Im getting a blackscreen in gmod orginal not the beta as it works fine for some reason. When i start it up it takes a while to create renders then its gone. I can re-install gmod again and it will be fine for a few times i s tart it but then again black screen. I also see some lining of it heres a pic of it.
My system specs:
Intel Pentium Dual Core E5200 Processor
6GB of ram