Dear Greg... You are 100% right, of course. In my previous mail (and with the purpose of not making the problem more complex) I did not state that I also prepared a linux-3.3.1 and although it is not fully functional in my board, I was able to test the USB with same results (I think). This is the output of the usbmon: df142200 2048425537 S Ci:1:001:0 s a3 00 0000 0001 0004 4 < df142200 2048425558 C Ci:1:001:0 0 4 = 01010000 df142180 2048457530 S Ci:1:001:0 s a3 00 0000 0001 0004 4 < df142180 2048457537 C Ci:1:001:0 0 4 = 01010000 df142180 2048489537 S Ci:1:001:0 s a3 00 0000 0001 0004 4 < df142180 2048489544 C Ci:1:001:0 0 4 = 01010000 df142180 2048521541 S Ci:1:001:0 s a3 00 0000 0001 0004 4 < df142180 2048521547 C Ci:1:001:0 0 4 = 01010000 df142180 2048521580 S Co:1:001:0 s 23 03 0004 0001 0000 0 df142180 2048521583 C Co:1:001:0 0 0 df8c5f00 2048576623 C Ii:1:001:1 0:2048 1 = 02 df8c5f00 2048576640 S Ii:1:001:1 -115:2048 4 < df142180 2048577540 S Ci:1:001:0 s a3 00 0000 0001 0004 4 < df142180 2048577547 C Ci:1:001:0 0 4 = 03050000 usb 1-1: new high-speed USB device number 2 using fsl-ehci df142180 2048633538 S Co:1:001:0 s 23 01 0014 0001 0000 0 df142180 2048633544 C Co:1:001:0 0 0 df142180 2048638793 S Ci:1:000:0 s 80 06 0100 0000 0040 64 < df142180 2048642860 C Ci:1:000:0 -71 0 df142180 2048642886 S Ci:1:000:0 s 80 06 0100 0000 0040 64 < df142180 2048646858 C Ci:1:000:0 -71 0 df142180 2048646881 S Ci:1:000:0 s 80 06 0100 0000 0040 64 < df142180 2048650858 C Ci:1:000:0 -71 0 df142180 2048650881 S Co:1:001:0 s 23 03 0004 0001 0000 0 df142180 2048650885 C Co:1:001:0 0 0 df142180 2048705535 S Ci:1:001:0 s a3 00 0000 0001 0004 4 < df142180 2048705570 C Ci:1:001:0 0 4 = 03011000 df142180 2048761535 S Co:1:001:0 s 23 01 0014 0001 0000 0 df142180 2048761541 C Co:1:001:0 0 0 df142180 2048761555 S Co:1:001:0 s 23 01 0001 0001 0000 0 df142180 2048761557 C Co:1:001:0 0 0 df142180 2048761578 S Co:1:001:0 s 23 03 0004 0001 0000 0 df142180 2048761580 C Co:1:001:0 0 0 df8c5f00 2048816606 C Ii:1:001:1 0:2048 1 = 02 df8c5f00 2048816613 S Ii:1:001:1 -115:2048 4 < df142180 2048817535 S Ci:1:001:0 s a3 00 0000 0001 0004 4 < df142180 2048817542 C Ci:1:001:0 0 4 = 03050000 usb 1-1: new high-speed USB device number 3 using fsl-ehci df142180 2048873538 S Co:1:001:0 s 23 01 0014 0001 0000 0 df142180 2048873544 C Co:1:001:0 0 0 df142180 2048878789 S Ci:1:000:0 s 80 06 0100 0000 0040 64 < df142180 2048882847 C Ci:1:000:0 -71 0 df142180 2048882872 S Ci:1:000:0 s 80 06 0100 0000 0040 64 < df142180 2048886847 C Ci:1:000:0 -71 0 df142180 2048886869 S Ci:1:000:0 s 80 06 0100 0000 0040 64 < df142180 2048890846 C Ci:1:000:0 -71 0 df142180 2048890870 S Co:1:001:0 s 23 03 0004 0001 0000 0 df142180 2048890874 C Co:1:001:0 0 0 df142180 2048945534 S Ci:1:001:0 s a3 00 0000 0001 0004 4 < df142180 2048945568 C Ci:1:001:0 0 4 = 03011000 df142180 2049001535 S Co:1:001:0 s 23 01 0014 0001 0000 0 df142180 