After installing nvidia driver on Deepin 20.6 I am unable to see a second screen

I installed deepin 20.6 recently and my laptop has RTX 3060 graphics card. However, I am unable to resolve the issues with a secondary monitor display. At first I was only seeing display on laptop screen but after creating xconfig using a command that Nvidia provided I can see the display on the extended monitor but now the main laptop screen is black.

Please run as root and attach the resulting nvidia-bug-report.log.gz file to your post.

nvidia-bug-report.log.gz (500.3 KB)
Here’s the report

Please delete /etc/X11/xorg.conf, then follow this:

I followed the procedure. It duplicates the laptop screen to the extended monitor and I am unable to change the resolution of the extended monitor. Moreover, half the extended monitor shows black screen.

Please create a new nvidia-bug-report.log in the current state.

nvidia-bug-report.log.gz (342.5 KB)
here’s the report

[     7.425] (EE) modeset(0): [DRI2] No driver mapping found for PCI device 0x8086 / 0x9a60
[     7.425] (EE) modeset(0): Failed to initialize the DRI2 extension.

Don’t exactly know why this is happening, might be that your kernel/firmware/mesa is too old for the 11th gen intel gpu. Is is possible to upgrade that?
Also, please post the output of

sudo cat /sys/module/nvidia_drm/parameters/modeset

I don’t think the update is possible, everything is on its latest version.

Verification Successful

That’s bad. You could try using the liquorix kernel for deepin and then update the firmware manually.

So I was able to fix the issues without the need to do all those steps. Deepin driver manager software resolved the issue.