Re: [gentoo-user] Intermittent USB device failures

[Mick]

On Sunday 17 Aug 2014 02:56:58 Mike Edenfield wrote:

> When I `modprobe -r ochi_pci` while the system is operating normally, I see
> all four modules (ohci-pci, ohci-hcd, ehci-pci, and ehci-hcd) unloading
> properly:
>
> [25603.370000] ohci-pci 0000:00:0b.0: remove, state 1
> [25603.370395] usb usb2: USB disconnect, device number 1
> [25603.370414] usb 2-6: USB disconnect, device number 2
> [25603.383451] usb 2-7: USB disconnect, device number 3
> [25603.384217] ohci-pci 0000:00:0b.0: USB bus 2 deregistered
> [25603.384597] ehci-pci 0000:00:0b.1: remove, state 1
> [25603.384611] usb usb1: USB disconnect, device number 1
> [25603.386306] ehci-pci 0000:00:0b.1: USB bus 1 deregistered
>
> If I try to do the same thing after the mouse has locked up, modprobe
> stalls trying to unload the first module:
>
> wombat kutulu # modprobe -r -v ohci_pci
> rmmod ohci_pci
>
> wombat kutulu # dmesg
> [38091.627389] ohci-pci 0000:00:0b.0: remove, state 1
> [38091.627400] usb usb2: USB disconnect, device number 1
>
> Any ideas what's going wrong here? Any chance I can salvage this hardware?

Do you need ohci-pci?  Have you tried running a kernel without it and check if 
your hardware still works as intended?

-- 
Regards,
Mick