Under 14.04, I get this too on an Intel chipset.  You can disable and
re-enable networking and they'll come back.  A reboot is not
necessary.  (At least on the three Lenovo Thinkpads I have with the
problem.)

-Josh More

On Wed, Jan 7, 2015 at 9:52 PM, Brian Wall <kc0iog at gmail.com> wrote:
> On Wed, Jan 7, 2015 at 12:21 AM, Brian Wood <woodbrian77 at gmail.com> wrote:
>> Periodically when I start a laptop with Ubuntu 14.04 on it
>> there aren't any access points to select from when I click
>> on the wifi/networking icon.  The only way I've been able
>> to work around that is to reboot the system.
>
> What is the wireless driver and chipset?  I've seen an issue very
> similar to this on a certain Intel wireless chip.  I never resolved
> it, but I narrowed it down to a problem with the linux driver for that
> particular chipset.
>
> Brian
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