Ive used this monitor for about a year and everything about this issue is true. Ive tried different cables and I encountered the same problem. I also upgraded to a 4090 and have the same issue. I also tested other 4k and 2k monitors of other brands with the same cables and none of them have the issue. till this day I have to manually turn on my monitor everytime. If anyone have bought this monitor recently and having the same problem. If you can return it please do it quickly before its too late
Hey guys. I was experiencing the same issues. There is a driver and a firmware update on the ASUS download website. Download Center | Official Support | ASUS Global
Type in the model number for monitor and download and install this driver and firmware update.
The firmware update has instructions in the file. The driver update is a bit more complicated. Download and extract the driver file then open the device manager on your computer and click your monitor. then go to drivers and update them by selecting the file that you extracted. don't auto look for update.
Hope this helps!