Regression from 2.6.21 to 2.6.22 and above - Kernel

This is a discussion on Regression from 2.6.21 to 2.6.22 and above - Kernel ; Hello, my Kobil KAAN Professional (USB variant) smartcard reader stopped working when upgrading from 2.6.21 to 2.6.22 (and 2.6.23). Not working means that the latest libct.so supplied from Kobil is segfaulting when trying to access the device. But as far ...

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Thread: Regression from 2.6.21 to 2.6.22 and above

  1. Regression from 2.6.21 to 2.6.22 and above

    Hello,

    my Kobil KAAN Professional (USB variant) smartcard reader stopped
    working when upgrading from 2.6.21 to 2.6.22 (and 2.6.23). Not working
    means that the latest libct.so supplied from Kobil is segfaulting when
    trying to access the device. But as far as I can see the kobil_sct
    driver itself didn't change from 2.6.21 to 2.6.22. Any ideas what is
    going on here?

    Thanks in advance. I will provide additional information if needed.

    --
    Stefan Scheler

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  2. Re: Regression from 2.6.21 to 2.6.22 and above

    On 10/11/2007 06:41 AM, Stefan Scheler wrote:
    > Hello,
    >
    > my Kobil KAAN Professional (USB variant) smartcard reader stopped
    > working when upgrading from 2.6.21 to 2.6.22 (and 2.6.23). Not working
    > means that the latest libct.so supplied from Kobil is segfaulting when
    > trying to access the device. But as far as I can see the kobil_sct
    > driver itself didn't change from 2.6.21 to 2.6.22. Any ideas what is
    > going on here?
    >
    > Thanks in advance. I will provide additional information if needed.
    >


    Try turning off USB autosuspend by adding the kernel option
    "usbcore.autosuspend=-1". Or if your USB is modular, add "autosuspend=-1"
    to the module parameters.

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  3. Re: Regression from 2.6.21 to 2.6.22 and above

    > Try turning off USB autosuspend by adding the kernel option
    > "usbcore.autosuspend=-1". Or if your USB is modular, add "autosuspend=-1"
    > to the module parameters.


    Doesn't help. You also might have a look at the linux-usb-devel list. I
    posted a couple of logs there.

    --
    Stefan Scheler


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