Question Color accuracy issue (green tint) on Huawei MateBook X Pro 2024 (OLED) — what can I do?

[Kernel Integrity]

I’m on my third Huawei MateBook X Pro 2024 with an OLED display, and two out of three have had color accuracy issues. At low brightness levels (0-4), dark gray shades develop a green tint. From 5 to 8 brightness, the green tint disappears, and the image becomes more contrasty and slightly warmer. However, from 9 to 14-15 brightness, the green tint gradually returns, and it only fully disappears after reaching around 40 brightness. Interestingly, when lowering the brightness in this range, dark gray shades appear brighter due to the increased green tint (pure black remains black).

Watch attached video.

The first laptop had the same issue, and it was replaced. The second one had a build quality defect, but the display worked fine (maybe it just didn’t last long enough for the color issue to appear) — it was also replaced. The third laptop initially showed normal colors, but after a few hours, the problem returned. Resetting to factory settings using OneKey Recovery didn’t help.

Drivers and BIOS are up to date via Huawei PC Manager and Windows Update. The issue persists on both the old and new BIOS versions. I also tried using the grayscale color profile (EBooks), but the green tint still appears. When connected to an external monitor, the issue isn’t present, but the external monitor doesn’t allow brightness adjustment.

Given that two out of three laptops had the same issue (with the defect manifesting in exactly the same way), it’s unlikely to be a hardware defect. But if it’s a software issue, why didn’t it disappear after the reset? And if it’s a factory calibration defect, why did the displays work perfectly for the first few hours? It’s a mystery.

What can I try to fix this? Has anyone encountered something similar?

 

[Aeacus]

Given that two out of three laptops had the same issue (with the defect manifesting in exactly the same way), it’s unlikely to be a hardware defect.

On the contrary, it actually proves to be hardware issue. Namely the panel issue of the laptop.

But if it’s a software issue

If it would be software issue, you'd see the same green tint on external monitor as well. But since you don't see it, issue is with the laptop's own display panel.

but the external monitor doesn’t allow brightness adjustment.

One option is getting external monitor that allows brightness adjustment on hardware level (i actually doesn't know any that doesn't allow it).

Another option is using different make/model laptop all together. It's not where Huawei is the sole laptop brand out there.

 

[Kernel Integrity]

On the contrary, it actually proves to be hardware issue. Namely the panel issue of the laptop.

How can you explain the fact that during the first few hours of use, the laptop displayed colors correctly, but then the issue appeared? It might be related to Windows updates or driver updates via Huawei PC Manager. However, restoring from the factory image did not solve the problem, and this is already happening with the second unit. Any ideas what could be causing this behavior?

One option is getting external monitor that allows brightness adjustment on hardware level (i actually doesn't know any that doesn't allow it).

I wanted to clarify that the brightness of my old external monitor cannot be adjusted through Windows — only through the monitor's own settings. Additionally, my external display is LCD, not OLED. I checked the image on the external display at low brightness and did not notice any issues with color accuracy.

 

[Aeacus]

How can you explain the fact that during the first few hours of use, the laptop displayed colors correctly, but then the issue appeared?

One possible explanation: panel heats up and develops the hue/tint issue when it is warm enough.

Any ideas what could be causing this behavior?

Either manufacturing fault, or underlying/known issue of the specific panel type that Huawei uses for that laptop.

E.g Corsair Sabre RGB mice has underlying issue, whereby after ~1 year of usage, the left click button will register single clicks as double- and triple clicks. Had that happened with 3x Sabre RGB mice. All three were brand new and two of them were replaced under warranty. After even the 3rd mice developed the same fault, i had enough and went on to Corsair Nightsword RGB mice.

Corsair Nightsword RGB mice has another, different underlying issue. After ~1 year of usage, the middle button (scroll wheel) stops working. Scroll up/down works fine, but pressing the scroll wheel down doesn't register anymore (e.g i use it to open New Tab in my web browser.) It has now happened to 2x different mice. One of them i RMA'd and got replaced under warranty.
Though, i'm currently using the 2nd Nightsword RGB mice but i can work around that fault. Oh, i do have 3rd Nightsword RGB mice as well, brand new, but i haven't had time to switch it out yet.

I wanted to clarify that the brightness of my old external monitor cannot be adjusted through Windows — only through the monitor's own settings.

Newer monitors (probably not all) have dedicated software to control the values via software.

E,g my MSI Optix MAG241CR monitor (VA panel) can be controlled via MSI Gaming OSD software (including brightness among other things) or directly from monitor.
Here's an image of the options that i have available via my monitor control software:

I checked the image on the external display at low brightness and did not notice any issues with color accuracy.

Well, this would indicate that the issue isn't with video signal sent out from the GPU, but instead due to the display.

You can validate it further by;
scroll the brightness level where green tint is seen. Take a screenshot (or record video with OBS Studio) and look the media afterwards. If green hue is seen on screenshot/video as well, then issue would be with GPU (when image is generated). But when media is clean (no green hue), then issue is with the display panel that laptop has.
If you use the laptop display to look the media afterwards, don't forget to set the brightness back where no green is seen.