i have installed the ubuntu 20.04 lts 64Bit OS and i can’t get the external monitor running.
I also tested all available drivers and the prime profile is switched to “performance mode”.
The monitor is working well on Windows 10.
I attached the bug report to hope that someone can told me why it stays black.
Nvidia Quattro M620
I have installed a fresh new version of the Ubuntu OS right now.
It has the same problem.
This is my first Linux OS. Please if you need some more details, then could you give me also the way how i can get these informations for you?
different hdmi cable (Docking station and directly connected to the laptop)
Display Port cable
a mini-dp adapter for hmdi and another one for DP
everytime the same result. The Monitor stays black. I can’t understand why the cable should be a problem, because the same hardware configuration is working with windows 10 very well.
The Source switch when i plugged in the device to the correct input. Yes, i have verified that they match.
How did you see that the gpu and external connectors are on?
The P71 has its gpu on an MXM card which has an on-board vbios prom but also a vbios image embedded into the system bios. The mxm prom contains an outdated minimal vbios but is preferred by the nvidia driver and also nouveau. Nouveau has the option to switch it.
with nouveau drivers: Set driver on Nouveau and add Kernel Paramater “nouveau.config=NvBios=ACPI”
with Nvidia drivers: Set driver on Nvidia and do a Vbios Update.