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lcgodoy avatar Ubuntu

20.04 + nvidia - monitor not being detected

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lcgodoy

My laptop is an ASUS with motherboard UX430URN and Nvidia GeForce MX150. The kernel I'm using is 5.4.0-96 and the nvidia driver is nvidia-driver-470 (on performance mode, that is prime-select nvidia). Another information that might be important is that Secure boot is not enabled.

Also, xrandr was not detecting the monitor (connected via a Micro HDMI cable). Even when I booted using a bootable USB with an Ubuntu 21.10 or a Pop OS (with NVidia), the monitor (HP M27ha) is not detected. I tried different cables, that was not the problem.

Then, I tried to use my tv (a TCL) as the second screen. Surprisingly, it worked. I looked online and could not find any solution that was working for me. I even tried to switch to lightdm, edit the nvidia-kms.conf file, and so on.

I have also tried to switch the nvidia driver and use the open source driver. Nothing seems to work.

Finally, I solved this problem using the following steps:

  1. Remove all the nvidia drivers installed: sudo apt remove --purge '^nvidia-.*'
  2. Installing the most up-to-date nvidia-driver. In my case, it was nvidia-driver-470: sudo apt install nvidia-driver-470.
  3. Rebooting (reboot).
  4. Now the most surprising part, after following these steps the monitor still was not being detected. Then, I turned it off, plugged the cable, and turned it on again and voila!!

However, when I turned the computer on in the next morning, the monitor was not being detected again.

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ChanganAuto avatar
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ChanganAuto
*Then, I turned it off, plugged the cable, and turned it on again and voila!!* Indeed, some monitors are weird this way. You'll have to use the same method, that's all. And obviously it would have worked as well without uninstalling and reinstalling the exact same Nvidia driver..
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