Hi Sven,

On 05/10/15 18:50, Sven Bock wrote:
> Hello, 
> 
> I do not manage to enable my USB or ethernet ports on my beagleboard xm rev 
> C. The D14 Led is off. I use an external power supply of 5V 4A.
> 
> I installed Ubuntu 14.04 according to:
> http://elinux.org/BeagleBoardUbuntu
> This one boots into a command line.
> 
> I also tried it with the production image:
> http://elinux.org/Beagleboard:BeagleBoard-xM
> This one correctly boots the graphical interface
> 
> All usb ports, as well as the ethernet are dead.
> I successfully managed connecting with a USB to serial adapter to the 
> beagleboard. So I actually have a terminal and be able to type!
> According to the linux configuration parameters below for USB, the ports are 
> enabled.
> /sys/bus/usb/devices/usb1/power/autosuspend_delay_m
> /sys/bus/usb/devices/usb1/power/control 
> 
> Is there a beagleboard specific configuration I have missed? 
> Do I need a uEnv.txt in the boot partition to power up the usb and ethernet 
> during boot? If yes, what is the essential code for enabling the usb and 
> ethernet?

You don't need any uEnv. All you need in the kernel is the USB EHCI drivers.

CONFIG_USB_EHCI_HCD=y
CONFIG_USB_EHCI_HCD_OMAP=y

You will also need the TWL PMIC GPIO driver
CONFIG_GPIO_TWL4030=y
> 
> Should they be working by default after flashing the image? 
> Could that be just a configuration problem or more a hardware issue?

led D14 must turn ON when USB hub is powered. Looks like the software
isn't turning on power for the USB hub so I wouldn't suspect hardware yet.

> 
> Any hint, what is going on with my board is greatly appreciated.

Can you please paste your kernel boot log in pastebin and the output of
        cat /sys/kernel/debug/gpio

cheers,
-roger

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