DP-2 "5120x1440_30.00"
    + echo Adding mode - "5120x1440_30.00" 292.75 5120 5360 5888 6656 1440 1443 1453 1468 -hsync +vsync
    Adding mode - "5120x1440_30.00" 292.75 5120 5360 5888 6656 1440 1443 1453 1468 -hsync +vsync
    + xrandr --newmode "5120x1440_30.00" 292.75 5120 5360 5888 6656 1440 1443 1453 1468 -hsync +vsync
    X Error of failed request: BadName (named color or font does not exist)
    Major opcode of failed request: 140 (RANDR)
    Minor opcode of failed request: 16 (RRCreateMode)
    Serial number of failed request: 34
    Current serial number in output stream: 34
    + xrandr --addmode DP-2 "5120x1440_30.00"
    + xrandr --output DP-2 --mode "5120x1440_30.00"
    xrandr: Configure crtc 0 failed
    thanks!
    Last edited by rshetye2; November 2nd, 2019 at 10:50 AM.

  2. #2
    Join Date
    Jan 2010
    Location
    Wheeling WV USA
    Beans
    1,859
    Distro
    Xubuntu 18.04 Bionic Beaver

    Re: How do I get 5120 1440 resolution on Samsung CRG90 over DisplayPort or HDMI ?

    if you type the command:
    Code:
    xrandr|head -n1
    do you get a maximum size info?
    Mask wearer, Social distancer, System Administrator, Programmer, Linux advocate, Command Line user, Ham radio operator (KA9WGN/8, tech), Photographer (hobby), occasional tweeter

  3. #3
    Join Date
    Dec 2014
    Beans
    1,837

    Re: How do I get 5120 1440 resolution on Samsung CRG90 over DisplayPort or HDMI ?

    Did you check whether the display announces its capabilities in the Extended Display Information Data (EDID) ? A simple 'get-edid|parse-edid' should tell you whether the display tells the system what it can do. Since EDID is transmitted through the i2c-bus that's part of all modern display connectors you might need to either be a member of the group 'i2c' or use sudo for the first command of that pipe.

    Holger

  4. #4
    Join Date
    Oct 2019
    Beans
    3

    Re: How do I get 5120 1440 resolution on Samsung CRG90 over DisplayPort or HDMI ?

    Hi, here's the output for
    Code:
    xrandr | head -n1
    Screen 0: minimum 320 x 200, current 3840 x 1080, maximum 16384 x 16384
    Quote Originally Posted by Skaperen View Post
    if you type the command:
    Code:
    xrandr|head -n1
    do you get a maximum size info?

  5. #5
    Join Date
    Oct 2019
    Beans
    3

    Re: How do I get 5120 1440 resolution on Samsung CRG90 over DisplayPort or HDMI ?

    Hi, here's the output. There is no i2c group. Is that ok ? Normal ?

    Also, I think you might be on to something. There's a warning at the end of command output:
    You seem to have too many extension blocks. Will not continue to parse
    Something strange happened. Please contact the author,
    Matthew Kern at <pyrophobicman@gmail.com>
    Code:
    sudo get-edid | parse-edid
    full output:
    This is read-edid version 3.0.2. Prepare for some fun.
    Attempting to use i2c interface
    No EDID on bus 1
    No EDID on bus 2
    No EDID on bus 3
    No EDID on bus 4
    No EDID on bus 6
    2 potential busses found: 0 5
    Will scan through until the first EDID is found.
    Pass a bus number as an option to this program to go only for that one.
    Bus 0 doesn't really have an EDID...
    256-byte EDID successfully retrieved from i2c bus 5
    Looks like i2c was successful. Have a good day.
    You seem to have too many extension blocks. Will not continue to parse
    Something strange happened. Please contact the author,
    Matthew Kern at <pyrophobicman@gmail.com>
    I installed i2c-tools and then I got the following:
    This is read-edid version 3.0.2. Prepare for some fun.
    Attempting to use i2c interface
    Problem requesting slave address: Device or resource busy
    No EDID on bus 1
    No EDID on bus 2
    No EDID on bus 3
    No EDID on bus 4
    Problem requesting slave address: Device or resource busy
    No EDID on bus 6
    Looks like no busses have an EDID. Sorry!
    Attempting to use the classical VBE interface


    Performing real mode VBE call
    Interrupt 0x10 ax=0x4f00 bx=0x0 cx=0x0
    Function supported
    Call successful


    VBE version 300
    VBE string at 0xc94bc "Intel(R) SKL/KBL Mobile/Desktop Graphics Chipset Accelerated VGA BIOS"


    VBE/DDC service about to be called
    Report DDC capabilities


    Performing real mode VBE call
    Interrupt 0x10 ax=0x4f15 bx=0x0 cx=0x0
    Function supported
    Call successful


    Monitor and video card combination does not support DDC1 transfers
    Monitor and video card combination supports DDC2 transfers
    0 seconds per 128 byte EDID block transfer
    Screen is not blanked during DDC transfer


    Reading next EDID block


    VBE/DDC service about to be called
    Read EDID


    Performing real mode VBE call
    Interrupt 0x10 ax=0x4f15 bx=0x1 cx=0x0
    Function supported
    Call successful


    EDID claims 2 more blocks left




    *********** Something special has happened!
    This happens a lot with TV's, and other devices
    with extension blocks. If you have a TV, don't bother.
    Odds are good that I2C will work for you. Try 'modprobe i2c-dev'.
    Otherwise, please contact the author, Matthew Kern
    E-mail: pyrophobicman@gmail.com
    Please include full output from this program (especially that to stderr)






    Reading next EDID block


    VBE/DDC service about to be called
    Read EDID


    Performing real mode VBE call
    Interrupt 0x10 ax=0x4f15 bx=0x1 cx=0x0
    Function supported
    Call successful


    EDID claims 2 more blocks left
    EDID blocks left is wrong.
    Your EDID is probably invalid.
    Reading next EDID block


    VBE/DDC service about to be called
    Read EDID


    Performing real mode VBE call
    Interrupt 0x10 ax=0x4f15 bx=0x1 cx=0x0
    Function supported
    Call successful


    EDID claims 2 more blocks left
    EDID blocks left is wrong.
    Your EDID is probably invalid.
    Looks like VBE was successful. Have a good day.
    You seem to have too many extension blocks. Will not continue to parse
    Something strange happened. Please contact the author,
    Matthew Kern at <pyrophobicman@gmail.com>
    Last edited by rshetye2; November 2nd, 2019 at 11:11 AM.

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