Im doing some basic low level things with allegro like locking bitmaps and manipulating the memory inside.
The thing is that linux says it's in 24 bit depth and i drive my things in 32 bit depths. I need 32 bit support for linux.
I have searched how to change config to linux to 32 bit depth but nothing answer my question.
So how do i do 32 bit dev in linux?

Have you tried using al_set_new_bitmap_flags and choosing one of the 32-but flags ?

IIRC you either get 24 or 32 bit modes depending on the system. You should be able to create a video bitmap with 32 bits in any case and work on that.

But trying to force it as Dizzy Egg suggested is worth a try.

It's possible your machine doesn't support 32-bit depth. My MacBook Pro M1 has a 32-bit depth, but my MacMini only has 24. Same with my Windows laptop which only supports 24-bit depth. All of them are relatively new devices.

Similar to what Dizzy said, you can pass 32 when creating your display and see if it sticks:

int preferred_depth_size = 32;
al_set_new_display_option(ALLEGRO_DEPTH_SIZE, preferred_depth_size, ALLEGRO_SUGGEST);
ALLEGRO_DISPLAY *al_display = al_create_display(1920, 1080);
if (!al_display) print("Display could not be created");
int actual_depth_size = al_get_display_option(al_display, ALLEGRO_DEPTH_SIZE);

printf("Display depth info:\n  - expected:%d\n  - actual:%d", preferred_depth_size, actual_depth_size);

What do you need specifically a 32 bit depth for, I'm curious.