Hey. I have a 4k 60hz screen connected to a computer with a Quadro P2200.
Screen is black.
Driver version 450.
Kubuntu 18.04
Screen is detected in xrandr with the correct EDID information and resolution. Screen is however black when using Nvidia driver.
Tried on computers running windows and works perfectly. Running a certified 1.4 DP cable and have tried 4-5 different brands ranging from 1.2 to 1.4 DP.
Please upgrade your HWE first https://wiki.ubuntu.com/Kernel/LTSEnablementStack
and posibly disable your intel igpu in bios. Try again, create a new nvidia-bug-report.log if it still doesn’t work.
Found one thing:
If connecting the display though a HP Elite Thunderbolt 3 Hub → USB C → computer. With the same Displayport cable from previous tests connected to the hub the screen works. But this solution does not work since I can’t use a hub in my setup later on.
What might the reason behind this be?
Is the hub not using the NVIDIA driver for graphics?
I’m actually a bit confused by your hardware setup shown in the logs. In your initial log you provided, three diplaylink devices are reported, did you have the dock connected when you created it?
Did you already try connecting it to a different connector on the Quadro?
If your mainboard has a displayport connector, you could also try reenabling the igpu and connect the monitor to it.
Yes. I tried also a different computer running same Ubuntu and Nivida driver. Same issue. Connecting it to the iGPU works if it is not using the driver, so seems to be some sort of problem with the screen + driver.
Its a screen created by HOSIDEN. Screen works with windows with or without nvidia card + nvidias latest driver. but not working on Linux nvidia driver… :/
Just for testing, did you ever disconnect the HP monitor and boot only with the problematic display connected to check whether at least POST and boot messages are displayed?