Constant crash in Unity - 'too many threads'

Questions & Answers
1

Starting a fresh install of Unity, running an empty default level, gives me the error:
“Fatal error in gc”, “too many threads”. After clicking ok, Unity crashes.

I’ve been using Unity for a year and this never happened previously. Now Unity is suddenly unusable. I reinstalled Unity to no effect.

Anyone have ideas? Looking at the callstack in the debugger for the crash, I get:

KernelBase.dll!759c3219()
[Frames below may be incorrect and/or missing, no symbols loaded for KernelBase.dll]
mono.dll!09d56e63()
ntdll.dll!773299a0()
ntdll.dll!7732a1e6()
ntdll.dll!77329ecc()

Could really use help on this one, our project is completely blocked until we figure out what’s going on.

2

I had this problem before, but I managed to solve it. I changed in bios from optimus to discrete grahpics. The problem never apeared again since.

3

Lenovo T530, crashes like this when using nVidia chip. Use integrated graphics, no crash. Using external DVI (Oculus) via Display Port/DVI converter.