Re: PROBLEM: since linux kernel 3.8 Apple Cinema Display's usb hub spits errors randomly at boot.

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On Sat, 16 Mar 2013, Jenya Y wrote:

> Alan, looks like we are not quite there yet, just tried a fresh 3.8.3
> build with both of your patches and here is what I have -
> 
> [    7.797975] usb 1-2.2: can't set config #1, error -19
> [    7.798332] usb 1-2.2: USB disconnect, device number 3
> [    7.799158] usb 2-1: USB disconnect, device number 2
> [    7.801304] usb 2-2: USB disconnect, device number 3
> [    7.813015] hub 2-2:1.0: hub_port_status failed (err = -19)
> [    7.813364] hub 2-2:1.0: unable to enumerate USB device on port 2
> [    7.836270] usb 4-1: USB disconnect, device number 2
> [    7.881036] usb 4-1.3: new full-speed USB device number 3 using uhci_hcd
> [    7.887063] hub 4-1:1.0: unable to enumerate USB device on port 3
> 
> 
> So half of them is gone, just those remained. I downgraded to systemd
> 197 for the build just to make sure.

Those -19 and "unable to enumerate" messages aren't necessary; I'll
send you an updated version of the second patch that will get rid of
them.  However, the "USB disconnect" messages are unavoidable.

Once the error messages are gone, do you think that will be good 
enough?

Alan Stern

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