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unfortunately it was the wrong screen panel model was installed in some machines. they fixed mine by replacing it.

okay, so after 3 weeks, mine is finally on the way back to me. from their fault report, i can see they replaced the display panel to a different model AUO B156HAN08.0 this is the same model the other clevo vendor is using.

glad to know. could you please let us know what bios & vbios version you are on? also it's pretty weird my return arrived earlier than yours, but they are not even repairing it yet. today they told me they are still waiting for a free technician.

🙃 this smiles like vbios issue or you got a free upgrade 😅

well, i suspected that as well. so tried with linux, which got exactly same issue, sliders showed up but the panel didn't change brightness. with eDP panels, the brightness is directly controlled by GPU via eDP signal. if it's indeed OS or driver issue, i wouldn't expect neither windows or linux...

interesting, i thought only RTX 2070 has the problem. could you please check with AIDA64 which display model model you have? thank you

My return arrived on Monday and today they started to process it. I will update if there's any new information.

mine is still one the way back to PCS. haven't hear anything from them yet.

yeah, you need to call them. it took me 30 minutes on hold to get through

oookay, latest news, they asked me to send it back. it's going to take a while.

sure no problem. i did it as customer support also asked for the forum link to send to their technicians to take a look. anyway, PM me for the link if needed.

just called PCS, very professional support personnel. here in germany they will just ask to repeat driver update / os reinstall even you told them it's already done. anyhow, their technician will look into that and give a response later. we discussed about BIOS versions over the phone, the one...

okay, an expert told me that it's very likely to be a EDID mismatch issue, which happens quite often when you replace the panel with a different model. there are some DIY fixes available to it involves flashing either flashing EDID of the panel or flashing VBIOS or BIOS. since those fixes would...

a bit more information i collected which might help with the debugging. so AIDA64 tells that the Nova has a PANDA LM156LF1F02 screen https://www.panelook.com/LM156LF1F02_Panda_15.5_LCM_parameter_44308.html first batch from a competitor had AUO B156HAN08.0 screen. I'm just guessing here, maybe...

since it's weekend, i just tried ubuntu 20.04 as well. same problem as windows, the brightness slider was shown, but it doesn't do anything.

i already tried it. it didn't change brightness 😿

from what i read in a chinese forum, screen brightness is adjustable in BIOS/UEFI interface with the hotkey. if it doesn't change in UEFI interface, it's likely to be a panel issue. :sick:

I suspect it's a hardware issue now. Just opened a ticket with PCS and see what they will say.

FYI, i also tried some older nvdia driver versions, didn't seem to work either.

Yes. Nvidia driver from clevo was installed first, then control center was installed. I also tried official driver from nvdia's website, got the same result.