Ubuntu freezes at "show applications" page

As a Linux beginner, I installed ubuntu today (no dual boot) with suggested extras.

I come across with few freezes. They happened in the "show applications" place. You know like.. 9 small dots icon that shows all applications when clicked. When I click on groups (that holds similar applications together in one icon) and when I close that group. It re-renders itself again (that's normal).

But sometimes, right after closing the group. Screen freezes. Like. The application menu is open but there is no application loaded to the list yet. Sometimes I can move my mouse but can't click anything.

Picture of Frozen screen right after closing one of my applications folders. as you can see it froze while loading the applications again

Well, I did search a bit. Ppl suggested accessing a terminal and killing all processes. I tried Ctrl + Alt + F1 and it sent me to the account signing place (i guess it's for protection) when I type my password and hit enter. the screen goes black. I can press Ctrl+alt+f1 again to do the same thing but the result is also the same black screen instead of the console.

Any possible solution for this problem?

these are few command ppl asked for:

>>sudo ls -al ~/.local/share/gnome-shell/extensions

ls: cannot access '/home/sayochi/.local/share/gnome-shell/extensions': No such file or directory

>>sudo ls -al /usr/share/gnome-shell/extensions

total 20
drwxr-xr-x 5 root root 4096 Şub  9 21:49 .
drwxr-xr-x 7 root root 4096 Haz 13 18:57 ..
drwxr-xr-x 2 root root 4096 Şub  9 21:49 desktop-icons@csoriano
drwxr-xr-x 3 root root 4096 Haz 13 19:09 [email protected]
drwxr-xr-x 3 root root 4096 Şub  9 21:49 [email protected]

Solution 1:

Your 2G /swapfile is too small, so we'll increase it to 4G...

Note: Incorrect use of the rm and dd commands can cause data loss. Suggest copy/paste.

In the terminal...

sudo swapoff -a           # turn off swap
sudo rm -i /swapfile      # remove old /swapfile

sudo dd if=/dev/zero of=/swapfile bs=1M count=4096

sudo chmod 600 /swapfile  # set proper file protections
sudo mkswap /swapfile     # init /swapfile
sudo swapon /swapfile     # turn on swap
free -h                   # confirm 8G RAM and 4G swap

Edit /etc/fstab, using sudo -H gedit /etc/fstab or sudo pico /etc/fstab.

Confirm this /swapfile line in /etc/fstab... and confirm no other “swap” lines... use SPACES in this line... confirm NO TABS...

/swapfile  none  swap  sw  0  0

reboot                    # reboot and verify operation

Update #1:

Update to the latest Nvidia driver 465.31, which can be dowloaded here.