title: created the nexus 5 emulator in android studio its show only black screen?
body: <p>I created the nexus 5 and nexus 7 emulator in android studio. I launch the both emulator one by one. Nexus 7 emulator is working fine but in nexus 5 contains only the black screen i waited more than 1 hour. what was the problem.</p>
  
  <p>It shows the message in:</p>
  
  <pre><code>        emulator: device fd:628
          HAX is not working and emulator runs in emulation mode
          emulator: The memory needed by this AVD exceeds the max specified in your HAXM configuration.
          emulator: AVD      RAM size = 1536 MB
          emulator: HAXM max RAM size = 512 MB
          emulator: You might want to adjust your AVD RAM size and/or HAXM configuration to run in fast virt mode.
  </code></pre>
  
  <p>The details of nexus 5 emulator</p>
  
  <p>Name: Nexus_5_API_21 CPU/ABI: Intel Atom (x86) Path: C:\xxx.android\avd\Nexus_5_API_21.avd 
  Target: Android 5.0.1 (API level 21)
  Skin: nexus_5 
  SD Card: \Nexus_5_API_21.avd\sdcard.img 
  Snapshot: yes hw.dPad: no runtime.network.speed: full hw.accelerometer: yes hw.device.name: Nexus 5 vm.heapSize: 64 skin.dynamic: yes hw.device.manufacturer: Google hw.gps: yes hw.audioInput: yes tag.id: default hw.camera.back: none hw.mainKeys: no AvdId: Nexus_5_API_21 hw.camera.front: none hw.lcd.density: 480 runtime.scalefactor: auto avd.ini.displayname: Nexus 5 API 21 snapshot.present: yes hw.device.hash2: MD5:2fa0e16c8cceb7d385183284107c0c88 hw.ramSize: 1536 hw.trackBall: no hw.battery: yes hw.sdCard: yes tag.display: Default runtime.network.latency: none hw.keyboard: yes hw.sensors.proximity: yes disk.dataPartition.size: 200M hw.sensors.orientation: yes avd.ini.encoding: UTF-8 hw.gpu.enabled: no</p>