On Wed, Oct 13, 2010 at 07:01:09PM +0300, T?nu Samuel wrote: > Hi! > > I know, this is place where only Gods speak and others not. But I am > sure there is something odd I found and someone here can take care of > it. For usb specific stuff like this, try using the linux-usb@xxxxxxxxxxxxxxx mailing list. > In situation when nothing is connected to any USB ports Ubuntu 10.04.1 > stock kernel complains: > spider@spider:~$ zcat /var/log/kern.log.2.gz | grep -i current | head > Sep 29 23:30:12 spider kernel: [ 9.048388] hub 8-0:1.0: over-current > change on port 1 > Sep 29 23:30:12 spider kernel: [ 9.152036] hub 8-0:1.0: over-current > change on port 2 > Sep 29 23:30:12 spider kernel: [ 9.256038] hub 8-0:1.0: over-current > change on port 3 > Sep 29 23:30:12 spider kernel: [ 9.360037] hub 8-0:1.0: over-current > change on port 1 > Sep 29 23:30:12 spider kernel: [ 9.464036] hub 8-0:1.0: over-current > change on port 2 > Sep 29 23:30:12 spider kernel: [ 9.570621] hub 8-0:1.0: over-current > change on port 3 > Sep 29 23:30:12 spider kernel: [ 9.672037] hub 8-0:1.0: over-current > change on port 1 > Sep 29 23:30:12 spider kernel: [ 9.776038] hub 8-0:1.0: over-current > change on port 2 > Sep 29 23:30:12 spider kernel: [ 9.880049] hub 8-0:1.0: over-current > change on port 3 > Sep 29 23:30:13 spider kernel: [ 9.984041] hub 8-0:1.0: over-current > change on port 1 > spider@spider:~$ > > This runs forever and makes computer busy forever just running those > messages. I verified same behavior exists with vanilla 2.6.35.7. > Disabling USB3.0 in BIOS turns off problem and all USB2 ports remain to > work. So probably this is xHCI driver who complains. I looked bit around > in source and see it is copied from USB2 code and possibly USB3 has > something different. I've read USB3 can supply more power, so possibly > something here has changed. Do you have the xhci driver loaded for the USB 3.0 controller? > My hardware: > > Motherboard ASUS M4A88T-I Deluxe > http://www.asus.com/product.aspx?P_ID=jGAoIFEziW5sPYy7 > > it has USB3 chip "NEC D720200F1" on it: > http://digi.physic.ut.ee/mw/images/d/de/20100926_digi_007.png > > NEC is joined Renesas, so this is his link for datasheet etc: > http://www2.renesas.com/usb/en/product/upd720200.html > > If you propose patch, I can give him test run. Any xhci developers have an idea? thanks, 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
