I can't enter desktop after "apt install cmake", what can I do for it?

I used 2.0 alpha system
Once I typed
“sudo apt update”
“sudo apt install cmake”
“sudo reboot”
then, I can’t enter desktop, in login page , loop input “nvidia”, black screen ,input… no use.
What can I do for it ? I have some date in PX2 and both Tegra-A and Tegra-B are bad. T_T Help me please.

Dear Dain,

I think Alpha 2.0 is too old version so could you please update DPX2 SDK and Aurix F/W version?
We had released Beta 3.0 SDK on https://developer.nvidia.com/nvidia-drive-downloads. Thanks.