我有一台华硕笔记本电脑，TUF566IV，运行 Kubuntu 23.04。它配备了 RTX 2060 和集成的 AMD gpu。
我最初有一个 HDMI 外接显示器，显示由 iGPU 处理，仅使用 RTX 进行机器学习。
我添加了另一台显示器，插入 USB-C 端口（兼容显示端口），所以现在我使用所有 3 个显示器：2 个外接显示器和笔记本电脑屏幕。
显然，除非 RTX 处理显示，否则我无法让 USB-C 显示器工作，这会导致 GPU 不断使用（根据 nvidia-smi 为 1% 到 25%），风扇不断或多或少发出很大的声音，更烦人的是，kde/plasmashell 频繁崩溃，从而杀死浏览器、pycharm 等多个应用程序。
Xorg 进程也持续占用大约 7% 的 CPU。
作为参考，这是我当前的 xorg.conf（我测试了相当多的变化并且这个有效，即所有 3 个监视器都处于活动状态）：
Identifier "Device0"
Driver "amdgpu"
VendorName "amd"
BusID "PCI:5:0:0"
Option "UseNvKmsCompositionPipeline" "false"
EndSection
Section "ServerLayout"
Identifier "Layout0"
Screen 0 "Screen0" 0 0
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Mouse0" "CorePointer"
Option "Xinerama" "0"
EndSection
Section "Files"
EndSection
Section "InputDevice"
# generated from default
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/psaux"
Option "Emulate3Buttons" "no"
Option "ZAxisMapping" "4 5"
EndSection
Section "InputDevice"
# generated from default
Identifier "Keyboard0"
Driver "kbd"
EndSection
Section "Monitor"
Identifier "Monitor0"
VendorName "Unknown"
ModelName "Unknown"
Option "DPMS"
EndSection
Section "Monitor"
Identifier "Monitor1"
VendorName "Unknown"
ModelName "Unknown"
Option "DPMS"
EndSection
Section "Monitor"
Identifier "Monitor2"
VendorName "Unknown"
ModelName "Unknown"
Option "DPMS"
EndSection
Section "Device"
Identifier "Device1"
Driver "nvidia"
VendorName "NVIDIA Corporation"
BusID "PCI:1:0:0"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Device1"
Monitor "Monitor0"
Option "UseNvKmsCompositionPipeline" "false"
Option "ForceCompositionPipeline" "1"
EndSection
Section "Screen"
Identifier "Screen1"
Device "Device1"
Monitor "Monitor1"
Option "UseNvKmsCompositionPipeline" "false"
Option "ForceCompositionPipeline" "1"
EndSection
Section "Screen"
Identifier "Screen2"
Device "Device1"
Monitor "Monitor2"
Option "UseNvKmsCompositionPipeline" "false"
Option "ForceCompositionPipeline" "1"
EndSection```
And the nvidia-smi output:
```+---------------------------------------------------------------------------------------+
| NVIDIA-SMI 530.30.02 Driver Version: 530.30.02 CUDA Version: 12.1 |
|-----------------------------------------+----------------------+----------------------+
| 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 NVIDIA GeForce RTX 2060 Off| 00000000:01:00.0 Off | N/A |
| N/A 42C P5 9W / 90W| 609MiB / 6144MiB | 3% Default |
| | | N/A |
+-----------------------------------------+----------------------+----------------------+
+---------------------------------------------------------------------------------------+
| Processes: |
| GPU GI CI PID Type Process name GPU Memory |
| ID ID Usage |
|=======================================================================================|
| 0 N/A N/A 1347 G /usr/lib/xorg/Xorg 307MiB |
| 0 N/A N/A 2346 G /usr/bin/ksmserver 2MiB |
| 0 N/A N/A 2348 G /usr/bin/kded5 2MiB |
| 0 N/A N/A 2351 G /usr/bin/kwin_x11 75MiB |
| 0 N/A N/A 2391 G /usr/bin/plasmashell 28MiB |
| 0 N/A N/A 2412 G ...c/polkit-kde-authentication-agent-1 2MiB |
| 0 N/A N/A 2461 G /usr/bin/birdtray 2MiB |
| 0 N/A N/A 2471 G ...86_64-linux-gnu/libexec/kdeconnectd 2MiB |
| 0 N/A N/A 2485 G /usr/bin/kaccess 2MiB |
| 0 N/A N/A 2490 G ...-linux-gnu/libexec/DiscoverNotifier 12MiB |
| 0 N/A N/A 2667 G /usr/lib/thunderbird/thunderbird 90MiB |
| 0 N/A N/A 2700 G ...-gnu/libexec/xdg-desktop-portal-kde 2MiB |
| 0 N/A N/A 3396 G ...61807972,1722809804713501230,262144 66MiB |
| 0 N/A N/A 3587 G ...bin/plasma-browser-integration-host 2MiB |
| 0 N/A N/A 3784 G /usr/bin/konsole 2MiB |
+---------------------------------------------------------------------------------------+
我认为我不能只使用集成 GPU 来拥有这 3 个显示器，因为 USB-C 输出没有物理连接到它。但是，如果有人能给我一些指点，我想找到一种方法来提高性能并避免这些频繁的崩溃。