Nvidia-settings (GUI) doesn't save parameters to config file on exit

Hi there, seemingly the Nvidia settings (GUI) utility has issue with write/read config file.

Env:

• OS Debian Linux 11

Issue:

1. GUI Nvidia-settings utility [NVS] does not automatically save current config (clock offset settings) to ~/.nvidia-settings-rc file on close.
   Nevertheless,

• file modification time changes on exit.
• Settings other than clock offsets are saved

2. NVS doesn't read overclock settings on open.
   Nevertheless,

• Parameters transferred to Nvidia X server via command line (like nvidia-settings -a [gpu:0]/GPUMemoryTransferRateOffsetAllPerformanceLevels=1200) are queried and displayed by Nvidia settings (GUI) on open.

3. NVS doesn't save current clock offset to config file on manual save configuration

Initially I thought I had an issue with X Server, but seemingly there is a bug in Nvidia-settings GUI interface.

The initial discussion is over here:https://forums.developer.nvidia.com/t/nvidia-settings-x-server-communication-issue/196396/3

P.S. It also would be great to provide nvidia-settings users with documentation regarding commonly used commands like /GPUMemoryTransferRateOffsetAllPerformanceLevels=xx and similar. (They are not presented in one place as far as I see, and they are not so obvious to be discovered)

Reproduce the issue in the Nvidia-settings GUI on Debian Linux 11, checking ~/.nvidia-settings-rc after exit and after manual save. Compare the GUI behavior with the command-line setting GPUMemoryTransferRateOffsetAllPerformanceLevels=1200; done means clock offset settings are saved and restored when the GUI closes and reopens. No source file or test is identified in the report.