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使用 Ubuntu 18.04.2 时，即使执行小任务（甚至鼠标不动）也会频繁出现屏幕冻结

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使用 Ubuntu 18.04.2 时，即使执行小任务（甚至鼠标不动）也会频繁出现屏幕冻结

我Ubuntu 18.04.2 LTS在 Windows 10 双启动上安装了操作系统，一个月内运行良好，没有任何问题。我是 UBuntu 操作系统的初学者，我按照在线教程自行设置操作系统。

最近，我多次遇到屏幕冻结的情况，每次我都需要强制停止并等待一段时间然后重新启动。我尝试了几个在线教程来解决我的问题。我的硬件配置是 nvidia Graphics 和 i7-8th gen 以及 16GB RAM。

我尝试了以下命令，VGA 兼容性显示 Intel，而不是 nvidia。不确定哪一个是正确的。

输出如下：

lspci | grep VGA
00:02.0 VGA compatible controller: Intel Corporation Device 3e9b


lspci -v
00:00.0 Host bridge: Intel Corporation 8th Gen Core Processor Host Bridge/DRAM Registers (rev 07)
    Subsystem: Dell Device 086f
    Flags: bus master, fast devsel, latency 0
    Capabilities: <access denied>

00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor PCIe Controller (x16) (rev 07) (prog-if 00 [Normal decode])
    Flags: bus master, fast devsel, latency 0, IRQ 122
    Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
    I/O behind bridge: 00004000-00004fff
    Memory behind bridge: a3000000-a40fffff
    Prefetchable memory behind bridge: 0000000090000000-00000000a1ffffff
    Capabilities: <access denied>
    Kernel driver in use: pcieport

00:02.0 VGA compatible controller: Intel Corporation Device 3e9b (prog-if 00 [VGA controller])
    Subsystem: Dell Device 086f
    Flags: bus master, fast devsel, latency 0, IRQ 142
    Memory at a2000000 (64-bit, non-prefetchable) [size=16M]
    Memory at 80000000 (64-bit, prefetchable) [size=256M]
    I/O ports at 5000 [size=64]
    [virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
    Capabilities: <access denied>
    Kernel driver in use: i915
    Kernel modules: i915

01:00.0 3D controller: NVIDIA Corporation GP107M [GeForce GTX 1050 Ti Mobile] (rev a1)
    Subsystem: Dell GP107M [GeForce GTX 1050 Ti Mobile]
    Flags: bus master, fast devsel, latency 0, IRQ 144
    Memory at a3000000 (32-bit, non-prefetchable) [size=16M]
    Memory at 90000000 (64-bit, prefetchable) [size=256M]
    Memory at a0000000 (64-bit, prefetchable) [size=32M]
    I/O ports at 4000 [size=128]
    [virtual] Expansion ROM at a4000000 [disabled] [size=512K]
    Capabilities: <access denied>
    Kernel driver in use: nvidia
    Kernel modules: nvidiafb, nouveau, nvidia_drm, nvidia

我目前正在使用 nvidia-390 驱动程序和 lightDM 包。请建议这是否是图形问题，或者我是否应该安装任何软件/驱动程序来解决这些问题？

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