Ubuntu 14.04 GEFORCE GTX 970

I am using NVIDIA GTX 970 graphics card on Убунту Десктоп 14.04LTS (64 - бит). I installed the recommended драйвер 352.53 from the NVIDIA интернет-сайт. However, the screen randomly freezes disabling использовал of keyboard and мышь. I face the same problem on suspend mode. Only way to get it working again is through reboot. The NVIDIA интернет-сайт mentions about possible problems with драйверы in certain GTX 9xx configurations (which might be the я вступил в брак). I have tried several clean re-installations using older драйверы through the PPA, then separately from NVIDIA интернет-сайт and also the ones bundled with CUDA. So far, the problem remains unresolved. Any help in this regard would be greatly appreciated.