Customize VNC Session Display with New Resolution – Zentera Systems

Procedure to customize an existing VNC session display with new resolution 2560x1600:

zAccess access to the Linux server using the user account and start a terminal window.

Run "xrandr" to list the default supported resolutions as well as the display name (in red).

[alex@servops47 ~]$ xrandr
Screen 0: minimum 32 x 32, current 1024 x 768, maximum 32768 x 32768
VNC-0 connected primary 1024x768+0+0 0mm x 0mm
   1024x768     60.00*+
   1920x1200    60.00
   1920x1080    60.00
   1600x1200    60.00
   1680x1050    60.00
   1400x1050    60.00
   1360x768     60.00
   1280x1024    60.00
   1280x960     60.00
   1280x800     60.00
   1280x720     60.00
   800x600      60.00
   640x480      60.00
[alex@servops47 ~]$

Run "cvt 2560 1600" to get the modeline for the desired resolution.

[alex@servops47 ~]$ cvt 2560 1600
# 2560x1600 59.99 Hz (CVT 4.10MA) hsync: 99.46 kHz; pclk: 348.50 MHz
Modeline "2560x1600_60.00" 348.50 2560 2760 3032 3504 1600 1603 1609 1658 -hsync +vsync
[alex@servops47 ~]$

Run "xrandr --newmode " followed by the result (in red) from the previous step to set up the new mode as shown below.

[alex@servops47 ~]$ xrandr --newmode "2560x1600_60.00" 348.50 2560 2760 3032 3504 1600 1603 1609 1658 -hsync +vsync
[alex@servops47 ~]$

Run "xrandr --addmode" with the display information from step 2 to add the new mode to the list as shown below.

[alex@servops47 ~]$ xrandr --addmode VNC-0 "2560x1600_60.00"
[alex@servops47 ~]$

Run "xrandr -s" to apply the new mode and experience the new resolution.

[alex@servops47 ~]$ xrandr -s "2560x1600_60.00"
[alex@servops47 ~]$

Note: The procedure has been validated using 64-bit zLink 4.4.1-13 on CentOS 7.6.1810.

Related articles