**Hello everybody, as some of those people who play the Source engine based games on laptops with dedicated video cards are probably aware of really annoying problem, some of the Source engine games runs only with medium level of shadows which has no dynamic shadows, moreover the high level of shadows option is not even available, you can choose only between low and medium ones. If you type mat_info in console you will see that the game runs on Intel HD video cards which have no dynamic shadows.
As I know it happens if you use video card drivers released for Windows 7, 8, 8.1. The only solution I found was using command in launch options forcing the game to use specific dedicated video card ID.
here is that command: -force_vendor_id 0x10DE -force_device_id 0x1180
If you still have Windows 7, 8 and 8.1 this command can help you to enable dynamic shadows for some Source games, **but still not for Garry’s mod.
**Recently, I upgraded my Windows 8.1 to Windows 10 and videocard driver as well, now I don’t need to use that command anymore, because Garry’s Mod shows Dedicated video card (mine is Ati HD 7600M) in console, it runs on dedicated video card perfectly, new video card driver and Windows 10 detected dedicated video card, in the settings it shows High level of shadows. In my Catalyst Control center hl2.exe (from directory of garry’s mod) is set for “High Performance” which means Dedicated video card, but as I said earlier Windows 10 and new Catalyst driver have no problem with detection dedicated video card for Source games anymore, it’s gone.
**The problem is Garry’s mod stops working right in that moment when I change level of shadows from medium to the highest one while I play, it just gets paused for good. ** Also, no need to use graphic control panel, because video card driver and Windows 10 have no problem with detection of dedicated card for Source games, I guess it’s still the problem of the Source engine Garry’s mod runs on. Even if Garry’s mod runs on dedicated video card it still cannot work with High level of shadows.