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    SubjectRe: attempt to scan fails (device busy) if essid/ssid was changed recently
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    On Tue, 2009-04-07 at 03:00 +0300, Maxim Levitsky wrote:

    > I noticed that always first attempt at scan fails when NM asks for scan.
    > I also noticed that this happens with quite recent kernels (I think
    > 2,6.28) didn't have this behavior.

    I'm pretty sure it did.

    > Looking a bit deeper I discovered that each time NM disconnects from a
    > networks it sets random ssid/essid to the card (using wireless
    > extensions)

    This forces a scan

    > After that scan fails for some time.
    >
    > as a NM free example you can run
    >
    > iwconfig wlan0 essid dummy
    > iwlist scan

    and then this fails with EBUSY.

    johannes
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