If I boot OS but no display and the Q-code shows “Ad” after install RHEL 6.6/6.7 64 bit by UEFI mode, How should I do?

1. Before install OS, please go to BIOS and set the following item.

 CSM-> Disable

  or

 CSM→Enable

 Boot option filter→legacy

 Network→legacy

 Storage→legacy

 Video→legacy

 Other→legacy

2. If you have installed OS, please reboot system and into BIOS then set the following item.

  CSM-> Disable

  or

  CSM→Enable

  Boot option filter→legacy

  Network→legacy

  Storage→legacy

  Video→legacy

  Other→legacy

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