From: pinnerite@gmail.com   
      
   On Thu, 25 Sep 2025 23:18:45 -0400   
   Paul  wrote:   
      
   > On Thu, 9/25/2025 8:30 PM, Paul wrote:   
   > > On Thu, 9/25/2025 5:14 PM, pinnerite wrote:   
   > >> This morning my main computer (this one) came up but only one screen   
   > >> was working.   
   > >>   
   > >> The graphics card has 4 sockets. One HDMI and 3 DisplayPorts. Both my   
   > >> screens use HDMI, so they have adapters. I switched everything round   
   > >> and found both screens worked provided they were plugged into one   
   > >> particular displayport.   
   > >>   
   > >> Checking "Display" in system settings only shows one screen.   
   > >>   
   > >> Just before I clocked off for the night, I thought I would boot up on   
   > >> the Mint 22.1 install flashdrive.   
   > >>   
   > >> To my surprise, delight and consternation both screens came up.   
   > >>   
   > >> Now I need to work out where the fault lies in the software?   
   > >>   
   > >> Suggestions please. :(   
   > >>   
   > >> Alan   
   > >>   
   > >   
   > > xrandr --query   
   > > xrandr --listactivemonitors   
   > >   
   > > readedit ... | parseedid   
   > >   
   > >    Paul   
   > >   
   >   
   > That should be readEDID. As the EDID serial interface on a monitor,   
   > declares the resolution choices of that monitor, and being able   
   > to read the EDID, proves it is connected.   
   >   
   >    Paul   
      
   $ xrandr --query   
   Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 4096 x 4096   
   None-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y   
   axis) 0mm x 0mm   
      
   $ xrandr --listactivemonitors   
   Monitors: 1   
    0: +*None-1 1920/508x1080/286+0+0  None-1   
      
   alan@lakeland:~$ readEDID ... | parseedid   
   readEDID: command not found   
   Command 'parseedid' not found, did you mean:   
     command 'parse-edid' from deb read-edid (3.0.2-1.1)   
   Try: sudo apt install    
   $   
      
   As you can see, completely useless in this situation.   
   I will need to dig deeper, as Google's AI frequently says.   
      
   Alan   
      
   --   
   Linux Mint 22.1 kernel version 6.8.0-84-generic Cinnamon 6.4.8   
   AMD Ryzen 7 7700, Radeon RX 6600, 32GB DDR5, 2TB SSD, 2TB Barracuda   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)