<auto_select_gpus=True, gpus=-1> raise MisconfigurationException("GPUs requested but none are available.")

[ssaru]

🐛 Bug

auto_select_gpus

if auto_select_gpus enabled and gpus is an integer, pick available gpus automatically.

but, if you set gpus is -1, raise MisconfigurationException("GPUs requested but none are available.")

Please reproduce using [the BoringModel and post here]

bug_auto_select_gpus

Expected behavior

pick all gpus

Environment

• CUDA:
  • GPU:
    • Quadro RTX 6000
  • available: True
  • version: 10.1
• Packages:
  • numpy: 1.19.2
  • pyTorch_debug: False
  • pyTorch_version: 1.6.0+cu101
  • pytorch-lightning: 0.9.0
  • tqdm: 4.50.2
• System:
  • OS: Linux
  • architecture:
    • 64bit
  • processor: x86_64
  • python: 3.6.9
  • version: refactored trainer init #206-Ubuntu SMP Fri Feb 28 05:02:04 UTC 2020

Additional context

(cc. @inmoonlight)