PG42UQ Broken 138khz g sync and color depth while using HDMI 2.1

[D_Trump]

In 138hz using hdmi 2.1 the monitor OCD > system setup > information will show you 8 bit color depth regardless of what you have selected in windows/nvidia panel. Also g sync is completely unusable, the monitor goes to black for a few seconds than back to normal again for a few seconds and the loop keeps repeating as long as i have an active window open, it's ok in desktop only.
These problems are not an Issue with dp no matter the refresh rate and it's ok with hdmi 2.1 while being on 120khz.
And while using dp i sometimes see a random rectangle shaped artifact for miliseconds, i assume it's becouse of the lower bandwith of the dp cable, i'm even suprised it manages to do 4k 138hz to begin with, i thought that was impossible.
FW v033
Also is there any news regarding any firmware updates? It's been 3 months since the last one and it's been complete silence.

[WatercoolingWal]

This update is very very nice.
On my side everything is working except that the monitor shows 8 bit at 138Hz even when windows is showing 10 bit.

But those blackscreens, wake up issues/speed and most importantly the HDR performance was fixed in this firmware update.
A little sad that it took nearly 8 months but at least its working now!

[Silent_Scone]

Working link.

https://rog.asus.com/me-en/monitors/above-34-inches/rog-swift-oled-pg42uq-model/helpdesk_bios/

https://www.reddit.com/r/OLED_Gaming/comments/14yjizb/pg42uq_firmware_v040_released/

Feedback welcome

[KneelbfZod]

Working great now! Took longer than it should have, but HDR is finally able to be used!

[bp328i]

With v40 everything seems to be working except 10 bit via HDMI 2.1 while set at 138Hz. Hopefully this isn't a hardware limitation with the monitor. 

[keiko-chan]

Very simple fix. Use DP cable. Its hands down better for PCs. Also, the manual states that VRR (G-sync) does not work when you overclock to 138hz on an HDMI 2.1 cable, VRR only works on DP at 138hz. Although you can use HDMI 2.1 with VRR at 120hz if you're willing to have a bit of screen tearing in gaming for that "better color depth" people claim comes with HDMI2.1 over DP1.4a since it doesn't need DSC (Which I believe is not even true. DSC is visually lossless, and DP has so many more benefits on a PC when compared to HDMI, its just better, regardless of HDMI 2.1 having higher bandwidth). Even Linus Sebastian uses it on his PG42UQ as shown in the video where he sets it up. Heres a screen shot from the manual.