![]() ![]() After cutting his teeth on tech writing at Lifehacker and working his way up, he left as Weekend Editor and transferred over to How-To Geek in 2010. He's been in love with technology since his earliest memories of writing simple computer programs with his grandfather, but his tech writing career took shape back in 2007 when he joined the Lifehacker team as their very first intern. Jason has over a decade of experience in publishing and has penned thousands of articles during his time at LifeSavvy, Review Geek, How-To Geek, and Lifehacker. Prior to that, he was the Founding Editor of Review Geek. Prior to his current role, Jason spent several years as Editor-in-Chief of LifeSavvy, How-To Geek's sister site focused on tips, tricks, and advice on everything from kitchen gadgets to home improvement. He oversees the day-to-day operations of the site to ensure readers have the most up-to-date information on everything from operating systems to gadgets. Jason Fitzpatrick is the Editor-in-Chief of How-To Geek. If you're a wallpaper junkie or really need fine-tooth control over the backgrounds, then we strongly recommend the venerable (and still quite useful) John's Background Switcher (free) or the Swiss Army Knife of multimonitor management, DisplayFusion (the features relevant to wallpaper management are available in the free version). Scenario two: if you want to use multiple and different wallpapers on each of your monitors, and you want a high degree of control over that, then the standard wallpaper options in Windows 10 probably won't cut it. In this scenario, the solution in this article (which is quick and uses Windows' built-in setting) is a perfect one as it's light on system resources. Scenario one: You infrequently change your desktop wallpaper, but you would really like to have a different background on each monitor. You still can use the "Imperfect Method" if you want to, though. Cable quality: does not affect this problem.Since Windows 10 has added an easy, effective way to change your desktop wallpaper, as we outlined above, it isn't necessary to use either of the following methods to change your desktop wallpaper. Vertical monitor incompatibility: I considered this idea, but even in landscape the S2721DGF tends to duplicate the M32Q's wallpaper. I've tried some tricks to persuade Windows to re-number the monitors, none of them worked. Making the M32Q the "1" screen means BIOS shows up on the vertical screen, making the S2721DGF the "1" screen means my actual main screen is numbered "2". Swap GPU inputs: the 3070 Ti and 4070 Ti are interesting in that the BIOS and Windows pick different inputs to be numbered Screen "1". Rolling back to 10 is not an option at the moment. Windows 10 vs 11: bug hasn't always happened even on 11, only in the past few months. Input Auto Select to disabled does not help. Unfortunately, there is no way to disable this "feature" - I have been into the factory service menu as well, there is nothing relevant there that I can see. reaching the lock screen) while the monitor is still transitioning to power saving mode. This seems like it may cause the problem on reboot as the rebooting process is fast enough that display is restored (ie. S2721DGF power saving mode: the S2721DGF has a notorious "quirk" where under some circumstances it very quickly goes into power saving mode upon detecting no signal. The RDNA3 card was slightly better in that it would never display half a wallpaper, but it would still duplicate wallpaper frequently. I can only think of a few culprits but they don't lead me closer to a solution. Using regedit to set wallpaper for each monitor.The fastest way to solve this problem is to cycle the power on the Dell (vertical) monitor whenever the bug happens. Windows Display settings messed up, either thinks there's only 1 monitor, or 2 monitors that are both called "Monitor 2".Secondary monitor wallpaper sometimes cut off (like it's trying to treat the top half of the screen as half of a landscape monitor).Main monitor wallpaper sometimes swapped/duplicated with secondary monitor."Device connected" sound effect plays upon reaching the Windows lock screen. ![]() Sometimes upon a reboot or cold boot, wallpaper on second monitor is all messed up. In the past few months I've been dealing with this multi monitor bug just about every day. I have a M32Q in landscape as my main monitor (1440p 165Hz over DP), and a S2721DGF in portrait to the side (1440p 165Hz over DP). ![]()
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