Случайное замораживание Ubuntu 18,04 Unity

Host: 123 Kernel: 4.18.0-20-generic x86_64 bits: 64
           Desktop: Gnome 3.28.3 Distro: Ubuntu 18.04.2 LTS
Machine:   Device: desktop System: ASUS product: All Series serial: N/A
           Mobo: ASUSTeK model: H81M-CS v: Rev X.0x serial: N/A
           BIOS: American Megatrends v: 0302 date: 07/28/2014
CPU:       Quad core Intel Core i5-4440 (-MCP-) cache: 6144 KB
           clock speeds: max: 3300 MHz 1: 911 MHz 2: 1415 MHz 3: 1090 MHz
           4: 1377 MHz
Graphics:  Card: Intel Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller
           Display Server: x11 (X.Org 1.20.1 )
           drivers: modesetting (unloaded: fbdev,vesa)
           Resolution: 1920x1080@60.00hz
           OpenGL: renderer: Mesa DRI Intel Haswell Desktop
           version: 4.5 Mesa 18.2.8
Audio:     Card Intel 8 Series/C220 Series High Def. Audio Controller
           driver: snd_hda_intel
           Sound: Advanced Linux Sound Architecture v: k4.18.0-20-generic
Network:   Card-1: Realtek RTL8111/8168/8411 PCIE Gigabit Ethernet Controller
           driver: r8169
           IF: enp3s0 state: down mac: 38:2c:4a:b6:27:de
           Card-2: Realtek RTL8188EUS 802.11n Wireless Network Adapter
           driver: r8188eu
           IF: wlx503eaa724ce0 state: N/A mac: N/A
Drives:    HDD Total Size: 500.1GB (2.5% used)
           ID-1: /dev/sda model: TOSHIBA_DT01ACA0 size: 500.1GB
Partition: ID-1: / size: 458G used: 12G (3%) fs: ext4 dev: /dev/sda1
RAID:      No RAID devices: /proc/mdstat, md_mod kernel module present
Sensors:   System Temperatures: cpu: 29.8C mobo: 27.8C
           Fan Speeds (in rpm): cpu: 0
Info:      Processes: 239 Uptime: 2 min Memory: 790.3/7849.3MB
           Client: Shell (bash) inxi: 2.3.56 

Это результат команды $ inxi -F. ps, я новичок в Ubuntu, пожалуйста, будьте как можно подробнее.