Creating a custom module for LCD

[BoringName]

I currently have a TV box with @Nick A Armbian-unofficial_25.05.0-trunk_x98h_bookworm_edge_6.12.11_xfce_desktop.img.

 

I have installed linux-headers-edge-sunxi64_25.05.0-trunk_arm64__6.12.11 from the same repository.

 

I'm trying to build a custom module to get the LCD working but I keep coming up against a Exec Format Error which implies a mismatch between the build version and the installed version. But I can't find the cause. I have been following the build instructions for tm16xx-display which hasn't been a smooth process. I've had to remove some forward slashes in the Makefile so it would find the drivers/auxdisplay folder and the line-display.mod.c file it created had entries with multiple double quotes that caused errors. I had to change ""LINEDISP"" to "'LINEDISP'" before it would build. I should also mention I have previously tried OpenVFD and come up with the exact same issue so I don't think it's related to tm16xx.

uname - r

6.12.11-edge-sunxi64

Vermagic of the module

6.12.11-edge-sunxi64 SMP preempt mod_unload aarch64

uname -a

Linux x98h 6.12.11-edge-sunxi64 #1 SMP PREEMPT Thu Jan 23 11:23:05 EST 2025 aarch64 GNU/LINUX

 

I have little experience with building things in Linux. Am I missing something simple?

Is "PREEMPT" listed in all caps in uname -a an issue when the vermagic line is lower case?

What about mod_unload?

 

Any other ideas? I've been googling all day and got nowhere. Most results show different version between uname and vermagic which isn't the case here as far as I can tell. I guess I just need to know if it's possible to build custom modules with armbian images or if it's something that just doesn't work and I should forget about it.

Thanks.

[BoringName]

Some other info that may be relevant. Pretty much the only thing I could find that seemed to indicate different versions.

cat /proc/version

Linux Version 6.12.11-edge-sunxi64 (build@armbian) (aarch64-linux-gnu-gcc (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0, GNU ld (GNU Binutils for Ubuntu) 2.38) #1 SMP PREEMPT Thu Jan 23 11:23:05 EST 2025 

gcc --version

gcc (Debian 12.2.0-14+deb12u1) 12.2.0

 

[Nick A]

@BoringNameHave you tried building a new image? Use the image and kernel headers from that specific build. I believe the problem exists because the DTS source was updated after the header release. I think this only effects the X98H. 

git clone https://github.com/NickAlilovic/build
cd build

./compile.sh

Edited 1 hour ago by Nick A