Bug ID 554461: Serial-based Virtual Edition (VE) consoles do not display boot messages.

Last Modified: Oct 16, 2023

Affected Product(s):
BIG-IP MA-VE(all modules)

Known Affected Versions:
11.3.0, 11.4.0, 11.4.1, 11.5.0, 11.5.1, 11.5.2, 11.5.3, 11.5.4, 11.5.5, 11.5.6, 11.5.7, 11.5.8, 11.5.9, 11.5.10, 11.6.0, 11.6.1, 11.6.2, 11.6.3,,,,, 11.6.4, 11.6.5,,,, 12.0.0, 12.0.0 HF1, 12.1.0 HF1, 12.0.0 HF2, 12.1.0 HF2, 12.0.0 HF3, 12.0.0 HF4, 12.1.1 HF1, 12.1.1 HF2, 12.1.2 HF1, 12.1.2 HF2, 12.1.0, 12.1.1, 12.1.2, 12.1.3,,,,,,,, 12.1.4,, 12.1.5,,,, 12.1.6

Opened: Oct 27, 2015

Severity: 3-Major


Messages do not display during bootup for serial-based Virtual Edition (VE) consoles.


Any bootup messages of interest cannot be seen on the serial console, which hinders debugging in the event of a boot failure or error.


This occurs because by design VE grub and kernel configurations defaults to vga (tty0).


To add the serial console, follow these steps: 1) Login to the VE and run the following command to edit the grub configuration: # vi $( grub_open ) 2) Add the following two lines after 'timeout=8': serial --unit=0 --speed=19200 terminal --timeout=3 serial console 3) Edit each kernel boot entry to define two consoles as follows: console=tty0 console=ttyS0 4) Write and quit the vi editor with the command :wq 5) Synchronize the grub changes to storage such that they apply on the next boot: # grub_close Note: Some Xen variants may need to specify 'hvc0' instead of 'ttyS0' for their serial console. Other Xen variants may need to specify 'ttyS1'. In all cases, leaving 'console=tty0' in place is required to keep VGA console functionality.

Fix Information


Behavior Change

Guides & references

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