@designs-by-Lucht recommend to use VA monitor. Best contrast , so real black during night and high white during day. Check this out *Both TN and IPS panels tend to have a contrast ratio around 1000:1, although in my testing I have noted some differences. TN panels tend to have the lowest contrast ratios when calibrated, with an entry-level panel sitting between 700:1 and 900:1 and good panels pushing up to that 1000:1 mark. IPS has a larger range, I’ve seen some as low as 700:1 like TNs, however the very best tend to push up higher than TN, with 1200:1 as the upper range for desktop monitors and some laptop-grade displays reaching as high as 1500:1. Neither TN nor IPS get to the range of VA though. Entry-level VA panels start with a contrast ratio of 2000:1 from those that I’ve tested, with the best easily exceeding 4500:1, although 3000:1 is a typical figure for most monitors. TVs make extensive use of VA panels and there contrast ratios can be even higher. It’s not unusual to see over 6000:1. So if you want deep blacks and high contrast ratios, you’ll need to go with something VA* Source https://www.techspot.com/amp/article/1788-display-tech-compared/

@MadScientist

@hango oh this is really helpful, thank you!

Reading this : https://forum.magicmirror.builders/topic/4684/electron-cpu-usage/245 The last post says that the rotation doesn’t work with the drivers that are standard for Rpi 4. So I would suggest you keep it in landscape mode and rotate it with html/css instead. https://forum.magicmirror.builders/topic/9707/save-performance-when-rotating-screen-e-g-on-raspberry-pi

@yawns Thank you! vcgencmd display_power 0 and vcgencmd display_power 1 worked for me!