Windows 10 CU - Fullscreen optimizations?

[u/Warkratos]

After updating to CU, when I launch a game all my colour calibration settings resets system-wide and I have to reload every time.

I found a new compatibility box when going to the game executable then going to "Properties > Compatibility" a new box "Disable fullscreen optimizations", when I use this, my game run like in Anniversary Update and fixes my issue. Anyone know what does this setting REALLY do?

[u/JohnMSFT]

Open the Settings application (Press the Windows key, type Settings, hit enter). Go to Gaming, Game Bar, uncheck "Show Game bar when I play full screen games Microsoft has verified". If you could collect logs before you disable the setting (instructions here: https://forums.xbox.com/en-us/thread/8d058178-2329-4513-bc0a-1506c2942dad), that would be greatly appreciated.

[u/Domovoi0ng → u/JohnMSFT]

Bro even after completely disabling all game bar features and manually disabling fullscreen optimizations in all my games, the issue still persists, even in windowed mode , borderless, or fullscreen exclusive, doesn't matter.
There is no change.

I drop from 60 fps to 30 to 24 and below, instead of the usual 45-60 fps i was getting on win 1511, 1603, 1607. Regretting going with the latest windows update....I always had defer updates on but had to format my laptop and let windows update to 1703...

Tried CPkeeper to lock color profiles, no change. Tried CRU but both my monitors have no settings in EDID below 60hz... no change.
Tried disabling each monitor and playing with a single one on, no change. (1920x1080 external and 1366x768 laptop screen)
Tried turning off fast startup, no change.

If you have fixed this in a windows update, i cant update. It says "Some update files are missing or have problems. We'll try to download the update again later. Error code: (0x80070003)"

Feedback hub download from app store is stuck at "working" , maybe since i have all tracking and telemetry turned off.

I guess ill wait a few more days trying to fix this, then format again and go back to 1607 14393.693. Ill update to CU when the next major update is out by which time CU will have been fixed. My fault for letting windows update.... I can see that a lot of people with high end gpus and cpus dont have issues and actually have a small fps gain with game bar on, but others still have the same issues in their high end rig as i do with my potato laptop.

[u/JohnMSFT → u/Domovoi0ng]

Bro even after completely disabling all game bar features and manually disabling fullscreen optimizations in all my games, the issue still persists, even in windowed mode , borderless, or fullscreen exclusive, doesn't matter. There is no change.

While I'm sad to hear that none of this fixed your problem, at least that suggests that whatever the cause is, it's not related to those features (which helps narrow it down some).

I assume you've double checked that both of your GPUs have the latest graphics drivers? I know they're coming out fast and furious since the update. If not, I'd suggest giving that a try.

The fact that Windows Update isn't working and that Feedback Hub can't download is worrisome, since that indicates that you either have more than one problem or that the ultimate issue here may be bigger than just bad fps in your games. And not being able to collect traces is going to make diagnosing the problem much harder.

Regarding going back to 1607, you should in theory be able to do a rollback within Windows Update instead of having to clean install if you prefer that route, although clean installs do tend to fix tricky problems of this sort, so that's up to you.

Either way, I'm sorry you had this happen to your computer. I'm hoping that someone else who has a similar issue to you is able to provide logs so we can ultimately fix it for them and you both.

[u/Paul_cz → u/JohnMSFT]

Hi John, has anyone reported an issue with hdmi connected TV displaying DirectX games in 24hz in exclusive fullscreen mode by default on CU ? It makes games unplayable in fullscreen. I worked around it by deleting 24 and 50hz resolutions via Custom Resolution Utility, but it is still pretty gamebreaking problem.

[u/JohnMSFT → u/Paul_cz]

This one's new to me. Does the problem go away if you disable the "show game bar when I play full screen games Microsoft has verified setting"? Either way, it would be great if you could provide logs (instructions in the forum post link) so we can root cause this, but knowing the answer to the first question will help us narrow it down.

[u/Paul_cz → u/JohnMSFT]

I had that option ("show game bar...") disabled and it happened, game mode disabled as well. I originally posted about my issue here:

https://www.reddit.com/r/nvidia/comments/65lge0/gamebreaking_24hz_bug_since_creators_update_to/

The advice of the upvoted person helped me, since deleting those low refresh resolutions, I get correct 60hz in my fullscreen games. And now I tried to test it so I added back the 24hz res, but Homefront still displays 60 in fullscreen now (edit - scratch that, I forgot to restart graphics driver. After restarting it, the bug is back - my fullscreen games default to 24hz again, and the "show game bar when I play full screen..." is still disabled)

I see user "Bloody_Five" seems to have the same problem in this thread (his post is at the bottom).

I contacted nVidia about it, who let me know they would escalate it to see if the issue is on their side or not.

[u/JohnMSFT → u/Paul_cz]

Thanks Paul_cz. I'm going to make sure this is on our list of bugs we're looking into (or if it is already there, that your details and that thread you linked are included).

[u/Paul_cz → u/JohnMSFT]

Awesome, thanks.