Fedora 35/36, plasma does not start with Driver Version: 515.65.01 installed from cuda page

[sandi_ro]

gnome starts on fedora 36, looks like xorg driver sees the monitor disconnected :

Sep 06 18:53:07 fedora /usr/libexec/gdm-x-session[1887]: (II) NVIDIA GLX Module 515.65.01 Wed Jul 20 13:48:42 UTC 2022
Sep 06 18:53:07 fedora /usr/libexec/gdm-x-session[1887]: (II) NVIDIA: The X server supports PRIME Render Offload.
Sep 06 18:53:07 fedora /usr/libexec/gdm-x-session[1887]: (WW) NVIDIA(0): Failed to initialize Base Mosaic! Reason: Only one GPU
Sep 06 18:53:07 fedora /usr/libexec/gdm-x-session[1887]: (WW) NVIDIA(0): detected. Only one GPU will be used for this X screen.
Sep 06 18:53:07 fedora /usr/libexec/gdm-x-session[1887]: (–) NVIDIA(0): Valid display device(s) on GPU-0 at PCI:1:0:0
Sep 06 18:53:07 fedora /usr/libexec/gdm-x-session[1887]: (–) NVIDIA(0): DFP-0
Sep 06 18:53:07 fedora /usr/libexec/gdm-x-session[1887]: (–) NVIDIA(0): DFP-1
Sep 06 18:53:07 fedora /usr/libexec/gdm-x-session[1887]: (II) NVIDIA(0): NVIDIA GPU NVIDIA GeForce GTX 1650 (TU117-A) at PCI:1:0:0
Sep 06 18:53:07 fedora /usr/libexec/gdm-x-session[1887]: (II) NVIDIA(0): (GPU-0)
Sep 06 18:53:07 fedora /usr/libexec/gdm-x-session[1887]: (–) NVIDIA(0): Memory: 4194304 kBytes
Sep 06 18:53:07 fedora /usr/libexec/gdm-x-session[1887]: (–) NVIDIA(0): VideoBIOS: 90.17.77.00.25
Sep 06 18:53:07 fedora /usr/libexec/gdm-x-session[1887]: (II) NVIDIA(0): Detected PCI Express Link width: 16X
Sep 06 18:53:07 fedora /usr/libexec/gdm-x-session[1887]: (–) NVIDIA(GPU-0): DFP-0: disconnected
Sep 06 18:53:07 fedora /usr/libexec/gdm-x-session[1887]: (–) NVIDIA(GPU-0): DFP-0: Internal DisplayPort
Sep 06 18:53:07 fedora /usr/libexec/gdm-x-session[1887]: (–) NVIDIA(GPU-0): DFP-0: 2660.0 MHz maximum pixel clock
Sep 06 18:53:07 fedora /usr/libexec/gdm-x-session[1887]: (–) NVIDIA(GPU-0):
Sep 06 18:53:07 fedora /usr/libexec/gdm-x-session[1887]: (–) NVIDIA(GPU-0): DFP-1: disconnected
Sep 06 18:53:07 fedora /usr/libexec/gdm-x-session[1887]: (–) NVIDIA(GPU-0): DFP-1: Internal TMDS
Sep 06 18:53:07 fedora /usr/libexec/gdm-x-session[1887]: (–) NVIDIA(GPU-0): DFP-1: 165.0 MHz maximum pixel clock
Sep 06 18:53:07 fedora /usr/libexec/gdm-x-session[1887]: (–) NVIDIA(GPU-0):
Sep 06 18:53:07 fedora /usr/libexec/gdm-x-session[1887]: (==) NVIDIA(0):
Sep 06 18:53:07 fedora /usr/libexec/gdm-x-session[1887]: (==) NVIDIA(0): No modes were requested; the default mode “nvidia-auto-select”
Sep 06 18:53:07 fedora /usr/libexec/gdm-x-session[1887]: (==) NVIDIA(0): will be used as the requested mode.
Sep 06 18:53:07 fedora /usr/libexec/gdm-x-session[1887]: (==) NVIDIA(0):
Sep 06 18:53:07 fedora /usr/libexec/gdm-x-session[1887]: (–) NVIDIA(0): No enabled display devices found; starting anyway because
Sep 06 18:53:07 fedora /usr/libexec/gdm-x-session[1887]: (–) NVIDIA(0): AllowEmptyInitialConfiguration is enabled
Sep 06 18:53:07 fedora /usr/libexec/gdm-x-session[1887]: (II) NVIDIA(0): Validated MetaModes:
Sep 06 18:53:07 fedora /usr/libexec/gdm-x-session[1887]: (II) NVIDIA(0): “NULL”
Sep 06 18:53:07 fedora /usr/libexec/gdm-x-session[1887]: (II) NVIDIA(0): Virtual screen size determined to be 640 x 480
Sep 06 18:53:07 fedora /usr/libexec/gdm-x-session[1887]: (WW) NVIDIA(0): Unable to get display device for DPI computation.
Sep 06 18:53:07 fedora /usr/libexec/gdm-x-session[1887]: (==) NVIDIA(0): DPI set to (75, 75); computed from built-in default
nvidia-bug-report.log.gz (293.2 KB)

[generix]

What monitor doesn’t get detected? You’re running a hybrid graphics notebook with the internal monitor connected to the amd gpu.

[sandi_ro]

Yes it is a laptop display. not sure what it means for the software “NVIDIA(GPU-0): DFP-0: disconnected” but my best guess this looks like a possible problem , when starting gnome on xorg, logs lines like “DFP-0: disconnected” does not show up in Xorg log.

[generix]

So the internal panel stays dark ? Please try this:
https://wiki.archlinux.org/title/NVIDIA_Optimus#SDDM
but instead of
xrandr --setprovideroutputsource modesetting NVIDIA-0
use
xrandr --setprovideroutputsource 0 1

[sandi_ro]

My system is using gdm, I think because I used initial workstation live image to setup , then .
So I used the gdm related steps from the link and then replaced the xrandr command as per your note , and now plasma starts and is usable. Thank you .

[sandi_ro]

For fc 35 I had to upgrade to 36 , and then restart the plasma pannels : Alt+F2 run command Konsole then
" killall plasmashell && kstart plasmashell" .