No USB 2.0 after using an USB 1.1 device

micha · 02-03-2009, 04:03 AM

I have noticed that my USB does not always work reliably. Now have I discovered, that after using the scanner it is not possible to print anything or to use an USB stick. Googling gave me the hint to try a "modprobe -r ehci-hcd" which gave me back the printing function. But copying something on an USB stick runs annoying slow after that.

My assumption now is that in some way the scanner which only runs with USB 1.1 turns off USB 2.0. In the syslog I can find "usb 3-5: device descriptor read/64, error -110" then.

USB 2.0 connectivity returns only after a complete shutdown of the system. A "modprobe ehci-hcd" or a reboot alone does not suffice.

My Linux is Kubuntu 8.04.

Thanks in advance for any hints.

micha

amani · 02-04-2009, 08:11 PM

post relevant part of
#lshw

Also check or post relevant part of system logs/ dmesg

Why don't you unload the module first before modprobe...?

micha · 02-05-2009, 01:33 PM

lshw gives me:

Code:

        *-usb:0
             description: USB Controller
             product: USB 1.1 Controller
             vendor: Silicon Integrated Systems [SiS]
             physical id: 3
             bus info: pci@0000:00:03.0
             version: 0f
             width: 32 bits
             clock: 33MHz
             capabilities: ohci bus_master
             configuration: driver=ohci_hcd latency=32 maxlatency=80 module=ohci_hcd
           *-usbhost
                product: OHCI Host Controller
                vendor: Linux 2.6.24-23-generic ohci_hcd
                physical id: 1
                bus info: usb@1
                logical name: usb1
                version: 2.06
                capabilities: usb-1.10
                configuration: maxpower=0mA slots=3 speed=12.0MB/s
        *-usb:1
             description: USB Controller
             product: USB 1.1 Controller
             vendor: Silicon Integrated Systems [SiS]
             physical id: 3.1
             bus info: pci@0000:00:03.1
             version: 0f
             width: 32 bits
             clock: 33MHz
             capabilities: ohci bus_master
             configuration: driver=ohci_hcd latency=32 maxlatency=80 module=ohci_hcd
           *-usbhost
                product: OHCI Host Controller
                vendor: Linux 2.6.24-23-generic ohci_hcd
                physical id: 1
                bus info: usb@2
                logical name: usb2
                version: 2.06
                capabilities: usb-1.10
                configuration: maxpower=0mA slots=3 speed=12.0MB/s
        *-usb:2
             description: USB Controller
             product: USB 2.0 Controller
             vendor: Silicon Integrated Systems [SiS]
             physical id: 3.3
             bus info: pci@0000:00:03.3
             version: 00
             width: 32 bits
             clock: 33MHz
             capabilities: pm ehci bus_master cap_list
             configuration: driver=ehci_hcd latency=32 maxlatency=80 module=ehci_hcd
           *-usbhost
                product: EHCI Host Controller
                vendor: Linux 2.6.24-23-generic ehci_hcd
                physical id: 1
                bus info: usb@3
                logical name: usb3
                version: 2.06
                capabilities: usb-2.00
                configuration: maxpower=0mA slots=6 speed=480.0MB/s

Is this the "relevant part"? Let me know if anything is missing.

Maybe the explanation of modprobing ehci-hcd was a little misunderstood. Before I did the "modprobe ehci-hcd" I did a "modprobe r ehci-hcd".

Florian