Well, I spoke to soon.  I shutdown for a while.  When I rebooted, to get the logs you wanted, it started cutting off again like it did before.  It seems it worked that one time but it just wanted to tease me.  :/


Michael wrote:
On Wednesday, 26 June 2024 01:28:47 BST Dale wrote:

Michael wrote:

The above message indicates the same problem you had experienced before
you
reinstalled.  The monitor is not sending its EDID table, or the card can't
read it.

Your Xorg sets a default dummy resolution of 640 x 480, because it can't
find anything connected to the card.

Things I would try, until someone who can grok nvidia contributes better
ideas:

Eliminate the hardware being the cause of the problem, e.g.: try a
different cable, different monitor, then try the same card (with same
drivers and same kernel settings) on your other PC.  If this proves
there's nothing wrong with the cable, card, or kernel settings:

1. Try different ports and restart display-manager each time.

2. Add these two lines at the bottom of /usr/share/sddm/scripts/Xsetup:

xrandr --setprovideroutputsource modesetting NVIDIA-0
xrandr --auto

Again restart display-manager.

3. Add a file /etc/X11/xorg.conf.d/20nvidia.conf

Section "Device"

   Identifier  "nvidia"
   Driver      "nvidia"
   BusID       "PCI:9:0:0"
   Option "UseEDID" "false" ## Try this too ##

EndSection

Again restart display-manager.

Every time you try a setting and it doesn't produce the goods, revert it
before you try the next thing.  Make notes and keep an eye on your logs in
case you spot a difference.

If none of these tweaks work, then you can try capturing the EDID table
and creating a file for the card to load.

[snip ...]

I tried all those in different ways.  Basically, same thing.  The last one did flash me just long enough to see the sddm login screen was low resolution.  




I was
even thinking of moving my main rig monitor to the new rig and see what
it did.  I'd already tried a different card so didn't see any need in
repeating that.  Then I had a thought.  Why is it saying port DP-3?  Why
is it not port DP-0?

Your PC indicated DFP-3 was what it had booted at - from your Xorg.0.log:

[    44.311] (--) NVIDIA(0): Valid display device(s) on GPU-0 at PCI:9:0:0
[    44.311] (--) NVIDIA(0):     DFP-0
[    44.311] (--) NVIDIA(0):     DFP-1
[    44.311] (--) NVIDIA(0):     DFP-2
[    44.311] (--) NVIDIA(0):     DFP-3 (boot)
[    44.311] (--) NVIDIA(0):     DFP-4
[    44.311] (--) NVIDIA(0):     DFP-5
[    44.311] (--) NVIDIA(0):     DFP-6
[    44.311] (--) NVIDIA(0):     DFP-7

which is the display device connector type nvidia identifies the monitor being 
connected to.  However, then it prints this discouraging message:

[    44.312] (--) NVIDIA(GPU-0): 
[    44.332] (--) NVIDIA(GPU-0): DFP-3: disconnected  <== This ===
[    44.332] (--) NVIDIA(GPU-0): DFP-3: Internal TMDS
[    44.332] (--) NVIDIA(GPU-0): DFP-3: 165.0 MHz maximum pixel clock
[    44.332] (--) NVIDIA(GPU-0):

I noticed that too.  I was curious why it was saying disconnected when I didn't.  



        

          
I thought the first port was the one on the
bottom.  Turns out, the top port is the first one.  So, I moved the
cable to the first port, DP-0.


        

        
I thought you had already tried this prior to reinstalling, when I had 
suggested to try different ports.



      

    

    

    I did try another port, just not all of them.  I figured one port
    may be bad.  Surely not more than one tho.  Plus, another card did
    the same thing. 

    

    

      

        

        

          
I booted the rig up, started DM, got the
login screen as usual and guess what was next, a complete desktop.  I
changed it to not power off or switch to a screensaver so that it would
stay on and I could keep a eye on it. I heated up supper, ate, typing
this reply and it is still running, in 1080P no less. 


        

        
YES!  :-D



      

    

    

    NO!!   O_O 

    

    

      

        

        

          
Now tell me this, why would it not work on DP-3 or DP-2 when I tried
those earlier on?  Does one always have to have a monitor connected to
DP-0 first then others as monitors are added? 


        

        
It may have something to do with auto-detecting PNP display devices, like 
DisplayPort monitor devices.  There is a HPD pin (Hot Plug Detect) on the DP, 
which lets the card know if a monitor turns off.  This seems to cause the 
card's driver to detect the display as "disconnected", which then disables the 
port.

The question is why would the monitor turn off.  Well, it might be taking too 
long for the card to walk from DP-1 to DP-3, by which time the monitor has 
gone to sleep to save energy.  If the monitor is on DP-1, then it doesn't get 
a chance to do this.

Alternatively, the Quadro P1000 video card being a 'pro' graphics card may 
have been designed with the assumption a monitor (the primary monitor) is 
*always* connected on the first port, or else the PC is configured as a 
headless server - I don't know really.

I think if you capture and feed manually the EDID table to the card's driver, 
it may work differently - but again, I have no experience with Nvidia.  By 
accident or good fortune I've always had 'linux-friendly' AMD-Radeon cards on 
my PCs.

One thing I have noticed with my DisplayPort monitor, it needs to be powered 
on while the PC boots up/shuts down.  If the monitor is switched off it will 
not get detected after boot and also the shutdown process is cancelled.  :-/




        

          
Now comes the next question.  To move just KDE stuff over, desktop
settings and such.  ~/.local and .config.  Are those the big ones?


        

        
Yes, if we're talking about plasma and kde applications.

You'll also need:

.mozilla
.ssh
.gnupg
.gkrellm2

and others, if you want to keep their settings the same across PCs.


      

    

    

    I was just wanting the basic stuff at first.  Just the desktop
    settings and such.  

    

    

      
<<< SNIP >>>

        

          
I'll copy the other
stuff over at some point but just want to play with the big stuff at the
moment. 

In your list, #1 would have been the fix.  It also turns out, it was
me.  I plugged the cable in the wrong port.  No idea why everything else
worked fine tho.  All the boot media worked just fine.  This is a large
thread over something so simple.  ;-) 


        

        
Well, if I had more experience with Nvidia, or if you tried each and every 
port as I erroneously assumed you had done, it may not have taken this long!  
;-)




        

          
Thanks so much for all the help.  The main rig is still sitting there at
1080P waiting on me.  Finally, after over $1,000 spent, days of
installing, twice, and a lot of testing, a working computer.  :-D  :-D 

Dale

:-)  :-) 


        

        
Could you please send me your Xorg.0.log again with a working and powered up 
monitor, off-list to keep the noise down.  I'd be interested to see what it 
reports now the monitor is connected to DP-1 and initialized correctly.


      

    

    

    I figured out that it wasn't working again when trying to do just
    that.  Since it stopped working again, I'm attaching another log
    that may help.  Pretty sure one shows monitor info that may help. 
    The long one is where it was not working.  Wish I had seen this
    email before I shutdown.  

    

    New thoughts?  Would a new monitor fix this?  I found a good deal on
    one if the monitor is the problem.  From the logs, I think it is the
    monitor as you say.  It may be reporting info at some times but not
    others.  

    

    Dale 

    

    :-)  :-)