Can't set to 1366x768 resolution in UDOObuntu 1.0

Discussion in 'Troubleshooting' started by SoundChaos, Dec 4, 2014.

  1. SoundChaos

    SoundChaos New Member

    Joined:
    Oct 29, 2013
    Messages:
    13
    Likes Received:
    0
    Using UDOO Quad on latest UDOObuntu release 1.0, hooked up to an HP w1858 monitor that supports up to 1366x768 resolution via HDMI to DVI cable. the only resolution the monitor settings will let me set is 1280x1024.

    I have tried:
    Code:
    cvt 1366 768 60
    which outputs:
    Code:
    # 1368x768 59.88 Hz (CVT) hsync: 47.79 kHz; pclk: 85.25 MHz
    Modeline "1368x768_60.00"   85.25  1368 1440 1576 1784  768 771 781 798 -hsync +vsync
    
    Then I enter:
    Code:
    sudo xrandr --newmode "1366x768_60.00"  85.25  1368 1440 1576 1784  768 771 781 798 -hsync +vsync
    and I get:
    Code:
    xrandr: Failed to get size of gamma for output default
    X Error of failed request:  BadName (named color or font does not exist)
      Major opcode of failed request:  150 (RANDR)
      Minor opcode of failed request:  16 (RRCreateMode)
      Serial number of failed request:  19
      Current serial number in output stream:  19
    
    Then:
    Code:
    xrandr --addmode default 1360x768_60
    which gives:
    Code:
    xrandr: Failed to get size of gamma for output default
    and finally i type:
    Code:
    xrandr --output default --mode 1366x768_60
    and I get:
    Code:
    xrandr: cannot find mode 1366x768_60
    
    After all of this, i can see 1366x768 in the monitor settings options, but selecting and applying just crashes the settings screen without error, and it stays on 1280x1024
     
  2. ekirei

    ekirei Administrator

    Joined:
    Jun 14, 2013
    Messages:
    78
    Likes Received:
    3
  3. SoundChaos

    SoundChaos New Member

    Joined:
    Oct 29, 2013
    Messages:
    13
    Likes Received:
    0
    In U-Boot via serial connection I just tried:
    Code:
    setenv video mxcfb0:dev=hdmi,1366x768M@60,bpp=32
    saveenv
    But now, after the UDOO splash/info screen, it goes to a black screen, and it still wont come back after:
    Code:
    setenv video mxcfb0:dev=hdmi,1280x1024M@60,bpp=32
    EDIT: I got it working, browsed the HDMI issues forum and used this code in this order:
    Code:
    setenv bootargs console=ttymxc1,115200 root=/dev/mmcblk0p1 rootwait rw fbmem=24M video=mxcfb0:dev=hdmi,1366x768@60,bpp=32
    
    setenv mmcargs setenv bootargs console=ttymxc1,115200 root=/dev/mmcblk0p1 rootwait rw fbmem=24M video=mxcfb0:dev=hdmi,1366x768@60,bpp=32
    
    setenv videomode video=mxcfb0:dev=hdmi,1366x768@60,bpp=32
    
    saveenv
    
    boot
    
    Thanks so much for the help and pointing me to the U-Boot / setenv!
     

Share This Page