USB: full-speed hides low-speed devices

USB: full-speed hides low-speed devices

[Paul Dickson]

I have the USB devices listed below.  The hub is built into the keyboard.
I have the USB mouse and a storage device both connected into the
keyboard.

I can access the hard drive for a few short bursts, like ls, and the mouse
continues to work.  But when I copy files to/from the device, or do a du
--total, the mouse no longer works until I unplug and replug in the mouse.

There is no logged activity until I unplug the mouse.

So it appears that the low-speed mouse disappears once heavy traffic
occurs at full-speed.  Is this normal?

This notebook only has one physical USB port to connect everything.  I
don't currently have 2.6 setup on a computer with two USB ports to test
with a separate low-speed connection from the mouse to the computer.

This is 2.6.0-test3.

	-Paul


[root@violet 08:49:13]# cat /proc/bus/usb/devices
 
T:  Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=12  MxCh= 2
B:  Alloc=146/900 us (16%), #Int=  3, #Iso=  0
D:  Ver= 1.10 Cls=09(hub  ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=0000 ProdID=0000 Rev= 2.06
S:  Manufacturer=Linux 2.6.0-test3 uhci-hcd
S:  Product=UHCI Host Controller
S:  SerialNumber=0000:00:07.2
C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr=  0mA
I:  If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   2 Ivl=255ms
 
T:  Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  3 Spd=12  MxCh= 3
D:  Ver= 1.10 Cls=09(hub  ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=0472 ProdID=0065 Rev= 1.00
S:  Manufacturer=Chicony
S:  Product=Generic USB Hub
C:* #Ifs= 1 Cfg#= 1 Atr=a0 MxPwr= 90mA
I:  If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   1 Ivl=255ms
 
T:  Bus=01 Lev=02 Prnt=03 Port=00 Cnt=01 Dev#=  4 Spd=12  MxCh= 0
D:  Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=0472 ProdID=0065 Rev= 1.00
S:  Manufacturer=Chicony
S:  Product=PFU-65 USB Keyboard
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA
I:  If#= 0 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=01 Prot=01 Driver=hid
E:  Ad=81(I) Atr=03(Int.) MxPS=   8 Ivl=24ms
 
T:  Bus=01 Lev=02 Prnt=03 Port=01 Cnt=02 Dev#= 14 Spd=12  MxCh= 0
D:  Ver= 1.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=16 #Cfgs=  1
P:  Vendor=0d7d ProdID=0310 Rev= 1.00
S:  Manufacturer=
S:  Product=Usb Card Adapter
S:  SerialNumber=000140000AA7
C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr=  2mA
I:  If#= 0 Alt= 0 #EPs= 4 Cls=08(stor.) Sub=06 Prot=50 Driver=usb-storage
E:  Ad=82(I) Atr=02(Bulk) MxPS=  64 Ivl=0ms
E:  Ad=02(O) Atr=02(Bulk) MxPS=  64 Ivl=0ms
E:  Ad=81(I) Atr=03(Int.) MxPS=  16 Ivl=255ms
E:  Ad=01(O) Atr=03(Int.) MxPS=  16 Ivl=255ms
 
T:  Bus=01 Lev=02 Prnt=03 Port=02 Cnt=03 Dev#= 12 Spd=1.5 MxCh= 0
D:  Ver= 1.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS= 8 #Cfgs=  1
P:  Vendor=1241 ProdID=1111 Rev= 1.00
C:* #Ifs= 1 Cfg#= 1 Atr=a0 MxPwr=100mA
I:  If#= 0 Alt= 0 #EPs= 1 Cls=03(HID  ) Sub=01 Prot=02 Driver=hid
E:  Ad=81(I) Atr=03(Int.) MxPS=   8 Ivl=8ms
[root@violet 08:50:04]#