thwe:

On a WD livebook duo using OpenWrt 21.02.1, r16325-88151b8303, i expect power on for a device on plugging in. I like to use backup devices on the USB port and tried an external harddisk and USB-Sticks. None of them are powered on and i can't see any messages in the kernel- or system-log. On power up, an USB device gets power via the port, but after booting the kernel the port seems to be dead.
dmesg shows the following lines related to the USB subsystem (please let me know, if the full log is required):

] usb-regulator GPIO handle specifies active low - ignored
] kmodloader: loading kernel modules from /etc/modules-boot.d/*
] usbcore: registered new interface driver usbfs
] usbcore: registered new interface driver hub
] usbcore: registered new device driver usb
] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
] ehci-fsl: Freescale EHCI Host controller driver
] ehci-platform: EHCI generic platform driver
] uhci_hcd: USB Universal Host Controller Interface driver
] dwc2 4bff80000.usbotg: 4bff80000.usbotg supply vusb_d not found, using dummy regulator
] dwc2 4bff80000.usbotg: 4bff80000.usbotg supply vusb_a not found, using dummy regulator
] dwc2 4bff80000.usbotg: DWC OTG Controller
] dwc2 4bff80000.usbotg: new USB bus registered, assigned bus number 1
] dwc2 4bff80000.usbotg: irq 36, io mem 0x4bff80000
] hub 1-0:1.0: USB hub found
] hub 1-0:1.0: 1 port detected
] usbcore: registered new interface driver usb-storage
] usbcore: registered new interface driver uas
] kmodloader: done loading kernel modules from /etc/modules-boot.d/*