With CUDA 7 and nvidia-346, Ubuntu stuck at boot splash screen if temperature is 24C cold

Operating system: Ubuntu 14.04.2 x64

With nvidia-cuda-toolkit installed, after upgrading to cuda-7 and nvidia-346 using apt-get, now Ubuntu will stuck at splash screen if my computer is booting from cold. Once it gets warm (by firstly booting into another CUDA-less kernel and then reboot), it will not stuck. Probably a driver bug?

Btw, my room temperature is at about 24C, not ice-freezing cold.