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Brightness dims after user login upon KB5030310 installation on a PC with AMD Radeon RX550/550Series
Hi everyone, I would like to report an issue after installing KB5030310 (OS Build 22621.2361) available at https://support.microsoft.com/en-au/topic/september-26-2023-kb5030310-os-build-22621-2361-p...
- I found a temporary solution! Just turn on the HDR then set the "SDR content brightness" slider to minimum, turn off HDR and voila, no more need sleep to have normal brightness. I'm now on 23H2 with RX560.
Not sure if this applies to any of you but my monitor is an LG UltraGear and I was able to fix the issue by going to C:\Windows\System32\spool\drivers\color and deleting ULTRAGEAR.ICM. A driver I installed yesterday had created that file and my issue started after that.
- Hi Rile Zugo, I have just tried that and agree, deleting the monitor colour profile does restore brighness on reboot. However when I recalibrate the monitor again, it goes back to being dim as soon as the calibration is loaded. In doing the test, I noticed that this only happens on my large monitor which is natively an HDR 4K LCD TV on which I have HDR switched off so the colour calibration is sane. On my other monitor which is a normal 8 bit colour monitor, all works perfectly. Perhaps it is only on HDR monitors that there is a problem?
APBX100S Probably. HDR is a messy thing, especially on computers. Also RX 500 series has very shoddy driver support, and everyone in this thread seems to be a 500-series owner.
Not sure how to fix it without forfeiting your calibration, but for me personally the dimness got temporarily fixed when I tried turning HDR on & off with the keyboard shortcut (Win + Alt + B), but it dimmed again right away whenever I opened Windows's Display Settings.
So, if this works for you, having to re-do the keyboard shortcut trick every time you wanna go to the settings could be an okay workaround for the time being until either AMD or Windows fixes the issue.
- Thanks very much RIle Zugo - turning HDR on and off in settings does not work, but the shortcut you mentioned does! So thanks very much and that is much easier than suspending and restarting, so a tolerable workaround until a driver / W11 fix is implemented. I can't use HDR on the main monitor (HDR TV) as my second monitor is not HDR and as I understand from 2022 either both HDR or neither. Plus HDR colour calibration is wayward.
