[Bug 35249] Re: acx firmware are not available for the driver

[Ben Collins]

ACX firmware is done just like all other firmware. If your firmware is not being found, then you have a problem on your system (old udev, conflicting package like some odd hotplug scripts or some such).

If the firmware isn't being found and your system does not conflict with normal load operations, then I can only blame udev.
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acx firmware are not available for the driver
https://launchpad.net/malone/bugs/35249