With 460.56 I get below errors on Ubuntu 20.10 on Dell Inspiron 7577 laptop 
with nVIDIA GeForce GTX 1060 with max-Q design (and Intel GPU as well but Prime 
setting is NVIDIA performance mode):
grep DMA /var/log/syslog
Feb 27 19:54:26 Dell7577Linux kernel: [43459.186526] nvidia-modeset: ERROR: 
GPU:0: Notifier DMA allocation failed
Feb 27 19:54:26 Dell7577Linux kernel: [43459.186528] nvidia-modeset: ERROR: 
GPU:0: Failed to allocate display engine core DMA push buffer
I get no desktop anymore after resume on suspend to RAM, only above errors in 
text display.

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https://bugs.launchpad.net/bugs/1911055

Title:
  [modeset][nvidia] suspend/resume broken in nvidia-460 : Display engine
  push buffer channel allocation failed

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