Re: Restarting video driver to turn on external vga port

Robert Moskowitz <rgm@xxxxxxxxxxxxxxx> · Sun, 2 Jul 2023 08:19:24 -0400



    On 7/1/23 02:59, Barry wrote:

    
        On 30 Jun 2023, at 18:26, Robert
          Moskowitz <rgm@xxxxxxxxxxxxxxx> wrote:

          
          On 6/30/23 13:13, George N. White
            III wrote:

          
              On Fri, Jun 30, 2023 at 1:19 PM Robert
                Moskowitz <rgm@xxxxxxxxxxxxxxx>
                wrote:
              
                
                   I just rebooted after applying new updates.  In
                    the past, this got the external video going.  Not
                    this time.

                  
                VGA suggests an old monitor, so try to verify that
                  it didn't fail by connecting to another system or
                  playing
                with configuration options until it works.  No
                  point wasting time on a dead or dying monitor that is
                  worth less
                than the cost of proper disposal.

                
          Actually the bottleneck is my KVM which only supports VGA. 
          The monitor works fine when I switch the kvm to another
          system.

        
      In have seen issues with KVMs messing up EDID in tne past.
      Suggest you test by pluging the monitor directly into your
        laptop.
    
    
    My Win10 x140e system works just fine on this KVM right now.  I
    plugged this F38 x140e into the cables the Win10 uses and no
    external video.

    
    So it is either the F38 software that decided to hickup between
    working Tuesday night and then failing Friday morning after many
    suspend/resume cycles while on the road.

    
    Or the hardware died.  That is an option to test as I have another
    x140e that has F35 on it.  "All I need to do" is shut down, move
    drive and memory, power up and see what happens.   Yeah, that is
    all....

    
    So first try and see if it is software as this is not the first time
    for this.  I would have it rather frequently on F35, but worst case
    a reboot took care of it.  That did not happen here (i.e. rebooting
    restoring external monitor).

    
                "xrandr --query"
                      may have some useful info.
              
            
          # xrandr --query

          -bash: xrandr: command not found

        
                Check "inxi
                    -Fzx" for missing graphics hardware.
              
            
          # inxi -Fzx

          -bash: inxi: command not found

        
      FYI
        to install a command you can do this:
      

      $
        sudo dnf install /usr/bin/xrandr
      $
        sudo dnf install /usr/bin/inxi
      Etc.
      

                  There should be details in "sudo journalctl -b N"
                  

                (sudo gives details that are not included when run
                  as regular user).   Look at a boot that worked for
                  lines 

                
                related to the external monitor and compare with
                  what is in the latest boot.

                
          That may take for ever.  what file do I grep to look for dates
          when it worked?  I booted the system Monday after a kernel
          install and the video worked fine then.

          
              One thing to watch is EDID -- some older monitors
                have bad data that newer drivers reject.
            
          
          And what is EDID?  And would that come through the KVM?

          
          thanks

          
              -- 

              
                  George N. White III

                    
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