OHCI/EHCI and bad cable message

Hello,
whenever I plug a mouse into my laptop I get this message:

hub 1-0:1.0: Cannot enable port 5.  Maybe the USB cable is bad?

It happens with *any* mouse (which are probably all USB1) but memory
sticks works fine (because I only have USB2 devices here).

It turned out to be an user error, since I "lost" the OHCI module and
only EHCI was enabled. Once OHCI driver is loaded the mouse is
recognized. Still, the message is confusing and suggests a hardware
failure.

The "problem" is not new either (I tried kernels as old as 2.6.17), I
just noticed because previously I was using a PS2 mouse.

It seems that EHCI controller is unable to drive old low speed devices,
is it possible to just ignore them? Or maybe emitting a better
diagnostic message?

Hardware details:

00:03.0 USB Controller: Silicon Integrated Systems [SiS] USB 1.0 Controller (rev 0f) (prog-if 10 [OHCI])
        Subsystem: ASUSTeK Computer Inc. Unknown device 1659
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR- FastB2B-
        Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
        Latency: 32 (20000ns max), Cache Line Size: 32 bytes
        Interrupt: pin A routed to IRQ 9
        Region 0: Memory at e7000000 (32-bit, non-prefetchable) [size=4K]
        Capabilities: [dc] Power Management version 2
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:03.1 USB Controller: Silicon Integrated Systems [SiS] USB 1.0 Controller (rev 0f) (prog-if 10 [OHCI])
        Subsystem: ASUSTeK Computer Inc. Unknown device 1659
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR- FastB2B-
        Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
        Latency: 32 (20000ns max), Cache Line Size: 32 bytes
        Interrupt: pin B routed to IRQ 9
        Region 0: Memory at e6800000 (32-bit, non-prefetchable) [size=4K]
        Capabilities: [dc] Power Management version 2
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME+

00:03.2 USB Controller: Silicon Integrated Systems [SiS] USB 1.0
Controller (rev 0f) (prog-if 10 [OHCI])
        Subsystem: ASUSTeK Computer Inc. Unknown device 1659
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop- ParErr- Stepping- SERR- FastB2B-
        Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
        Latency: 32 (20000ns max), Cache Line Size: 32 bytes
        Interrupt: pin C routed to IRQ 9
        Region 0: Memory at e6000000 (32-bit, non-prefetchable) [size=4K]
        Capabilities: [dc] Power Management version 2
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-

00:03.3 USB Controller: Silicon Integrated Systems [SiS] USB 2.0 Controller (prog-if 20 [EHCI])
        Subsystem: ASUSTeK Computer Inc. Unknown device 165a
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B-
        Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR-
        Latency: 32 (20000ns max)
        Interrupt: pin D routed to IRQ 9
        Region 0: Memory at e5800000 (32-bit, non-prefetchable) [size=4K]
        Capabilities: [50] Power Management version 2
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=375mA PME(D0+,D1-,D2-,D3hot+,D3cold+)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-

Me loading EHCI, plugging the mouse, loading OHCI, plugging the mouse
again (this is 2.6-git-current):

ACPI: PCI Interrupt 0000:00:03.3[D] -> Link [LNKH] -> GSI 9 (level, low) -> IRQ 9
ehci_hcd 0000:00:03.3: EHCI Host Controller
ehci_hcd 0000:00:03.3: new USB bus registered, assigned bus number 1
PCI: cache line size of 64 is not supported by device 0000:00:03.3
ehci_hcd 0000:00:03.3: irq 9, io mem 0xe5800000
ehci_hcd 0000:00:03.3: USB 2.0 started, EHCI 1.00, driver 10 Dec 2004
usb usb1: configuration #1 chosen from 1 choice
hub 1-0:1.0: USB hub found
hub 1-0:1.0: 6 ports detected
hub 1-0:1.0: Cannot enable port 5.  Maybe the USB cable is bad?
hub 1-0:1.0: Cannot enable port 5.  Maybe the USB cable is bad?
hub 1-0:1.0: Cannot enable port 5.  Maybe the USB cable is bad?
hub 1-0:1.0: Cannot enable port 5.  Maybe the USB cable is bad?
ohci_hcd: 2006 August 04 USB 1.1 'Open' Host Controller (OHCI) Driver
ACPI: PCI Interrupt 0000:00:03.0[A] -> Link [LNKE] -> GSI 9 (level, low) -> IRQ 9
ohci_hcd 0000:00:03.0: OHCI Host Controller
ohci_hcd 0000:00:03.0: new USB bus registered, assigned bus number 2
ohci_hcd 0000:00:03.0: irq 9, io mem 0xe7000000
usb usb2: configuration #1 chosen from 1 choice
hub 2-0:1.0: USB hub found
hub 2-0:1.0: 2 ports detected
ACPI: PCI Interrupt 0000:00:03.1[B] -> Link [LNKF] -> GSI 9 (level, low) -> IRQ 9
ohci_hcd 0000:00:03.1: OHCI Host Controller
ohci_hcd 0000:00:03.1: new USB bus registered, assigned bus number 3
ohci_hcd 0000:00:03.1: irq 9, io mem 0xe6800000
usb usb3: configuration #1 chosen from 1 choice
hub 3-0:1.0: USB hub found
hub 3-0:1.0: 2 ports detected
ACPI: PCI Interrupt 0000:00:03.2[C] -> Link [LNKG] -> GSI 9 (level, low) -> IRQ 9
ohci_hcd 0000:00:03.2: OHCI Host Controller
ohci_hcd 0000:00:03.2: new USB bus registered, assigned bus number 4
ohci_hcd 0000:00:03.2: irq 9, io mem 0xe6000000
usb usb4: configuration #1 chosen from 1 choice
hub 4-0:1.0: USB hub found
hub 4-0:1.0: 2 ports detected
usb 3-2: new low speed USB device using ohci_hcd and address 2
usb 3-2: configuration #1 chosen from 1 choice
input: Agiler 3D USB Mouse as /class/input/input7
input: USB HID v1.00 Mouse [Agiler 3D USB Mouse] on usb-0000:00:03.1-2
usb 3-2: USB disconnect, address 2


Luca
-- 
Il dottore mi ha detto di smettere di fare cene intime per quattro.
A meno che non ci siamo altre tre persone.

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