Comment 5 for bug 31188

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Scott James Remnant (Canonical) (canonical-scott) wrote : Re: udev renaming can cause odd network names

udev doesn't generate the _clashed name, iftab_helper does if the mac address of the card just added doesn't appear in /etc/iftab

Is it possible that your card doesn't have a mac address when it's inserted? I recall you're using wlan-ng? What drivers/cards are other people experiencing this bug using?