On connect:

[  709.453125] musb_stage0_irq 570: VBUS_ERROR in a_wait_bcon (91, <VBusValid), retry #1, port1 00000100
[  709.718750] musb_stage0_irq 646: CONNECT (a_host) devctl 5d
[  709.742187] hub 1-0:1.0: state 8 ports 1 chg 0000 evt 0000
[  709.742187] usb usb1: usb auto-resume
[  709.742187] usb usb1: finish resume
[  709.742187] hub 1-0:1.0: hub_resume
[  709.765625] hub 1-0:1.0: port 1, status 0101, change 0001, 12 Mb/s
[  710.187500] hub 1-0:1.0: debounce: port 1: total 100ms stable 100ms status 0x101
[  710.250000] musb_stage2_irq 776: DISCONNECT (a_host) as Host, devctl 19
[  710.312500] usb 1-1: new high speed USB device using musb_hdrc and address 2
[  710.367187] musb_stage0_irq 646: CONNECT (a_host) devctl 5d
[  710.421875] usb 1-1: device descriptor read/64, error -19

Followed by a loop of:

[  874.843750] hub 1-0:1.0: hub_suspend
[  874.843750] musb_bus_suspend 2136: trying to suspend as a_host is_active=1
[  874.843750] usb usb1: suspend fail, err -16
[  874.843750] usb usb1: 'global' suspend -16
[  874.843750] hub 1-0:1.0: activate --> -108
[  874.843750] hub 1-0:1.0: state 7 ports 1 chg 0000 evt 0000
[  874.843750] hub 1-0:1.0: hub_port_status failed (err = -108)