Re: [gentoo-user] new machine : mouse trouble : solved by accident

[Philip Webb <purslow@ca.inter.net>]

120913 Mark Knecht wrote:
> On Thu, Sep 13, 2012 at 1:05 PM, Philip Webb <purslow@ca.inter.net> wrote:
>> When I had switched off & was replugging connections,
>> I found that I'd plugged the mouse into a different USB slot :
>> the previous one -- similar to the one in this machine -- was 2.0/1.1 ,
>> the new one which works is 3.0/2.0 .
> Look at which host controller interfaces you have enabled.
> IIRC USB-3.0 required a new one - probably XHCI but I don't remember.
>   mark@slinky ~ $ zcat /proc/config.gz | grep HCI
>   CONFIG_SATA_AHCI=y
>   # CONFIG_SATA_AHCI_PLATFORM is not set
>   # CONFIG_SATA_ACARD_AHCI is not set
>   CONFIG_USB_ARCH_HAS_OHCI=y
>   CONFIG_USB_ARCH_HAS_EHCI=y
>   CONFIG_USB_ARCH_HAS_XHCI=y
>   CONFIG_USB_XHCI_HCD=y
>   # CONFIG_USB_XHCI_HCD_DEBUGGING is not set
>   CONFIG_USB_EHCI_HCD=y
>   # CONFIG_USB_EHCI_ROOT_HUB_TT is not set
>   # CONFIG_USB_EHCI_TT_NEWSCHED is not set
>   CONFIG_USB_OHCI_HCD=y
>   # CONFIG_USB_OHCI_HCD_PLATFORM is not set
>   # CONFIG_USB_EHCI_HCD_PLATFORM is not set
>   # CONFIG_USB_OHCI_BIG_ENDIAN_DESC is not set
>   # CONFIG_USB_OHCI_BIG_ENDIAN_MMIO is not set
>   CONFIG_USB_OHCI_LITTLE_ENDIAN=y
>   CONFIG_USB_UHCI_HCD=y
>   # CONFIG_PROVIDE_OHCI1394_DMA_INIT is not set

Yes, the 3.4.9 .config has nearly all of those.
However, I'm not sure that your logic is the right way round (smile):
something is telling Kernel + Udev to recognise only a 3.0 mouse,
whereas Mageia/SR recognise a 2.0 mouse ; the mouse is 2012 ,
so perhaps it will function either way, depending on software.
Why would K+U not recognise a 2.0 mouse ?

That also suggests that if I plug a USB stick into those  2  back ports,
it will give faster transfer speed ; the front ports are 2.0/1.1 .
Is it safe to test that ? -- ie I don't want to ruin a stick.

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