U3219Q USB ports don't work

[ryys]

Hey guys,
today I got my new U3219Q (possibly just for some time, waiting for u2720q to show up in stores...) and after connecting to my M1 MBP with usb-c, usb-a ports in the monitor don't work. I tried all of them (side and bottom ones) with a pendrive and Logitech receiver, nothing. Called Dell but they told me that they only discuss their monitors' functionality with NORMAL COMPUTERS, not Macs...

 

[joevt]

today I got my new U3219Q (possibly just for some time, waiting for u2720q to show up in stores...) and after connecting to my M1 MBP with usb-c, usb-a ports in the monitor don't work. I tried all of them (side and bottom ones) with a pendrive and Logitech receiver, nothing. Called Dell but they told me that they only discuss their monitors' functionality with NORMAL COMPUTERS, not Macs...

Did you select USB-C as the USB upstream source using the display's on screen menu?

Note that using USB-C as the USB upstream source limits the USB ports of the display to USB 2.0 which is good enough for keyboard and mouse but not great for fast USB storage devices.