On Sunday, 30 June 2024 23:56:40 BST Dale wrote:

Michael wrote:

This is good! :D
Edit the section below by adding the PreferredMode line:

Section "Monitor"

    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "LG Electronics W2253"
    HorizSync       30.0 - 83.0
    VertRefresh     56.0 - 61.0
    Option         "PreferredMode"   "1920x1080_60.00"
    Option         "DPMS"

EndSection

Save it, then check if you get a consistent result when you restart the
DM, or reboot.

If it is still playing up you need to show the Xorg.0.log while the
monitor is working with the nvidia driver, to see which Modeline it uses
and add this in the "Monitor" section too, above the "PreferredMode"
entry.

If none of this works reliably, then you have to capture the EDID table
while the monitor is working, save it in a file and set nvidia-settings
to use it hereafter.  However, if you will NOT be using this monitor for
much longer this would be an exercise only to make you feel good for
beating it into submission!  LOL!

OK.  First time, it worked.  Second time, it came up but in low res. 
Plasma was working to, both times.  So, I opened the Nvidia GUI and told
it to safe a new config with it in hi res mostly just to see what it
would add if anything.  It did.  The only change I could see was it
added metamodes options like this:

Section "Screen"

# Removed Option "metamodes" "nvidia-auto-select +0+0"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "Stereo" "0"
    Option         "nvidiaXineramaInfoOrder" "DP-3"
    Option         "metamodes" "1920x1080 +0+0"
#    Option         "metamodes" "1920x1080 +0+0; 1024x768_60 +0+0"
    Option         "SLI" "Off"
    Option         "MultiGPU" "Off"
    Option         "BaseMosaic" "off"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection


As you can see, I removed the low res part, don't want that anyway, and
it seems to work more often but still fails a lot.  So, I removed the
metamodes Nvidia added.  Then it didn't come up at all, sddm or
anything, when I restarted DM.  I thought it adding your setting to
another section might help.  Guess not.  With the following removed, it
seems to do a little better but still can't depend on it to work.

Section "Screen"
#    Option         "nvidiaXineramaInfoOrder" "DP-3"
#    Option         "metamodes" "1920x1080 +0+0"
#    Option         "metamodes" "1920x1080 +0+0; 1024x768_60 +0+0"

You can add back:

Option         "metamodes" "1920x1080_60 +0+0"

Basically, it is doing like it always has. Most of the time, it doesn't work. Sometimes it does. To be honest tho, I still wonder if it even reads the file. When I change something, I'd expect something different. Generally, it doesn't seem to affect anything unless I reboot completely. Sometimes I'm not sure it does then either. So, I think this old monitor just has a issue. Maybe I need to rebuild some more of the power supply or something in case it is providing bad power to the parts that talks to the puter. Either way, if the new one works, I just don't think this old monitor is going to work correctly no matter what we throw at it.

The last thing left to try is to capture the EDID table with nvidia-settings, configure it to stop trying to load it from the monitor and instead feed the captured file to it. If that doesn't work either, then there is no solution I can think of ...

I will saw this, we threw the kitchen sink at it. I think this is one of the longest threads I've seen in a long while. o_O Dale :-) P. S. Monitor updated. Now it says tomorrow. It's in the right place to do so. It's at the Memphis hub. Usually, it comes from there to the local distribution point and on the truck. They sometimes deliver by noon. Could be a little late given it is Monday.