Raspberry Pi: Difference between revisions

On boot the RPi configures a display with a virtual resolution of 2x2 pixel scaled to full screen. Each pixel has a different color and the hardware scaling interpolates the colors to show a nice color fade. So before you do anything first connect a monitor and see to it that you get some output.

For a framebuffer you have to learn how to

[https://github.com/raspberrypi/firmware/wiki/Accessing-mailboxes access mailboxes]. And then you have to send the GPU some [https://github.com/raspberrypi/firmware/wiki/Mailbox-property-interface mail].

Start with a single simple querry at first and then build up more complex mails. If you get it working then I recommend just altering the virtual size and color depth and leaving the physical resolution as is. The RPi seems to do a fine job of detecting the monitor and the user can also configure a resolution in the boot config files on the SD card. Best to honor his wishes.