[Bugs] #3876 sugar UNSP: Sugar needs method to force wifi network rescan

[Sugar Labs Bugs]

#3876: Sugar needs method to force wifi network rescan
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    Reporter:  greenfeld                  |          Owner:  erikos                     
        Type:  enhancement                |         Status:  new                        
    Priority:  Unspecified by Maintainer  |      Milestone:  Unspecified by Release Team
   Component:  sugar                      |        Version:  Unspecified                
    Severity:  Unspecified                |       Keywords:                             
Distribution:  OLPC                       |   Status_field:  Unconfirmed                
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 At the OLPC Miami office it is often hard for Sugar's network view to see
 the desired network to connect to the first time.  There are over 200+
 wifi networks in the area, and each scan only finds ~20-40.

 It would be nice if Sugar had a method to force all connected wireless
 devices that support rescanning for networks to rescan from the Network
 view.  I keep having to run "iwconfig eth0 rescan" as root to update the
 list quickly (eth0 because wlan0 is renamed to that in OLPC builds, root
 because non-root rescans just show the last cached result).

 Note this does have to be a forced rescan method that runs as root at the
 Linux level, even if NM takes care of that for us.

 Seen in OLPC 13.1.0 os1 & prior.

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Ticket URL: <http://bugs.sugarlabs.org/ticket/3876>
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