[ltp] T42: USB2 port way too slow

[Eric Van Buggenhaut]

On Sat, Jun 17, 2006 at 05:08:23PM +0200, Tino Keitel wrote:
> On Sat, Jun 17, 2006 at 14:52:56 +0200, Eric Van Buggenhaut wrote:
> > Hi,
> > 
> > My T42 ships with 2 hi-speed USB ports. They're managed boy ehci-hcd 
> > kernel modules, the only ones loaded into memory.
> > 
> > Anyway, I get super slow data transfer rates and I can't understand 
> > why:
> > 
> > It takes 14 min (!!) to transfer 57MB to a USB pendrive (which is also 
> > hi-speed USB):
> 
> Are you sure? Could you look into /proc/bus/usb/devices? If you read
> Spd=12 for your pendrive, it only works at slow USB1.1 speed. Spd=480
> is the faster USB2 speed.

I have this entry:

T:  Bus=01 Lev=01 Prnt=01 Port=02 Cnt=01 Dev#=  4 Spd=480 MxCh= 0
D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=0e21 ProdID=0700 Rev= 1.00
S:  Manufacturer=COWON Systems, Inc.
S:  Product=iAUDIO U3
S:  SerialNumber=06042610282302D9C10000E07DA45D4C
C:* #Ifs= 1 Cfg#= 1 Atr=80 MxPwr= 90mA
I:  If#= 0 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 
Driver=usb-storage
E:  Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms

So this is indeed 480.

-- 
Eric VAN BUGGENHAUT
Eric.VanBuggenhaut@AdValvas.be