I have an issue with GPU not exiting PCIe D0 at all after being connected to an external monitor on the laptop, while I expect it to go to D3cold as usual.
Setup:
ThinkPad P1 Gen6 with 4090 laptop GPU, Intel CPU with iGPU, Fedora 41, Linux 6.11.5-300.fc41, nvidia driver 565.57.01.
External monitors are connected via Nvidia card (both HDMI and DP 1.4 via USB Type-C). Rendered on the iGPU.
Issue:
Boot the system. Observe the GPU settle into D3cold power state as it is not used (nvidia performance state is P8).
Connect the external monitor (Type-C). Observer PCIe power state D0, nvidia performance state P8.
Disconnect the external monitor.
Observe GPU not exiting PCIe D0 power state. Nvidia Performance state is at P8 at the same time.
In this case I observer higher power consumption by about 10W then when GPU is in D3cold. At the same time CPU package power will not go below 5.8W while core and graphics power is 0.5W combined.
This is a fresh setup so I don’t have any historical data, but this was the case with the previous release I believe.