Today I upgraded from Ubuntu 16 to 17. Everything worked fine until I left my computer on for about 2-3 hours. Then it crashed, except there were no error screen or message. Just the last image that happened before it crashed. The mouse won't move, keyboard doesn't work, and all the operations(My download stopped… I don't exactly know if everything does) don't continue. I just thought it was a random issue and carried on by powering off my machine manually, but it occurred again and I don't think this is just something to ignore. Any help would be nice for how to fix this as I have no idea. Also I am using Ubuntu desktop.

Update:
The output of ls -alt /var/crash is

total 8
drwxr-xr-x 14 root root 4096 Apr 11 21:21 ..
drwxrwsrwt 2 root whoopsie 4096 Apr 11 21:14 .

dpkg -l intel-microcode

Gives me the error

dpkg-query: no packages found matching intel-microcode

Free -h   

          total        used        free      shared  buff/cache   available

Mem: 7.7G 1.8G 349M 101M 5.6G 5.5G
Swap: 0B 0B 0B

and swapon gives no output.

Next update:

cat /etc/fstab #If there was a hashtag at the start of a line it got bolded.

# /etc/fstab: static file system information.  
#  
# Use 'blkid' to print the universally unique identifier for a  
# device; this may be used with UUID= as a more robust way to name devices  
# that works even if disks are added and removed. See fstab(5).  
#  
# <file system> <mount point>   <type>  <options>       <dump>  <pass>  
# / was on /dev/sda1 during installation  
UUID=8eedf4cb-b322-4455-905b-  c50264691a4d /               ext4    errors=remount-ro 0  1  
/swapfile                                 none            swap    sw              0       0   
/dev/mapper/cryptswap1 none swap sw 0 0

and here is my Gparted screenshot.

Next Update:
Output of sudo blkid (PARTUUID is on the same line its just it didn't come out that way on this)

/dev/sda1: UUID="8eedf4cb-b322-4455-905b-c50264691a4d" TYPE="ext4" PARTUUID="46d95458-01"  
/dev/sda5: UUID="4e48c05f-02d1-47ef-9a5f-bb8cba50dd2b" TYPE="ext4" PARTUUID="46d95458-05"  
/dev/sda6: UUID="7f7d6675-31a4-4100-9d32-5faa0e0cea3e" TYPE="swap" PARTUUID="46d95458-06"  
/dev/sdb1: LABEL="HD-LXU3" UUID="F45A29EB5A29AB76" TYPE="ntfs" PARTUUID="aa1e0d10-01"  

Output of ls -al /
total 2097264
drwxr-xr-x 24 root root 4096 May 26 12:10 .
drwxr-xr-x 24 root root 4096 May 26 12:10 ..
drwxr-xr-x 2 root root 4096 May 27 23:15 bin
drwxr-xr-x 3 root root 4096 May 29 13:09 boot
drwxrwxr-x 2 root root 4096 May 26 11:44 cdrom
drwxr-xr-x 22 root root 4480 Jun 4 12:00 dev
drwxr-xr-x 140 root root 12288 Jun 2 17:36 etc
drwxr-xr-x 4 root root 4096 May 26 11:47 home
lrwxrwxrwx 1 root root 33 May 26 12:10 initrd.img -> boot/initrd.img-4.10.0-21-generic
lrwxrwxrwx 1 root root 33 May 26 11:50 initrd.img.old -> boot/initrd.img-4.10.0-19-generic
drwxr-xr-x 25 root root 4096 May 26 13:03 lib
drwxr-xr-x 2 root root 4096 Apr 11 21:07 lib64
drwx—— 2 root root 16384 May 26 11:43 lost+found
drwxr-xr-x 3 root root 4096 May 26 11:56 media
drwxr-xr-x 2 root root 4096 Apr 11 21:07 mnt
drwxr-xr-x 5 root root 4096 May 28 09:51 opt
dr-xr-xr-x 242 root root 0 Jun 4 11:58 proc
drwx—— 4 root root 4096 May 29 21:03 root
drwxr-xr-x 30 root root 960 Jun 4 12:05 run
drwxr-xr-x 2 root root 12288 May 27 23:15 sbin
drwxr-xr-x 2 root root 4096 Apr 6 02:32 snap
drwxr-xr-x 2 root root 4096 Apr 11 21:07 srv
-rw——- 1 root root 2147483648 May 26 11:44 swapfile
dr-xr-xr-x 13 root root 0 Jun 4 13:43 sys
drwxrwxrwt 16 root root 4096 Jun 4 13:46 tmp
drwxr-xr-x 11 root root 4096 Apr 11 21:13 usr
drwxr-xr-x 15 root root 4096 May 28 14:08 var
lrwxrwxrwx 1 root root 30 May 26 12:10 vmlinuz -> boot/vmlinuz-4.10.0-21-generic
lrwxrwxrwx 1 root root 30 May 26 11:50 vmlinuz.old -> boot/vmlinuz-4.10.0-19-generic

Final Edits

free -h gives me:

>               total        used        free      shared  buff/cache   available
Mem:           7.7G        889M        6.2G         46M        692M        6.6G
Swap:          2.0G          0B        2.0G  

swapon gives:

NAME      TYPE      SIZE USED PRIO

> /dev/dm-0 partition   2G   0B   -1

And ls -alh /swapfile gives:

-rw——- 1 root root 2.0G Jun 4 21:41 /swapfile

Also my startup time has increased tremulously.