I've been working on specifying the cause of the freeze, but it seems like the freeze occurs at a random occasion (no specific cause that I can think of).
By freeze, I mean the following:
1. Every object on the screen becomes unresponsive when clicked / hovered on
2. the cursor still moves
3. Every keyboard shortcut (like Ctrl+Alt+Esc, Alt+F4,etc.) does not work except for the commands to launch tty (Ctrl + Alt + F1, etc.)
4. when tty is launched, I can type in shell commands,etc but even the simplest commands (like ls, cat ... , cd , etc.) take a long time (like 20sec ~ 1 min depending on the command) to return the results
From these features, I am speculating that freeze is caused by one of the applications in charge of the GUI (cinnamon, X server, etc.) being "stuck" for some reason and taking up all of the CPU time, but I am not sure.
I would like to see system logs, etc to figure out exactly what is causing the issue, but it is very difficult because I am not sure what is triggering the freeze.
Any advice (such as which system logs to look at) is appreciated.
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System: Host: ysul0614-LM19 Kernel: 4.15.0-43-generic x86_64 bits: 64 gcc: 7.3.0
Desktop: Cinnamon 3.8.9 (Gtk 3.22.30-1ubuntu1) Distro: Linux Mint 19 Tara
Machine: Device: laptop System: ASUSTeK product: UX303UA v: 1.0 serial: N/A
Mobo: ASUSTeK model: UX303UA v: 1.0 serial: N/A
UEFI: American Megatrends v: UX303UA.301 date: 05/16/2017
Battery BAT0: charge: 42.2 Wh 97.8% condition: 43.2/50.1 Wh (86%) model: ASUSTeK ASUS status: Discharging
hidpp__0: charge: N/A condition: NA/NA Wh
model: Logitech MX Ergo Multi-Device Trackball status: Discharging
CPU: Dual core Intel Core i7-6500U (-MT-MCP-) arch: Skylake rev.3 cache: 4096 KB
flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx) bmips: 10368
clock speeds: max: 3100 MHz 1: 500 MHz 2: 500 MHz 3: 500 MHz 4: 500 MHz
Graphics: Card: Intel HD Graphics 520 bus-ID: 00:02.0
Display Server: x11 (X.Org 1.19.6 ) drivers: modesetting (unloaded: fbdev,vesa)
Resolution: 1920x1080@60.00hz, 1920x1080@60.00hz
OpenGL: renderer: Mesa DRI Intel HD Graphics 520 (Skylake GT2)
version: 4.5 Mesa 18.0.5 Direct Render: Yes
Audio: Card-1 Intel Sunrise Point-LP HD Audio driver: snd_hda_intel bus-ID: 00:1f.3
Card-2 GYROCOM C&C driver: USB Audio usb-ID: 001-006
Sound: Advanced Linux Sound Architecture v: k4.15.0-43-generic
Network: Card-1: Intel Wireless 7265 driver: iwlwifi bus-ID: 01:00.0
IF: wlp1s0 state: up mac: <filter>
Card-2: Atmel usb-ID: 001-007
IF: null-if-id state: N/A speed: N/A duplex: N/A mac: N/A
Drives: HDD Total Size: 4512.9GB (6.1% used)
ID-1: /dev/sda model: HFS512G32MND size: 512.1GB temp: 31C
ID-2: USB /dev/sdb model: BUP_BK size: 4000.8GB temp: 0C
Partition: ID-1: / size: 47G used: 25G (55%) fs: btrfs dev: /dev/sda6
ID-2: /home size: 74G used: 48G (67%) fs: btrfs dev: /dev/sda8
ID-3: swap-1 size: 16.00GB used: 0.00GB (0%) fs: swap dev: /dev/sda9
RAID: No RAID devices: /proc/mdstat, md_mod kernel module present
Sensors: System Temperatures: cpu: 48.0C mobo: N/A
Fan Speeds (in rpm): cpu: 2200
Info: Processes: 319 Uptime: 22 min Memory: 2764.5/11912.5MB Init: systemd runlevel: 5 Gcc sys: 7.3.0
Client: Shell (bash 4.4.191) inxi: 2.3.56