I have a fresh install of Ubuntu 20.04 on my Acer Aspire V15 Nitro laptop (which has a Geforce GTX 960M). I am running nvidia-460 drivers (recommended). For the most part, I can’t get a second (HDMI) monitor to function. Sometimes, however, it works fine. I had a similar but lesser problem on my pr…

I changed modeset to 0 in /lib/modprobe.d/nvidia-kms.conf, updated initramsfs, and rebooted, but the problem persists (tried both monitors). (I’m assuming downgrading from 460 to the 440 drivers mentioned in that post wouldn’t matter.) Any other suggestions?

Please post the output of sudo cat /sys/module/nvidia_drm/parameters/modeset with modeset=0 and create a new nvidia-bug-report.log.

Output: $sudo cat /sys/module/nvidia_drm/parameters/modeset: N Here’s the new bug log: nvidia-bug-report.log.gz (382.7 KB)

Please post the output of xrandr --verbose while on desktop.

Output attached as a text file: xrandroutput.txt (24.0 KB)

Ok, all your external outputs are connected to the intel igpu, the nvidia gpu has none. You can revert the modeset setting back to 1, the nvidia driver doesn’t have anything to do with the issue. Did you have a monitor connected when you created the bug-report.log and the xrandr output?

[image] generix: Did you have a monitor connected when you created the bug-report.log and the xrandr output? Yes, both times.

Ok, here’s the problem: [ 4.007184] i915 0000:00:02.0: HDMI-A-1: EDID is invalid: the intel driver can’t properly communicate with your monitor. Since you already tried different cables/monitors, I guess the connector is breaking. You might also want to try upgrading your bios.

Ah, so the actual hdmi port itself is failing? Lovely. Will look into the bios upgrade. Thanks for the super-quick help!

Ubuntu 20.04 Second Monitor (Usually) Not Working

Graphics / Linux Linux

generix January 26, 2021, 5:53pm 2

Please see this:
https://forums.developer.nvidia.com/t/ubuntu-18-04-3-blank-screen-at-startup-with-430-drivers-and-gtx-960/107501/2
leads to tearing, though.

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Ubuntu 20.04 Second Monitor (Usually) Not Working

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