笔者毕业设计使用的ubuntu18.04太卡，但是在更行之前的ubuntu16.04不卡且windows运行良好。想尝试一些方法改善状况，写此博客记录。

一、显卡驱动

1.1如何查看以安装的驱动

sudo lshw -c video

出现

  *-display                 
       description: VGA compatible controller
       product: GP107M [GeForce GTX 1050 Ti Mobile]
       vendor: NVIDIA Corporation
       physical id: 0
       bus info: pci@0000:01:00.0
       version: a1
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress vga_controller bus_master cap_list rom
       configuration: driver=nvidia latency=0
       resources: irq:141 memory:a3000000-a3ffffff memory:90000000-9fffffff memory:a0000000-a1ffffff ioport:4000(size=128) memory:a4080000-a40fffff
  *-display
       description: VGA compatible controller
       product: Intel Corporation
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       version: 00
       width: 64 bits
       clock: 33MHz
       capabilities: pciexpress msi pm vga_controller bus_master cap_list rom
       configuration: driver=i915 latency=0
       resources: irq:139 memory:a2000000-a2ffffff memory:b0000000-bfffffff ioport:5000(size=64) memory:c0000-dffff

可以看出安装的是 GeForce GTX 1050 Ti Mobile 。

1.2如何查看需要安装的驱动

ubuntu-drivers devices

出现

== /sys/devices/pci0000:00/0000:00:01.0/0000:01:00.0 ==
modalias : pci:v000010DEd00001C8Csv000017AAsd000039FDbc03sc00i00
vendor   : NVIDIA Corporation
model    : GP107M [GeForce GTX 1050 Ti Mobile]
driver   : nvidia-driver-460 - distro non-free
driver   : nvidia-driver-450-server - distro non-free
driver   : nvidia-driver-495 - distro non-free recommended
driver   : nvidia-driver-460-server - distro non-free
driver   : nvidia-driver-418-server - distro non-free
driver   : nvidia-driver-470 - distro non-free
driver   : nvidia-driver-390 - distro non-free
driver   : nvidia-driver-470-server - distro non-free
driver   : xserver-xorg-video-nouveau - distro free builtin

== /sys/devices/pci0000:00/0000:00:1d.4/0000:07:00.0 ==
modalias : pci:v00008086d00003166sv00008086sd00004210bc02sc80i00
vendor   : Intel Corporation
model    : Dual Band Wireless-AC 3165 Plus Bluetooth
manual_install: True
driver   : backport-iwlwifi-dkms - distro free

可以看出推荐的是nvidia-driver-495。

1.3如何安装需要的驱动

sudo ubuntu-drivers autoinstall

1.3.1卸载Nouveau

二、buntu swap分区

2.1 如何查看 swap 分区大小

装ubuntu的时候印象中是挺大的，映象中是8G,查询其他博客后看到俩中方法

cat /proc/swaps

Filename				Type		Size	Used	Priority
/dev/sda7        partition	1000444	0	-2

free -m

              总计         已用        空闲      共享    缓冲/缓存    可用
内存：        7849        2507        3567         372        1774        4695
交换：         976           0         976

一个查询到是1000444，一个是976，应该是单位问题，976*1024后比较接近。