Enabling onboard GPU via SSH on HPE Servers

https://lukas.dzunko.sk/index.php/Hardware:HP_Microserver-_How_to_fix_ILO4_after_adding_second_graphics_card

SSH to the iLo interface. Ensure terminal is in VT100 mode, else it will not display the boot sequence.

# enter vsp (virtual serial port)
vsp

Wait for the bios sequence to get to the ROM-Based Setup option and press ESC+9.

# show the current video mode
SHOW CONFIG VIDEO OPTIONS

rbsu> SHOW CONFIG VIDEO OPTIONS        
Video Options
1|Optional Video Primary, Embedded Video Disabled <=
2|Optional Video Primary, Embedded Video Secondary
3|Embedded Video Primary, Optional Video Secondary

# set to option 3
SET CONFIG VIDEO OPTIONS 3
 # enter exit to rebot
exit

The iLo remote console will now show you the bios and boot screens.