I found that I cannot connect more than 4 devices to my router.
then the kernel speaks
[ 6.278743] usb 1-1.5: new high-speed USB device number 8 using xhci-mtk [ 6.420830] usb 1-1.5: Not enough host controller resources for new device state. [ 6.435818] usb 1-1.5: can't set config #1, error -12
Is this a hardware or software limitation? Can it be changed?