ANOTHER EDIT: I'm not sure how I missed that there were already threads complaining about similar problems recently, lol. Apologies for that, didn't mean to make kind of a "duplicate" post. In any case, I saw the test builds, the last of which did seem to solve the problem for at least some folks in one of those threads. However, when I check the "Check for Beta (newer, unstable) version" checkbox and then click the "check for updates" button again, there's no change - it just says I'm already using the latest version (11.0.5). So, I'm not sure how to get back to using the beta builds. I think there used to be an "Apply" button I could hit after making changes? But it's gone now, the only buttons at the bottom of the DF settings window are Advanced Settings and Close.

Original post:

So I recently finished building a new PC. This is my first time using Windows 11 (been using a Windows 10 PC with DisplayFusion for years now). Last night, I got DF up and running and everything seemed fine until I created a new wallpaper profile and hit the "apply" and "OK" buttons in the wallpaper settings window... nothing happened. The wallpaper didn't change from the default Win11 wallpaper that had been up. Something like 60-90 minutes later, suddenly the wallpaper did finally change to match the profile I had set up in DF (I have 3 monitors and this profile was a different image on each monitor, which is what I usually do for wallpaper).

Today (just a little while ago), I created a 2nd new profile with 3 other images to test this out. Switched to it and again, nothing. The profile that I created last night remains. Right now it's been about 40 minutes since I created the 2nd profile and tried to switch to it.

Is this some kind of weird Windows 11 thing? As I mentioned it's my first time using it. Is there some setting in Windows or in DF that I've missed that needs to be changed to allow DF wallpaper profiles to take effect (aside from having the "allow DF to manage the wallpaper" box checked)?

EDIT: forgot to mention - this might be obvious since it was a brand-new install of everything, but my DF version is 11.0.5 (which is the latest version). On my old PC, I was using the "Beta (newer, unstable) versions" options - I had turned it on a long while ago to help with an issue with DF operations being very slow. I haven't enabled it on the new machine - for now I won't, I'll wait till I get a reply in here to do anything else, let me know if opting back in to the Beta versions would be a good step for this new situation. Thanks!

I'm afraid I must report that the new update (11.0.6, Beta 6) didn't change anything with the wallpaper issue, at least on my PC. Changing the wallpaper still does nothing, the prior wallpaper selection stays on my screens. This is the case whether that is done by bringing up the DF menu in the system tray and selecting a pre-existing wallpaper profile from the "Desktop Wallpaper Settings" menu, OR bringing up the full Desktop Wallpaper window and creating a brand-new wallpaper profile with different pictures and then hitting "Apply" and "Okay".

As I mentioned in the OP, sometimes the wallpaper would eventually change suddenly, an hour or even multiple hours later; for today on Beta 6, I don't know if that's the case or not just yet, as it's been about 1 hour and no change yet.

One other bit of info: I updated to Beta 6 then immediately tried to change my wallpaper. When nothing happened, I restarted my PC. Upon restart, the wallpaper change I had made DID take effect. So a restart does (perhaps unsurprisingly) "force" the wallpaper changes to take effect, despite whatever problem/glitch is going on, but until I restart, no changes will take effect (barring the random "sometimes the changes will suddenly happen hours later" phenomenon). Note also that Display Fusion "thinks" the changes have been applied - if I open the menu and go to "wallpaper", the new wallpaper I selected shows up in the window as if it HAD been properly applied, even though the previous wallpaper is still present on my monitors.

Let me know if you need any further info or logs from within DF, etc.

Log attached. 13:04 (and about 40 seconds) is when I tried to change the wallpaper again by switching wallpaper profiles.

In the wallpaper window, the preview will reflect any changes I make (so it shows "the correct one" as you said, not the old one), but then when hitting apply/OK, the old wallpaper stays on the desktop. I can even re-open the wallpaper window later, and the preview will show the "new" wallpaper that I had tried to apply as if it WAS the current wallpaper, but the old wallpaper remains on the desktop.

Well, I'm afraid I have bad news. I saw the available Beta 7 update before I saw this post - installed it last night and after doing so, everything worked, the wallpaper functionality was back to normal... until today. Really not sure what to make of it. It was all fine last night after Beta 7 was installed, and today, it's back to how it was before, with no wallpaper changes taking effect.

The log is attached; 13:49 should be the time to look at, I changed wallpaper profiles at that moment.

Making a new post so that I can attach a second debug log (and so that it will be clear which is which since each log will be attached to a different post). Restarted my PC a little while after making my previous post, only to see there is already a Beta 8. Installed that, but no change; the wallpaper is still not responding to changes except on PC shutdown or restart. Another debug log is attached; this time, the wallpaper change was attempted at 14:22 (and this was after Beta 8 was installed; the other log in my previous post was while running Beta 7).

I appreciate you guys continuing to look into this. I'm kind of at a loss here - now SOMETIMES it works, but only temporarily. A little while ago, it was suddenly working again. The wallpaper would change immediately whenever I told it to. On a hunch, and honestly because I was kind of expecting it to break again because of the way it's been acting, I turned my PC off then turned it back on, and indeed we're back to the same problem (picture attached just so you can see what this looks like - this is AFTER clicking "apply" and then "okay" in this window to apply the changes and close the window, then re-opening it. You can see Display Fusion "thinks" the new wallpaper HAS been applied, but the previous wallpaper is of course still up).

Could this just be some kind of Windows 11 weirdness? I know 24H2 has broken quite a few things for some users, so maybe it's just another example of that? In any case, I do hope for a solution or fix soon as I change wallpapers frequently and enjoy building themed wallpaper sets for my 3 screens (or at least, I did until this problem started up), though I understand it's a difficult thing to track down so I will try to be patient.

Ahoy! I have a good, but strange, update on this issue, haha.

Since I built this PC in January, I have NOT been using DisplayFusion taskbars. On Windows 10, this feature was essential, because Win10 provides no taskbars for other monitors. Win11 does provide those so I just never turned the option on with my Win11 PC. However, recently, I wondered on a whim if that could somehow help with the "wallpaper won't change" issue. It felt like a long shot... but it worked!

I changed my wallpaper in DisplayFusion, and it refused to change as it has been doing lately, until I turned the DF taskbars on. Then the wallpaper immediately changed. The next time I changed my wallpaper, it changed instantly as it should. Then, as a test, I changed the wallpaper yet again to see what happened... and it was back to not changing. I turned DisplayFusion taskbars back OFF, and again the wallpaper changed instantly.

So, whether DF taskbars are on or off, changing the setting seems to have kicked something back into place, since it (mostly) works now when I change wallpapers. And even if it does still refuse to change every now and then, switching the taskbar setting also causes the wallpaper to behave immediately. It's nice to be back to being able to change my wallpapers without having to restart my PC! And hopefully this information can help you guys with tracking down whatever caused this in the first place, whether it's a problem in DF itself or Windows being Windows and breaking something (frankly I think the latter is the more likely option, lol).