update readme

old-commit-hash: 5644b2875d

tools/webcam/README.md

@@ -17,10 +17,10 @@ git clone https://github.com/commaai/openpilot.git
 ```
 - Follow [this readme](https://github.com/commaai/openpilot/tree/master/tools) to install the requirements  
 - Add line "export PYTHONPATH=$HOME/openpilot" to your ~/.bashrc  
-- You also need to install tensorflow-gpu 2.1.0 and nvidia drivers: nvidia-xxx/cuda10.0/cudnn7.6.5  
+- You also need to install tensorflow-gpu 2.1.0 (if not working, try 2.0.0) and nvidia drivers: nvidia-xxx/cuda10.0/cudnn7.6.5  
 - Install [OpenCL Driver](http://registrationcenter-download.intel.com/akdlm/irc_nas/12556/opencl_runtime_16.1.2_x64_rh_6.4.0.37.tgz)  
 - (Note: the code assumes cl platforms order to be 0.GPU/1.CPU when running clinfo; if reverse, change the -1 to -2 in selfdrive/modeld/modeld.cc#L130; helping us refactor this mess is encouraged)  
-- Install [OpenCV4](https://www.pyimagesearch.com/2018/08/15/how-to-install-opencv-4-on-ubuntu/)  
+- Install [OpenCV4](https://www.pyimagesearch.com/2018/08/15/how-to-install-opencv-4-on-ubuntu/) (ignore the Python part)  
 
 ## Build openpilot for webcam  
 ```