I have new ThinkPad X1 Gen3, with dual boot - Win10 + Ubuntu 20.04. I’m trying to configure an external Asus 28" monitor to work as as extended display in Ubuntu. The monitor is being recognized by the system, but always remains blank. The same setup works fine on Win10. SecureBoot is disabled. I’…

Hi khitrenovich, you should use the PrimaraGPU option in xorg.conf Otherwise, did you have a look here? [image] Black screen after install of nvidia driver ubuntu Linux I am trying to install nvidia-driver (440) on my Ubuntu on my laptop. After a lot of fail…

Yes, I went through the instructions in Black screen after install of nvidia driver ubuntu with no help. Re PrimaryGPU, since I guess this is what you meant - I just googled a bit and did the following, based on https://docs.fedoraproject.org/en-US/quick-docs/how-to-set-nvidia-as-primary-gpu-on-op…

The logs look like the monitor is detected correctly but not added to the screen. Can you disable and reenable it in the monitor manager? The screenshot in your OP was from the internal display.

You mean - from Settings => Displays? I had switched from “Single…” to “Join…” mode couple of times, with no changes either.

Does running xrandr --auto enable it?

Hi again, I was out for the whole week of July 4th, and when I came over today I fount out it started working as expected (even after a reboot). I have no idea what had changed, and I really hope it won’t stop working in the same mysterious way it started… Regards, Anton.

Actually, I was too fast to declare victory :( Both monitors work fine initially after reboot, but the problem reappears after you lock the laptop (either manually or due to inactivity) and then unlock it. Running xrandr --auto has no visible effect, running xrandr without arguments shows both moni…

Quick update - I got totally desperate yesterday night and installed KDE in addition to Gnome, which ruined everything completely. I had to go with fresh Ubuntu install plus all the tweaks (ubuntu-drivers autoinstall + remove nomodeset stuff) and things seem to work fairly well now - at least when …

ThinkPad X1 Gen 3 + Ubuntu 20.04: Blank screen on external monitor

Graphics / Linux Linux

anon1399550 July 2, 2021, 10:34am 2

Hi khitrenovich,

you should use the PrimaraGPU option in xorg.conf
Otherwise, did you have a look here?

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ThinkPad X1 Gen 3 + Ubuntu 20.04: Blank screen on external monitor

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