Find the answer to your Linux question:
Results 1 to 2 of 2
Enjoy an ad free experience by logging in. Not a member yet? Register.
  1. #1

    multiple usb ports on hardware only one seems to be active


    Hardware:
    Dell C800, 512MB, 30 GB

    Kernel 2.4.21-4.EL (Redhat Enterprise Linux)

    The system is running fine, but it only seems to recognize one of the usb ports on the machine.

    I can move things between the 2 ports and only when things are connected to the first port do they seem to be active as I can see an indication on the external device (rs-232 serial port). I can swap the devices between the 2 ports and the active device stays active on the bottom most port, never is active on the top port.

    I don't know how to enable the second usb port.
    Do I need to do something or should the default kernel support multiple usb ports?

    /proc/tty/driver
    usbserinfo:1.0 driver:v1.4
    0: module:mct_u232 name:"Magic Control Technology USB-RS232" vendor:050d product:0109 num_ports:1 port:1 path:usb-00:1f.2-2

    /proc/bus/usb
    T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 2
    B: Alloc= 0/900 us ( 0%), #Int= 0, #Iso= 0
    D: Ver= 1.00 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
    P: Vendor=0000 ProdID=0000 Rev= 0.00
    S: Product=USB UHCI Root Hub
    S: SerialNumber=dce0
    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= 8 Ivl=255ms
    T: Bus=01 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#= 2 Spd=12 MxCh= 0
    D: Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=16 #Cfgs= 1
    P: Vendor=050d ProdID=0109 Rev= 1.02
    S: Manufacturer=Belkin USB PDA Adapter
    S: Product=Belkin Components
    S: SerialNumber=399272
    C:* #Ifs= 1 Cfg#= 1 Atr=a0 MxPwr=100mA
    I: If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=serial
    E: Ad=81(I) Atr=03(Int.) MxPS= 2 Ivl=2ms
    E: Ad=82(I) Atr=03(Int.) MxPS= 64 Ivl=1ms
    E: Ad=02(O) Atr=02(Bulk) MxPS= 16 Ivl=0ms

  2. #2

    multiple usb ports on hardware only one seems to be active

    Turns out to be a hardware problem. The system doesn't work with Windoze either. So I had to grab a second laptop and it works fine with the standard configuration. Here is what the running configs show now that is working system.

    /proc/tty/driver/usb-serial
    usbserinfo:1.0 driver:v1.4
    0: module:mct_u232 name:"Magic Control Technology USB-RS232" vendor:050d product:0109 num_ports:1 port:1 path:usb-00:1f.2-1
    1: module:mct_u232 name:"Magic Control Technology USB-RS232" vendor:050d product:0109 num_ports:1 port:1 path:usb-00:1f.2-2

    /proc/bus/usb/devices
    T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=12 MxCh= 2
    B: Alloc= 0/900 us ( 0%), #Int= 0, #Iso= 0
    D: Ver= 1.00 Cls=09(hub ) Sub=00 Prot=00 MxPS= 8 #Cfgs= 1
    P: Vendor=0000 ProdID=0000 Rev= 0.00
    S: Product=USB UHCI Root Hub
    S: SerialNumber=dce0
    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= 8 Ivl=255ms
    T: Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#= 2 Spd=12 MxCh= 0
    D: Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=16 #Cfgs= 1
    P: Vendor=050d ProdID=0109 Rev= 1.02
    S: Manufacturer=Belkin USB PDA Adapter
    S: Product=Belkin Components
    S: SerialNumber=402663
    C:* #Ifs= 1 Cfg#= 1 Atr=a0 MxPwr=100mA
    I: If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=serial
    E: Ad=81(I) Atr=03(Int.) MxPS= 2 Ivl=2ms
    E: Ad=82(I) Atr=03(Int.) MxPS= 64 Ivl=1ms
    E: Ad=02(O) Atr=02(Bulk) MxPS= 16 Ivl=0ms
    T: Bus=01 Lev=01 Prnt=01 Port=01 Cnt=02 Dev#= 3 Spd=12 MxCh= 0
    D: Ver= 1.10 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=16 #Cfgs= 1
    P: Vendor=050d ProdID=0109 Rev= 1.02
    S: Manufacturer=Belkin USB PDA Adapter
    S: Product=Belkin Components
    S: SerialNumber=399272
    C:* #Ifs= 1 Cfg#= 1 Atr=a0 MxPwr=100mA
    I: If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=serial
    E: Ad=81(I) Atr=03(Int.) MxPS= 2 Ivl=2ms
    E: Ad=82(I) Atr=03(Int.) MxPS= 64 Ivl=1ms
    E: Ad=02(O) Atr=02(Bulk) MxPS= 16 Ivl=0ms

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •