[Xiaomi Mi 9 ROMs, Kernels, Recoveries, & Other Dev] the_trev2:
I'm running the latest xiaomi.eu rom(9.7.4), and the latest PE rom (26/06). I'm loving this rom, already pretty optimised and so much better than MIUI :) IMO the main issues for me at the moment are:-

- Android Auto. When disconnecting from the car via USB, the screen will go black. I can press the power button and the screen will briefly flash whatever is on there, and I can feel haptic feedback when pressing the screen, so it seems that the phone is still working, but not pushing any data to the screen itself.

- Auto brightness. This is actually the root of a lot more problems than I thought; there is the main problem that when it's switched on, the screen will reset to 100% brightness after a restart or doze. It doesn't adjust correctly either, so I'm guessing the sensitivity of the light level is heavily skewed. Now, when this is switched off, the ambient display doesn't automatically dim at night (it is supposed to go into extreme dim mode when the room is completely dark, i.e when you're sleeping). Overall it's really needed for a lot of the QoL settings to really work.

- Colour temperature cannot be altered. 2 settings for this; the colour option (Natural, boosted, saturated) doesn't do anything, and LiveDisplay options (colour temperature, reading mode etc.) doesn't work.

- Fingerprint sensor. I know this one is already confirmed, but to elaborate on all the problems gathered; doesn't work on ambient display, dims entire screen when using it anywhere but lock screen, takes a long time to work (2-3 seconds?), very temperamental when it does. Of course, it wasn't great on stock MIUI, I'm beginning to think that the MI 9 just has a really crap sensor.

- Camera :D ANX, portrait + short video doesn't work. the GCam that comes with the phone seems extremely barebones, but the 3rd party Gcam APK doesn't use all lenses. Oddly enough, using all APKs together actually covers all the features :p I'm aware that the 3rd party vendors aren't the problem of the Cepheus PE devs, but it's useful info for people to know going into this if you're thinking about installing the rom.

- I've tried to take a screenshot, but it doesn't show what the problem is; the notification / status bar at the top needs it's information aligned properly. At the moment, there is no gap between the screen edge and the time + battery, due to the curved screen corners. I think all it needs is for 10px padding on each side of the status bar?

- Pocket detection kills the battery, also already known, but is probably lost in this thread.

- I'm not sure how much battery drain it would usually cause, but I kept on "now playing" throughout the night. it drained 12% battery over 8 hours. Seems normal, and tbh I'm going to turn it off during the night, but FYI this could be the cause of drain during the day.

- Wireless charging *might* be bugged, but I need to test more. A couple of times it has showed as charging, but the percentage hasn't gone up. Gonna try and narrow down the cause.

I think that's all the major issues I've found. I still plan on keeping it as my daily driver for the time being, because I've just found MIUI so far deviated from the Android experience that it doesn't feel like I'm using Android anymore. Looking forward to the future of this rom :D