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When i update my OS, suddenly the resolution set's 1024 x 768, i do everything to change it back to 1920 x 1080 but nothing helps me, maybe someone know how can i solve this problem? I think the problem is in GPU : EFI, someone know how can i change it to NVIDIA?

In terminal screenfetch

                          ./+o+-       levon@levon-desktop
                  yyyyy- -yyyyyy+      OS: Ubuntu 18.04 bionic
               ://+//////-yyyyyyo      Kernel: x86_64 Linux 5.3.0-28-generic
           .++ .:/++++++/-.+sss/`      Uptime: 47m
         .:++o:  /++++++++/:--:/-      Packages: 2000
        o:+o+:++.`..```.-/oo+++++/     Shell: bash 4.4.20
       .:+o:+o/.          `+sssoo+/    Resolution: 1024x768
  .++/+:+oo+o:`             /sssooo.   DE: GNOME 
 /+++//+:`oo+o               /::--:.   WM: GNOME Shell
 \+/+o+++`o++o               ++////.   WM Theme: Adwaita
  .++.o+++oo+:`             /dddhhh.   GTK Theme: Ambiance [GTK2/3]
       .+.o+oo:.          `oddhhhh+    Icon Theme: ubuntu-mono-dark
        \+.++o+o``-````.:ohdhhhhh+     Font: Ubuntu 11
         `:o+++ `ohhhhhhhhyo++os:      CPU: Intel Core i7-7700 @ 8x 4.2GHz [36.0°C]
           .o:`.syhhhhhhh/.oo++o`      GPU: EFI
               /osyyyyyyo++ooo+++/     RAM: 1793MiB / 15977MiB
                   ````` +oo+++o\:    
                          `oo++.     

In terminal xrandr

xrandr: Failed to get size of gamma for output default
Screen 0: minimum 1024 x 768, current 1024 x 768, maximum 1024 x 768
default connected primary 1024x768+0+0 0mm x 0mm
   1024x768      76.00* 
  1920x1200_60.00 (0x2c1) 193.250MHz -HSync +VSync
        h: width  1920 start 2056 end 2256 total 2592 skew    0 clock  74.56KHz
        v: height 1200 start 1203 end 1209 total 1245           clock  59.88Hz
  1920x1080_60.00 (0x2c2) 193.250MHz -HSync +VSync
        h: width  1920 start 2056 end 2256 total 2592 skew    0 clock  74.56KHz
        v: height 1200 start 1203 end 1209 total 1245           clock  59.88Hz
  1920x1080R (0x2c3) 138.500MHz +HSync -VSync
        h: width  1920 start 1968 end 2000 total 2080 skew    0 clock  66.59KHz
        v: height 1080 start 1083 end 1088 total 1111           clock  59.93Hz 

In terminal xrandr --addmode HDMI1 1920_1080_60.00

xrandr: Failed to get size of gamma for output default
xrandr: cannot find output "HDMI1"

In terminal xrandr -q

xrandr: Failed to get size of gamma for output default
Screen 0: minimum 1024 x 768, current 1024 x 768, maximum 1024 x 768
default connected primary 1024x768+0+0 0mm x 0mm
   1024x768      76.00* 

In terminal sudo vi /etc/default/grub

GRUB_DEFAULT=0
GRUB_TIMEOUT_STYLE=hidden
GRUB_TIMEOUT=10
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
GRUB_CMDLINE_LINUX=""

In the image below i show that i use nvidia-driver-440

enter image description here

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  • Could you add the output of xrandr -q? – Eduardo Trápani Feb 14 at 23:26
  • @EduardoTrápani, added – Levon Feb 15 at 11:01

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