Fix: High-Resolution Display Issue on ASUS ESC N8-E11V OOB Management & Ubuntu Server 24.04

Fix: High-Resolution Display Issue on ASUS ESC N8-E11V OOB Management & Ubuntu Server 24.04

When using the ASUS ESC N8-E11V server with Out-of-Band (OOB) Management via BMC (Baseboard Management Controller), users have reported that:

  • The remote KVM session (accessed via HTTPS GUI) defaults to an unusually high resolution (1920x1200), causing constant scrolling on standard displays.

  • This persists even though the Ubuntu Server 24.04 installation has no GUI and is configured in GRUB for a lower resolution (1024x768).

The high resolution displayed through OOB KVM is not directly governed by the OS settings but by the virtual display resolution provided by the BMC. In the ASUS ESC N8-E11V, the BMC's default KVM resolution is set high to support modern displays, which may cause issues when accessed from screens with standard or lower resolutions.

Additionally, while the OS (Ubuntu Server) boots with specified VGA settings, unless explicitly configured, it doesn't enforce the resolution persistently across all boot stages, especially for the console and KVM views.

Solution: Forcing Persistent 1024x768 Resolution

1. Update GRUB Settings

Edit the default GRUB configuration file:
  1. sudo nano /etc/default/grub

Modify or ensure the following lines are set:

  1. GRUB_GFXMODE=1024x768
GRUB_GFXPAYLOAD_LINUX=keep

Explanation:

  • GRUB_GFXMODE sets the initial GRUB menu resolution.

  • GRUB_GFXPAYLOAD_LINUX=keep tells the Linux kernel to retain the resolution set by GRUB during OS boot.

After saving changes, update GRUB and reboot:

  1. sudo update-grub
  2. sudo reboot


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