 Hi!  I was asked to come here by the Linux Saloon Telegram Community to share my problem.  I posted it on the Lubuntu Discourse last night so I'll just paste what I put there, and then add some more.
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 My laptop has a native resolution of 2240x1400 (16:10). When I change the resolution to another 16:10 ratio like 1920x1200 using LXQT Monitor Settings the screen goes black and comes back at the 2240x1400. Same thing when I change the screen resolution with xrandr.
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 I am running a fresh install of Lubuntu 23.10 on a Lenova IdeaPad Flex 5 14ALC7 with a AMD Ryzen 7 5700U with integrated graphics.
 The screen just goes black and when the timer gets to zero, then it returns to the native resolution.  Thanks for replying! 🙏 (re @lubuntu_bot: (matrix) <kc2bez> The change in monitor settings should popup a dialog box that requires you to select yes before the timer gets to 0 or it reverts back to the original setting.)
 Bug report filed. (re @lqlarry: The screen just goes black and when the timer gets to zero, then it returns to the native resolution.  Thanks for replying! 🙏)