I have a Xiaomi 34" monitor with a 144Hz refresh rate and a resolution of 3440x1440, and I'm experiencing some weird flickering and artifacting issues. I've done quite a bit of troubleshooting already: I tested a different HDMI cable across three different laptops running Windows 10, Windows 11, and Debian 12. I also reset the monitor to factory settings and played around with HDR, Adaptive Sync, and various power modes. I opened the monitor to check for any loose ribbon cables, but everything looks fine. The artifacts only show up a few seconds after the monitor has been turned on from rest mode, and they aren't consistent. Interestingly, when using Debian 12 at 1920x1080 and 120Hz, it initially seems to work without any artifacts for a while, but then they randomly come back. I thought it might be overheating, so I set up a fan blowing on it, but the issue continues. I'm looking for any insights or suggestions on what could be causing this problem!
3 Answers
Have you checked if the flickering occurs when you're playing both streamed content and from a physical source? It might help narrow down the issue. If it appears with both, it could point towards a panel issue rather than the GPU since you've already tested three different ones.
Just a heads-up, be careful with any BIOS changes or disk adjustments. Always back up your data first! That way, you won't lose anything important if something goes wrong. Might not be directly related to your monitor issue, but it's good practice.
It sounds frustrating! Since you mentioned the artifacts show up even when nothing is connected, it does lean towards a potential panel problem. These things can happen, but it might be worth contacting a professional for a check-up. It could save you time in the long run.
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