How to run wlan Atheros AR9485 on Linuxmint?

Question

ASUS

Good afternoon, I installed Linux Mint 17 Mate on my laptop and WiFi stopped working. Strangely, during installation it was available, but it was unstable and at a negligible speed. Now it does not start, does not search for networks and is generally unavailable. Asus has WiFi on / off by Fn + F2, but no reaction occurs.
Any suggestions on how to start? Atheros AR9485 card.
Some bash:

uname -r
3.13.0-24-generic
ifconfig 
eth0      Link encap:Ethernet  HWaddr xx:xx:xx:xx:xx:xx  
          inet addr:192.168.66.46  Bcast:192.168.66.255  Mask:255.255.255.0
          inet6 addr: fe80::beee:ff:ff:75a6/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:733916 errors:0 dropped:0 overruns:0 frame:0
          TX packets:320914 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:1073945559 (1.0 GB)  TX bytes:27964636 (27.9 MB)

lo        Link encap:Локальная петля (Loopback)  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:23293 errors:0 dropped:0 overruns:0 frame:0
          TX packets:23293 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:3662119 (3.6 MB)  TX bytes:3662119 (3.6 MB)

wlan0     Link encap:Ethernet  HWaddr xx:xx:xx:xx:xx:xx  
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

wlan0:avahi Link encap:Ethernet  HWaddr xx:xx:xx:xx:xx:xx  
          inet addr:169.254.11.13  Bcast:169.254.255.255  Mask:255.255.0.0
          UP BROADCAST MULTICAST  MTU:1500  Metric:1

iwconfig 
wlan0     IEEE 802.11bgn  ESSID:off/any  
          Mode:Managed  Access Point: Not-Associated   Tx-Power=16 dBm   
          Retry  long limit:7   RTS thr:off   Fragment thr:off
          Power Management:off
          
lo        no wireless extensions.

eth0      no wireless extensions.

rfkill list
0: phy0: Wireless LAN
  Soft blocked: no
  Hard blocked: no
1: asus-wlan: Wireless LAN
  Soft blocked: no
  Hard blocked: no
inxi -Nn
Network:   Card-1: Realtek RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller driver: r8169 
           IF: eth0 state: up speed: 100 Mbps duplex: full mac: xx:xx:xx:xx:xx:xx
           Card-2: Qualcomm Atheros AR9485 Wireless Network Adapter driver: ath9k 
           IF: wlan0 state: down mac: xx:xx:xx:xx:xx:xx

Answer 1

In general, the casket just opened. In order for WiFi to start, it had to be restarted from the console, more details here .
To make Fn + F2 work, just add to grub: acpi_osi='!Windows 2012'and since. Windows 8 ready laptop - that helps him. Read more here .
There was a problem with the brightness, but it will be solved soon.
Thank you for your attention;)