2049001542 C Co:1:001:0 0 0 df142180 2049001556 S Co:1:001:0 s 23 01 0001 0001 0000 0 df142180 2049001558 C Co:1:001:0 0 0 df142180 2049001574 S Co:1:001:0 s 23 03 0004 0001 0000 0 df142180 2049001577 C Co:1:001:0 0 0 df8c5f00 2049056620 C Ii:1:001:1 0:2048 1 = 02 df8c5f00 2049056627 S Ii:1:001:1 -115:2048 4 < df142180 2049057535 S Ci:1:001:0 s a3 00 0000 0001 0004 4 < df142180 2049057542 C Ci:1:001:0 0 4 = 03050000 usb 1-1: new high-speed USB device number 4 using fsl-ehci df142180 2049113537 S Co:1:001:0 s 23 01 0014 0001 0000 0 df142180 2049113543 C Co:1:001:0 0 0 df142180 2049118788 S Co:1:000:0 s 00 05 0004 0000 0000 0 df142180 2049122835 C Co:1:000:0 -71 0 df142180 2049325540 S Co:1:000:0 s 00 05 0004 0000 0000 0 df142180 2049329579 C Co:1:000:0 -71 0 usb 1-1: device not accepting address 4, error -71 df142180 2049538082 S Co:1:001:0 s 23 01 0001 0001 0000 0 df142180 2049538090 C Co:1:001:0 0 0 df142180 2049538110 S Co:1:001:0 s 23 03 0004 0001 0000 0 df142180 2049538113 C Co:1:001:0 0 0 df142180 2049593536 S Ci:1:001:0 s a3 00 0000 0001 0004 4 < df142180 2049593903 C Ci:1:001:0 0 4 = 03051000 usb 1-1: new high-speed USB device number 5 using fsl-ehci df142180 2049649536 S Co:1:001:0 s 23 01 0014 0001 0000 0 df142180 2049649542 C Co:1:001:0 0 0 df142180 2049654786 S Co:1:000:0 s 00 05 0005 0000 0000 0 df142180 2049658810 C Co:1:000:0 -71 0 df142180 2049861539 S Co:1:000:0 s 00 05 0005 0000 0000 0 df142180 2049865677 C Co:1:000:0 -71 0 usb 1-1: device not accepting address 5, error -71 hub 1-0:1.0: unable to enumerate USB device on port 1 df142180 2050074092 S Co:1:001:0 s 23 01 0001 0001 0000 0 df142180 2050074099 C Co:1:001:0 0 0 df142180 2050078911 S Co:1:001:0 s 23 01 0001 0001 0000 0 df142180 2050078914 C Co:1:001:0 0 0 df142180 2050078932 S Ci:1:001:0 s a3 00 0000 0001 0004 4 < df142180 2050078935 C Ci:1:001:0 0 4 = 01010000 Thanks and sorry, Miguel Ángel On Wed, Apr 25, 2012 at 6:50 PM, Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: > On Wed, Apr 25, 2012 at 06:01:47PM +0100, Miguel Ángel Álvarez wrote: >> Dear all, >> >> First of all let me apologize if this question should be done in other >> list. In that case, if anyone can redirect me I would be very >> thankful. >> >> We have designed a board based on Freescale P2020 in which we have >> implemented linux-2.6.32. > > Hm, you do realize just how old and obsolete 2.6.32 really is, right? > It was released 2 1/2 years ago, and 10's of thousands of kernel changes > have happened since then. > > The community will be glad to help you out if you can duplicate the > problem on a modern (i.e. one released recently) kernel, but if you are > stuck on an obsolete kernel like this one, you are going to have to get > support from your vendor who provided you this kernel, there's nothing > we can do about it, sorry. > > best of luck, > > greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html