[Bug 209821] UEFI - installation media hangs when booting on ASUS P6P67 DELUXE

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=209821

--- Comment #76 from Dani <i.dani@outlook.com> ---
Hey David & Konstantin

First of all thanks a lot for your work and also for taking a look at 12.3 and
providing a patch for it! That is really much appreciated.

I've patched our FBSD 12.3, rebuilt and installed everything. Sadly it didn't
fix the problem for us. But while testing we found out the following behavior:

Our Hardware: HPE ProLiant BL460c Gen10

We did the following steps:
1) Install the patched version of 12.3 and shutdown afterwards
2) Attach to the virtual serial port (COM1) via "Integrated LightsOut" to
monitor boot process
3) "Cold Boot" the server
-> Boot OK, no hang / error
2) Normal Reboot with "shutdown -r now"
-> Boot OK, no Hang / Error
3) Detach from virtual serial port (COM1)
4) Normal Reboot with "shutdown -r now" 
-> Broken. Hangs after "EFI Framebuffer" is printed (see below)
5) "Cold Boot" the server
-> Still Broken.
6) Reatach to virtual serial port (COM1)
7) Reset the server via "ILO"
-> Boot OK, no hang / error

This only happens when using the "loader.efi" from 12.3 (or 12.2). When we copy
the loader.efi from 12.1 to the EFI-Partition (/efi/boot/BOOTx64.efi) the
server boots and works totally fine in any configuration.

Here's the last printed output befor the hang:
EFI framebuffer information:
addr, size     0xd8000000, 0x300000
dimensions     1024 x 768
stride         1024
masks          0x00ff0000, 0x0000ff00, 0x000000ff, 0xff000000


To be honest: I'm not sure if this has the same root cause. Also i'm not quite
sure on how to debug this any further.. If you have any input or idea - we'd be
very happy for your reply!

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