Default [Q] Issues getting screenshots in emulator. parts of screen missing

Hello I am wondering if anyone has ever experienced this problem.

I am trying to take screenshots of my app (or any app that I have tried) in the emulator. When I take a screenshot quite frequently part of the screen is corrupt / missing, like this = i.imgur.com/cjpNeaz.png , it can happen anywhere on the screen not just on the keyboard. If when using monitor to take the screenshot I can refresh and it make work and take a proper picture or another area of the screen may then get the problem blank area

I am using android-sdk_r22.6.2-linux on Ubuntu Trusty 14.04.

My emulated device is Nexus 4, 4.4.2, ARM cpu and any skin, no emulation options.

I have tried taking screenshots via monitor and adb but result in the same issue as seen in screenshot above.

Does anyone know how to fix this or am I going to have to take an ubuntu screenshot and crop to the android screen?