我目前正在使用 Ubuntu 18.04.5LTS，我发现每次重启电脑时，亮度都会自动恢复到 66%。但是，每次重启时似乎都会记住音量设置。有什么方法可以确保系统在关机前记住亮度设置？
GPU 信息：
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 450.80.02 Driver Version: 450.80.02 CUDA Version: 11.0 |
|-------------------------------+----------------------+----------------------+
| GPU Name Persistence-M| Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. |
| | | MIG M. |
|===============================+======================+======================|
| 0 GeForce RTX 2060 Off | 00000000:01:00.0 On | N/A |
| N/A 50C P8 6W / N/A | 438MiB / 5931MiB | 3% Default |
| | | N/A |
+-------------------------------+----------------------+----------------------+
+-----------------------------------------------------------------------------+
| Processes: |
| GPU GI CI PID Type Process name GPU Memory |
| ID ID Usage |
|=============================================================================|
| 0 N/A N/A 1292 G /usr/lib/xorg/Xorg 18MiB |
| 0 N/A N/A 1438 G /usr/bin/gnome-shell 51MiB |
| 0 N/A N/A 2829 G /usr/lib/xorg/Xorg 131MiB |
| 0 N/A N/A 2942 G /usr/bin/gnome-shell 141MiB |
| 0 N/A N/A 3385 G ...AAAAAAAA== --shared-files 92MiB |
+-----------------------------------------------------------------------------+