From: "Tõnu Samuel" <tonu@jes.ee>
To: linux-kernel <linux-kernel@vger.kernel.org>
Cc: tonu@jes.ee
Subject: BUG: USB3.0 µPD720200 complains about over-current
Date: Wed, 13 Oct 2010 19:01:09 +0300 [thread overview]
Message-ID: <1286985669.4853.14.camel@x41.itrotid.ee> (raw)
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.
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.
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.
Tõnu
next reply other threads:[~2010-10-13 16:08 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-13 16:01 Tõnu Samuel [this message]
2010-10-13 18:27 ` Tõnu Samuel
2010-10-15 17:12 ` BUG: USB3.0 ?PD720200 " Greg KH
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