linux-kernel - Re: [BUG] Loading both ehci-hcd and uhci-hcd drivers causes my printer to fail

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Date:	Mon, 9 Mar 2009 15:12:16 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Maxim Levitsky <maximlevitsky@...il.com>
cc:	Greg KH <greg@...ah.com>, <linux-usb@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>
Subject: Re: [BUG] Loading both ehci-hcd and uhci-hcd drivers causes my
 printer to fail

On Mon, 9 Mar 2009, Maxim Levitsky wrote:

> T:  Bus=02 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  7 Spd=480 MxCh= 0
> D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
> P:  Vendor=03f0 ProdID=4117 Rev= 1.00
> S:  Manufacturer=Hewlett-Packard
> S:  Product=HP LaserJet 1018
> S:  SerialNumber=KP06J6V
> C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr= 98mA
> I:* If#= 0 Alt= 0 #EPs= 2 Cls=07(print) Sub=01 Prot=02 Driver=(none)
> E:  Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> E:  Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
> 
> T:  Bus=02 Lev=01 Prnt=01 Port=03 Cnt=02 Dev#=  2 Spd=480 MxCh= 0
> D:  Ver= 2.00 Cls=ef(unk. ) Sub=02 Prot=01 MxPS=64 #Cfgs=  1
> P:  Vendor=064e ProdID=a101 Rev= 1.00
> S:  Manufacturer=SuYin
> S:  Product=Acer CrystalEye webcam
> S:  SerialNumber=CN0314-OV03-VA-R02.00.00
> C:* #Ifs= 2 Cfg#= 1 Atr=80 MxPwr=500mA
> A:  FirstIf#= 0 IfCount= 2 Cls=0e(video) Sub=03 Prot=00
> I:* If#= 0 Alt= 0 #EPs= 1 Cls=0e(video) Sub=01 Prot=00 Driver=uvcvideo
> E:  Ad=83(I) Atr=03(Int.) MxPS=  16 Ivl=4ms
> I:* If#= 1 Alt= 0 #EPs= 0 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideo
> I:  If#= 1 Alt= 1 #EPs= 1 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideo
> E:  Ad=81(I) Atr=05(Isoc) MxPS= 128 Ivl=125us
> I:  If#= 1 Alt= 2 #EPs= 1 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideo
> E:  Ad=81(I) Atr=05(Isoc) MxPS= 256 Ivl=125us
> I:  If#= 1 Alt= 3 #EPs= 1 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideo
> E:  Ad=81(I) Atr=05(Isoc) MxPS= 800 Ivl=125us
> I:  If#= 1 Alt= 4 #EPs= 1 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideo
> E:  Ad=81(I) Atr=05(Isoc) MxPS=1600 Ivl=125us
> I:  If#= 1 Alt= 5 #EPs= 1 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideo
> E:  Ad=81(I) Atr=05(Isoc) MxPS=2400 Ivl=125us
> I:  If#= 1 Alt= 6 #EPs= 1 Cls=0e(video) Sub=02 Prot=00 Driver=uvcvideo
> E:  Ad=81(I) Atr=05(Isoc) MxPS=3000 Ivl=125us

I wonder...  Does it make any difference if you unplug that webcam, or 
plug it into the other high-speed bus?

Alan Stern

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