Hi to all. I would just like to share my story about eye strain with new monitors.
For a long time I have been using an Asus K53E laptop with Windows 7, and a very old computer with Geforce 8400GS and a AG Neovo F-417 monitor running Ubuntu. Both configuration caused me no eye strain at all. I did, however, try to run Linux Mint on the laptop. It turned out that the PWM problem was insurmountable, so I let it go because it didn't matter, I was happy with Windows.
About 6 months ago I decided to put together a new PC and switch to Ubuntu 20.04 LTS altogether. I got two monitors, AOC 24P2C and Viewsonic VG2448, and a Nvidia GT 1030 graphics card with HDMI/DVI outputs. To my surprise I immediately felt eye strain from using both monitors. It was my first time using IPS monitors, this super-duper fancy peace of … the sun. I had to reduce brightness/contrast practically to zero. After a day or two I couldn't use the AOC 24P2C monitor anymore. It was to painful. Viewsonic VG2448 with some adjustments was much better. So for about six months or so I was able to do work on Ubuntu "normally" with the Viewsonic monitor. "Normally" means that I did feel a bit more tired, and going back to my ancient laptop was a relief still.
A couple of weeks ago a kernel update and an update of the Nvidia driver to 510.xx caused heavier eye strain on the Viewsonic monitor. So much that my eyelids were totally dry and the "non-yolk part of the eye" that should be white, was red.
I tried installing older Nvidia drivers, but that didn't help. I tried turning on/off dithering, changing color range etc. I tried with much older graphics card, namely Geforce 8400GS and ATI RV515… the same effect. Perhaps, only the ATI one was slightly better because I was using the VGA input. Changing DVI/HDMI/DisplayPort inputs or using adapters had no effect in general.
I hooked up my old monitor F-417 … ha, no eye strain at all. Go figure. But I didn't want to use that.
So … I removed Ubuntu. And installed Windows 10 because I had a fresh copy that was supposed to go on my laptop. At first, the eye strain did not go away. Installing updates didn't help. What did help was installing the drivers for both monitors. Yeah, I wasn't expecting this, but whoosh most of the eye strain went away. Installing the latest Nvidia driver didn't have much effect. Turning the brightness/contrast way down I can use both monitors "normally" again.
Fin.