I have an external 4K monitor that is connected via an legato dock to a MAC 2017 4 port USB-C laptop. When I initially connect the cord from the dock to the MAC Catalina sets the brightness of the Retina display to max even though the setting if for automatically adjust. Each time I connect I need to go in and manually change the brightness setting. This issue did not happen with Mojave or High Sierra.
MacBook Pro 13", macOS 10.15
Well, unfortunately the brightness issue is back for me. Two mornings in a row now where upon waking up my MBP, the brightness on my LG 5k display is back at 100% and I have to adjust it again. It doesn't do it throughout the day but just after sleeping all night. So it seems like 10.15.3 may have improved the problem somewhat but hasn't fixed it altogether. :(
I don't suppose anyone has 10.15.3 beta 3 installed and can provide some feedback on if any of this is fixed there?
Anyone thats been brave enough to try 10.15.3 out there that could offer some feedback? Unfortunately I'm staying at 10.15.1unless there is some thing fixed on .3.
My MacBook Pro (15-inch, 2017) is on 10.15.3 – can confirm the full-brightness issue is still a problem. I don't think I've ever had the saturation issue.
I will occasionally connect my MBP (late 2019 16" model running MacOS 10.15.2) to a Visio D58u-D3, but I'll wake my laptop with the laptop screen appearing to have the wrong color profile or settings (screen colors are either too dark or too bright). I've tried to use the display preferences to the operating system to reload, reset to the standard Color LCD or Color LCD Calibrated profile, but this does not work. The only thing that works to resolve the issue is completely restarting the laptop. So I guess Apple has finally reached the realm of Microsoft where they no longer quickly respond to their customers, leaving them to perform full restarts.... Sigh!!
To everyone else who has been battling this issue by adjusting their external monitor's settings, please be aware that fiddling with your external monitor's settings to compensate for this malfunction of Apple's operating system is just applying a bandage to cancer. You're only temporarily resolving the problem for your external monitor for that one specific instance, but you have to do double the work to readjust or reset your external monitor's settings back after a reboot of your laptop/desktop.
I've noticed that this only appears to be an issue when utilising thunderbolt in my case. aka. An external Apple Cinema monitor or a thunderbolt dock etc. If I use Display Monitor drivers and dock then the screen brightness is normal when connecting.
Catalina Retina Screen brightness issue
