Krdytkyu

• Running Ubuntu 18.04 sever on a physical machine or VirtualBox?


• Do you need/want to use the full native resolution of your screen? Higher than 640x480 / 800x600?

Then you may be stuck as I've been, because the solution that used to work on 14.04 and 16.04 doesn't work on 18.04.

Problems to solve (goals)

1. 
   hwinfo --framebuffer gives an empty output -> find another solution


2. adding the usual lines to /etc/default/grub, only helps at the first stage of the boot. After GRUB2 has done its work, the resolution switches back to a lower value -> resolve this too


3. exclude xorg based tools like xrandr (this is a server without GUI by default)


4. increase VT1-7 (CTRL + ALT + F1, F2 - F7 ) resolution in case of Desktop systems with a GUI


5. set the resolution to 1280x1024

1. Get supported video mode (use vbeinfo instead of hwinfo)

• reboot


• hold down SHIFT after the BIOS/UEFI finished


• press `c´ for the GRUB command line


• type vbeinfo, then hit ENTER


• take a note about the supported video mode you need Mode 0x031b: 1280x1024 (+3840), 24 bits
  


• reboot

2. Modify / add the following lines to /etc/default/grub to match the ones below

>     GRUB_CMDLINE_LINUX_DEFAULT="video=0x0345 gfxpayload=true"

>     GRUB_CMDLINE_LINUX="video=0x0345 gfxpayload=true"

>     ...

>     # The resolution used on graphical terminal

>     # note that you can use only modes which your graphic card supports via VBE

>     # you can see them in real GRUB with the command `vbeinfo'

>     GRUB_GFXMODE=1280x1024x24

>     GRUB_GFXPAYLOAD=1280x1024x24

>     GRUB_GFXPAYLOAD_LINUX=1280x1024x24

3. Update GRUB

sudo update-grub

4. Reboot

sudo reboot

Note1: I've tested the above solution with Ubuntu 18.04 Server and Desktop on VirtualBox.

Note2: Didn't include linux terminal (emulator), putty, cygwin, conemu and other fancy tools, because this is about the bare console.

None of the sources I used had a complete solution, but putting the parts together, solved the problem for me.

Change Ubuntu Server 14.04 Screen Resolution

https://ubuntuforums.org/archive/index.php/t-1468789.html