You said: "I've created a 320x240 16bbp framebuffer ( /dev/fb1 ) and I can disable fb0." but, then you have: [3].format = GR_FORMAT(GR_FORMAT_ ARGB8888 ) | GR_RDSWA(4), [3].bpp = 32 , Also... static const struct simplefb_platform_data simplefb_pdata = { .width = 320, .height = 240, .stride = 240 * 4, .format = "a8r8g8b8", }; NOTE, the "stride" is the length of a line in bytes.So, you should have stride = 320 * 4 But, if you really just want 16bpp, it should be 320* 2 Are you using a standard kernel (uImage) or XIP kernel?
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