Hi, I’m running nvidia 455.45.01 on my Arch Linux computer, and when upgrading to linux 5.10, I noticed PRIME Synchronization wasn’t working anymore (I’m experiencing screen tearing). Upon downgrading to linux 5.9.14, it works again. It reminds me of this issue . Could it perhaps be related? Cheer…

also with 5.10 and optimus laptop, nvidia card is always active, on 5.9.16 all is working correct

@phusho see this thread about non-functioning PCI-Express runtime power management.

PRIME Synchronization is broken on linux 5.10

pobrn January 2, 2021, 5:36pm 4

With the 460.27.04 driver PRIME synchronization seems to be working again (Linux 5.10.4).

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