USB Ports not working with CM4

[Pieterv24]

I'm having trouble getting the USB ports to work on my M5P when using the CM4. As stated in the manual I've added the following line to /boot/config.txt dtoverlay=dwc2,dr_mode=host

when running lsusbi get the following output:

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

This does not show the webcam nor the M5P itself. I've also tried to use other usb devices which don't get detected.

output of dmesg | egrep -i "dwc2|usb"

[    0.144738] usbcore: registered new interface driver usbfs
[    0.144811] usbcore: registered new interface driver hub
[    0.144892] usbcore: registered new device driver usb
[    0.145300] usb_phy_generic phy: supply vcc not found, using dummy regulator
[    0.145552] usb_phy_generic phy: dummy supplies not allowed for exclusive requests
[    1.773244] usbcore: registered new interface driver r8152
[    1.773332] usbcore: registered new interface driver lan78xx
[    1.773420] usbcore: registered new interface driver smsc95xx
[    1.775000] usbcore: registered new interface driver uas
[    1.775093] usbcore: registered new interface driver usb-storage
[    1.786533] usbcore: registered new interface driver usbhid
[    1.786559] usbhid: USB HID core driver
[    5.047093] dwc2 fe980000.usb: supply vusb_d not found, using dummy regulator
[    5.056226] dwc2 fe980000.usb: supply vusb_a not found, using dummy regulator
[    5.114668] dwc2 fe980000.usb: DWC OTG Controller
[    5.114732] dwc2 fe980000.usb: new USB bus registered, assigned bus number 1
[    5.114799] dwc2 fe980000.usb: irq 36, io mem 0xfe980000
[    5.115361] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 6.01
[    5.115384] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[    5.115400] usb usb1: Product: DWC OTG Controller
[    5.115413] usb usb1: Manufacturer: Linux 6.1.21-v8+ dwc2_hsotg
[    5.115426] usb usb1: SerialNumber: fe980000.usb
[    5.128312] hub 1-0:1.0: USB hub found

ls -R /sys/ | grep dwc2

dwc2
/sys/bus/platform/drivers/dwc2:
dwc2-unaligned-dma
dwc2
/sys/module/dwc2:
/sys/module/dwc2/drivers:
platform:dwc2
/sys/module/dwc2/holders:
/sys/module/dwc2/notes:
/sys/module/dwc2/sections:
dwc2

Any suggestions of what I can do to resolve this? I'm having no trouble when a CB1 is plugged in.

[DavidvtWout]

I got the exact same problem with a CM4 on a M8P. Only the root hub device shows up (compared to nothing at all when dwc2 was not enabled).

@Pieterv24 Did you find a solution?

[alexvnesta]

same issue here as well. I am thinking it could be a hardware issue?

[alexvnesta]

after re-seating my cm4 a few times, usb started working partially - in my case, this appears to be a hardware issue.