Hi guys,
I was using a combination of Gumstix overo and TOBI board. A USB HUB with external power was connected to the TOBI, so I can use mouse and keyboard at the same time.
After I updated the uboot (MLO and u-boot.img) recently, the USB port stopped working. During the boot, I captured some information like this :
Waiting for root device /dev/mmcblk0p2... hub 2-0:1.0: unable to enumerate USB device on port 2
After the boot process, I can use SSH from another machine to log in. The following is the dmesg results.
$ dmesg |grep hub usbcore: registered new interface driver hub hub 1-0:1.0: usb_probe_interface hub 1-0:1.0: usb_probe_interface - got id hub 1-0:1.0: USB hub found hub 1-0:1.0: 1 port detected hub 1-0:1.0: standalone hub hub 1-0:1.0: individual port power switching hub 1-0:1.0: no over-current protection hub 1-0:1.0: Single TT hub 1-0:1.0: TT requires at most 8 FS bit times (666 ns) hub 1-0:1.0: power on to power good time: 10ms hub 1-0:1.0: 100mA bus power budget for each child hub 1-0:1.0: local power source is good hub 1-0:1.0: enabling power on all ports hub 1-0:1.0: state 7 ports 1 chg 0000 evt 0000 hub 2-0:1.0: usb_probe_interface hub 2-0:1.0: usb_probe_interface - got id hub 2-0:1.0: USB hub found hub 2-0:1.0: 3 ports detected hub 2-0:1.0: standalone hub hub 2-0:1.0: individual port power switching hub 2-0:1.0: individual port over-current protection hub 2-0:1.0: power on to power good time: 20ms hub 2-0:1.0: local power source is good hub 2-0:1.0: enabling power on all ports hub 2-0:1.0: port 2: status 0501 change 0001 hub 2-0:1.0: state 7 ports 3 chg 0004 evt 0000 hub 2-0:1.0: port 2, status 0501, change 0000, 480 Mb/s hub 2-0:1.0: port 2 not reset yet, waiting 50ms hub 2-0:1.0: unable to enumerate USB device on port 2 hub 2-0:1.0: state 7 ports 3 chg 0000 evt 0004
It is obvious that this is not a hardware problem, because all I changed are just from old MLO, u-boot.bin to new MLO and u-boot.img. The same type of 16GB SD cards were used here. I have already changed the mmcrootfstype type back to ext3 so it can boot. I have checked several previous posts, but they were just facing hardware problems or bugs between different linux kernels.
So does anybody know, is there any other setting I need to fix when I update the two uboot files?
Thanks for your help, Felix