Setting VNC screen resolution in 18.04

Support & Help Requests Raspberry Pi
#1

Running on Raspberry Pi 3B+ with 18.04.2 LTS.

I am unable to change the screen resolution using the settings in /boot/config.txt. I am trying to set the resolution to 1080 p which is the resolution of my laptop.

I tried hdmi_group = 2 (DMT) with hdmi_mode = 82 (1080p) and hdmi_group = 1 (CEA) and hdmi_mode = 16 (1080p). No change in resolution in either case.

I used the first of those two settings in Ubuntu 16.04 and it worked.

#2

I'm not sure if this will help as I'm not doing anything to configure the resloution since going to 18.4

  1. when running the file should be /boot/firmware/config.txt - which gets to be linked as /boot/config.txt
  2. have you tried to see what you get from
    tvservice -s
    as the current state of the display
  3. have you thought of using tools like cvt and xrandr (which I've used to configure a display for a PC wtih Mint
    Derek
#3

was this ever resolved? I have the same issue, I've tried the xandr and all, I'm able to get the resolution into the gui settings but it fails to apply them. I'm thinking it's to do with it being headless and not actually plugged in to any display