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HDMI signal issues Xubuntu 14.10

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Algirdas Mazhasai's picture
Starter
Algirdas Mazhasai

Mar 30, 2015 - 05:56am

  • Hello,

    I'm trying to have triple display on my Xubuntu 14.10. My MB has 3 connections: vga, dvi, hdmi. Connecting two Dell monitors on VGA and DVI works without problems. But when I try to connect TV on HDMI starts some interesting stuff. When booted Xubuntu, TV says "No signal" (tried 3 different HDMI cables, same result), but when I connect any monitor to HDMI - all three displays works as expected, with same 3 HDMI cables I tried with TV. When booted to Windows 8.1 - TV (HDMI) and other 2 displays (VGA and DVI) works also as expected. Looks like somehow Xubuntu does not want to work with particular TV. Xrandr says, that HDMI is not connected.Is there anything I can do, to enable TV on HDMI with Intel card and 1.0.8 drivers?

    Some tech. info:

    mazhasai@Mazhasai:~$ lspci | grep VGA
    00:02.0 VGA compatible controller: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller (rev 06)


    mazhasai@Mazhasai:~$ xrandr
    Screen 0: minimum 8 x 8, current 3840 x 1080, maximum 32767 x 32767
    HDMI1 connected 1920x1080+1920+0 (normal left inverted right x axis y axis) 475mm x 267mm
       1920x1080      60.0*+
       1280x1024      75.0     60.0  
       1152x864       75.0  
       1024x768       75.1     60.0  
       800x600        75.0     60.3  
       640x480        75.0     60.0  
       720x400        70.1  
    HDMI2 disconnected (normal left inverted right x axis y axis)
    VGA1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 475mm x 267mm
       1920x1080      60.0*+
       1280x1024      75.0     60.0  
       1152x864       75.0  
       1024x768       75.1     60.0  
       800x600        75.0     60.3  
       640x480        75.0     60.0  
       720x400        70.1  

     



     

     

     

    Mar 30, 2015 - 05:56am
  • The only thing I can think of is that the TV is returning invalid or nonstandard signalling/data over the HDMI cable, given that your machine can drive other HDMI displays. Do you have any other HDMI sources you can test the TV with? Is there anything relevant-looking in dmesg or Xorg.log when you plug in the TV?

    Mar 31, 2015 - 07:49am
  • TV works with other PC and with PS4. Dmesg or xorg.log doesn't report anything, as if device is not connected at all. xrandr reports HDMI2 as disconnected. (HDMI1 is DVI, and HDMI2 is real HDMI)

    Apr 01, 2015 - 02:38am
  • Does it work if the HDMI cable is already connected before you boot up?
    Does the monitor have an input-selection OSD menu or something whic hcan be manually
    set to DMI? (Just throwing ideas out there now)

    Apr 07, 2015 - 12:59pm