Re: IBM T30 USB issue: kernel: uhub2: device problem, disabling

Dear Hackers,

[ for archive purposes ]

all the USB stack debug traces are available at

http://www.geocities.com/m_evmenkin/usb/

i also managed to get USB dumps from W2K that runs on the same laptop.

http://www.geocities.com/m_evmenkin/usb/USB_HUB.LOG
   trace when W2K attach the second hub inside the docking station

http://www.geocities.com/m_evmenkin/usb/BT3C_USB.LOG
   trace when W2K attaches the device i plug into hub

i tried the following with out any success

1) use polling for uhci(4) (just to make sure we are not missing
    interrupt or something like that). i did not make any difference
    even when i set polling interval to very small value.

2) increase the number of retries, i.e. i tried to call usbd_new_device
    in a loop from uhub_explore.

3) increase various time constants (power up time etc.)

4) i even went crazy and re-wrote the uhub_explore() function to do very
    similar (to Linux) things, i.e. all these port debounce stuff etc.
    it did not work :(

one thing i noticed is that device will either work right away or
will not work at all. it does not matter how many tries you have.

at this point i do not know what to do. i have sent e-mail to Lennart
but did not receive any reply yet.

if any USB expert care to comment i'm all ears :)

thanks,
max

> On Tue, Apr 01, 2003 at 10:02:47AM -0800, Lee Damon wrote:
>
>
>> When I try to activate a Bluetooth USB device, I get the following 
>> error:
>>  Apr  1 09:57:26 tylendel kernel: uhub2: device problem, disabling 
>> port 1
>>
>> I am reasonably convinced it isn't a problem with the bluetooth daughter
>> card (but can be convinced otherwise, of course).
>
>
>
> Additional hints on this can be found in the freebsd-mobile archive,
> look for posts were the topic contains 'Bluetooth on IBM T30' which are
> about a week old.
>
> This is a problem that exists for some time, and I am also willing to
> help fix it. It is not specific for IBM T30, but happens on a varety of
> laptops, and probably as well on desktops that have an usb hub connected.
>
> Also, I get the same error on my T30 when I resume it from suspend mode
> with 4.8 Prerelease, then the usb mouse dies. This did NOT happen with
> a 4.7 stable built some time around december 2002. But then I have no
> idea if this is related to the above problem.
>
> kind regards, t.


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