Jl1994

The main goal right now is to eliminate dithering on your graphics cards and ensure that your monitor works well at 8-bit color depth. If you find that working becomes comfortable during any of these tests, your monitor should be fine.

Here are your options:

1. Ubuntu 18: This version likely doesn't support your graphics cards because it's quite old (?). That's why it's recommended for testing. Without support, the driver shouldn't initialize the card or enable dithering. However, there's always a risk that the card might default to dithering. This is the main concern with these step. Start testing with the UHD 770, and if it causes eye strain, switch to the RX 7800 for broader test coverage.

2. Latest Ubuntu: The newest version supports both of your graphics cards, meaning the driver will recognize and initialize them. It's been found that the driver for the UHD 770 doesn't enable dithering at 8-bit or higher, making it potentially safe. However, the situation with the RX 7800 is unclear and depends on the driver. Set the color depth to 8-bit.

3. Windows 10/11: You can use the Microsoft Basic Adapter Driver, which won't enable dithering on the graphics card. You can test here too, but be aware of the same risk mentioned in step 1.

4. Native Driver for UHD 770: Install the native driver instead of the Microsoft Basic Adapter Driver and test again, ensuring that the color depth is set to 8-bit. Use the Ditherig app to disable a dithering on the UHD 770, if eye strain is present. https://kawamoto.no-ip.org/henteko/myapp_en.html

5. Native Driver for RX 7800: Install the native driver instead of the Microsoft Basic Adapter Driver and test again. Use ColorControl to disable dithering on the card. Ensure that the color depth is set to 8-bit.

    moonpie Oh okay my bad about the ubuntu. I just switched over today to dGPU because my computer has been crashing and working poorly in general last days. I play poker for a living and had to try make sure its not crashing when I played today. It's been connected to displayport before today.

      In the latest Ubuntu, by default, you will boot into a Wayland session, where you cannot set the desktop color depth to 8-bit (the architecture there doesn't quite allow for managing this). You need an Xorg session. I'm not sure if you'll be able to select it when booting from a flash drive, but give it a try. On the login page, look for a "gear" icon like this:https://ubuntushell.com/wp-content/uploads/2024/03/switching-to-Xfce-on-ubuntu-1024x576.webp. There should be an option to choose.

      You can switch the desktop color depth to 8-bit like this: https://github.com/WhisperingWindLinux/Guides?tab=readme-ov-file#how-to-switch-to-6-bit-mode.

      If you experience eye strain here, test with Ubuntu 18 (you can start testing from it). See my post above.

      Do I pick ”try or install unbuntu” or ”ubuntu(safe graphics)” in the menu? Picked the first option first time, it just loaded for a long time then my screen turned black. Edit: Tried the other one, doesnt load there either. Isnt there some monitors/cpu/gpus that are confirmed safe by multiple ppl that I can just buy?

      moonpie Yeah I had a lot of issues with freezing/computer crashing when I bought a new computer around 1 year ago. So after a few months I just decided to upgrade to something overkill and see if that would fix it, thats why.

      Is there any way I can chat with 1 of you guys outside of here to try fix it? Maybe on discord? Literally willing to pay. ColorControl 10.1.0.0 For example in here, I have no clue what to do. Also the "ditherig" program didnt wanna open, said something about some dll not loading. Never mind, got the ditherig to work.

      I could also send slow-mo videos taken with my phone and you could check how my screen looks, maybe you'd be able to see if there's something wrong with it.

        moonpie I wouldn't call it trivial, but that's what I was closer to implying.

          I agree with @moonpie. If the laws in your country allow you to return a monitor within a certain period and do not impose restrictions on the monitor being used, then go ahead and test it first. You can simply remove the RX7800 from the slot and test with the UHD 770 in Windows/Linux. Remove the drivers or install the Microsoft Basic Adapter Driver in Windows for UHD 770.

          ColorControl 10.1.0.0 For example in here I have no clue what to do. Also, the "ditherig" program didn't want to open, said something about some DLL not loading. Never mind, got the ditherig to work.

          You should select "Apply on startup" in the line where you disabled dithering. Restart and make sure the necessary line is highlighted in bold.

          it just loaded for a long time then my screen turned black.

          Linux doesn't always work correctly with multi-GPU setups.

          Isnt there some monitors/cpu/gpus that are confirmed safe by multiple ppl that I can just buy?

          It all depends on individual eye sensitivity, which varies for everyone. I use the ASRock Intel Arc A770 Phantom Gaming D OC (A770 PG 16GO). For my eyes, it provides a very comfortable picture in both Linux and Windows 11, with no dithering in either operating system. In terms of comfort, it should be similar to your UHD 770. I suggest trying the UHD 770 first.

          Yeah I had a lot of issues with freezing/computer crashing when I bought a new computer around 1 year ago. So after a few months I just decided to upgrade to something overkill and see if that would fix it, thats why.

          This could be an issue with the PSU or RAM.

            Thank you @WhisperingWind very helpful, appreciate it. I will try this tomorrow(need to play poker today, free from tomorrow): ”Remove the drivers or install the Microsoft Basic Adapter Driver in Windows for UHD 770.” I have 1 week from tomorrow to tell them if I wanna return the monitor, then 2 weeks from then to actually do it.

            WhisperingWind is that the latest Intel driver you use or Microsoft default? Also are you using the latest win11 pro? HDMI or DP?

                moonpie A good start to bisect and find out exactly why autobot believes unsupported and EOL lubuntu 18.04 is "safe." autobot can then create his own "safe" distro (autobot's Eye Safe Linux 24.10) which is up to date and share it here.

                The suggestion to bisect an entire Linux distro across six years of commits is hardly practical. Bisecting the Linux kernel and/or Linux GPU drivers, on the other hand, might be worth exploring.

                EOL operating systems will likely contain vulnerabilities (including serious ones), and the vendors certainly use this as an incentive for you to use their latest version. On the other hand, an OS version with eye strain is a guaranteed threat versus an OS version with vulnerabilities being a potential threat. A sophisticated user who is able to harden or lock down an older operating system, or a user with an offline workload, may be able to mitigate the risks of using an older OS version to an acceptable level, in my view.

                  WhisperingWind "Linux doesn't always work correctly with multi-GPU setups."
                  Will disabling the internal gpu in the BIOS solve such issues?

                      autobot

                      Yes, it will help because the iGPU will be completely turned off.

                      jordan

                      I'm using driver version 32.0.101.5768 (dated July 24, 2024). I downloaded the driver from here: https://catalog.s.download.windowsupdate.com/c/msdownload/update/driver/drvs/2024/09/2ef13455-fce7-468d-aa96-f3cc995fd787_6af9222a1714a6f19139111abe602ba1163cd11b.cab. I didn't install the control panel or change any settings, so all settings are default (8-bit, RGB).

                      Connections: HDMI-HDMI and DP-HDMI. I haven't noticed any difference between them.

                      I am using the latest Linux Ubuntu without any modifications and Windows 11 Home 23H2 (22631.4169).

                          Trying to make sure I’m not using dGPU. Moved the monitor cable to the right slot but just to be sure should I do something inside of the computer? Remove the cable maybe? To completely remove the dGPU from inside I’d need to get a screwdriver. Would moving/removing the cable be enough?

                            Or is there any way to check which gpu its using at the moment to make sure its iGPU?

                            7 days later

                            Jl1994 Hi,
                            How are things going ? have you managed to get acomfortable setup ?

                                dev