[Motorola Atrix HD] smogtdi:
No mater what, it will always be "just the phones' 720p mirrored"

going for the lapdock native resolution (if we can) will be a stretched 720p to 768p dealt by the phone graphic system instead of the HDMI monitor stretching with it's own hardware.

I will settle for the Monitor/Lapdock doing all the stretching work.

you can play with the video_mode values using the standard modes :

CEA (hdmi_group = 1)

HDMI_CEA_VGA = 1,
HDMI_CEA_480p60 = 2,
HDMI_CEA_480p60H = 3,
HDMI_CEA_720p60 = 4,
HDMI_CEA_1080i60 = 5,
HDMI_CEA_480i60 = 6,
HDMI_CEA_480i60H = 7,
HDMI_CEA_240p60 = 8,
HDMI_CEA_240p60H = 9,
HDMI_CEA_480i60_4x = 10,
HDMI_CEA_480i60_4xH = 11,
HDMI_CEA_240p60_4x = 12,
HDMI_CEA_240p60_4xH = 13,
HDMI_CEA_480p60_2x = 14,
HDMI_CEA_480p60_2xH = 15,
HDMI_CEA_1080p60 = 16,
HDMI_CEA_576p50 = 17,
HDMI_CEA_576p50H = 18,
HDMI_CEA_720p50 = 19,
HDMI_CEA_1080i50 = 20,
HDMI_CEA_576i50 = 21,
HDMI_CEA_576i50H = 22,
HDMI_CEA_288p50 = 23,
HDMI_CEA_288p50H = 24,
HDMI_CEA_576i50_4x = 25,
HDMI_CEA_576i50_4xH = 26,
HDMI_CEA_288p50_4x = 27,
HDMI_CEA_288p50_4xH = 28,
HDMI_CEA_576p50_2x = 29,
HDMI_CEA_576p50_2xH = 30,
HDMI_CEA_1080p50 = 31,
HDMI_CEA_1080p24 = 32,
HDMI_CEA_1080p25 = 33,
HDMI_CEA_1080p30 = 34,
HDMI_CEA_480p60_4x = 35,
HDMI_CEA_480p60_4xH = 36,
HDMI_CEA_576p50_4x = 37,
HDMI_CEA_576p50_4xH = 38,
HDMI_CEA_1080i50_rb = 39,
HDMI_CEA_1080i100 = 40,
HDMI_CEA_720p100 = 41,
HDMI_CEA_576p100 = 42,
HDMI_CEA_576p100H = 43,
HDMI_CEA_576i100 = 44,
HDMI_CEA_576i100H = 45,
HDMI_CEA_1080i120 = 46,
HDMI_CEA_720p120 = 47,
HDMI_CEA_480p120 = 48,
HDMI_CEA_480p120H = 49,
HDMI_CEA_480i120 = 50,
HDMI_CEA_480i120H = 51,
HDMI_CEA_576p200 = 52,
HDMI_CEA_576p200H = 53,
HDMI_CEA_576i200 = 54,
HDMI_CEA_576i200H = 55,
HDMI_CEA_480p240 = 56,
HDMI_CEA_480p240H = 57,
HDMI_CEA_480i240 = 58,
HDMI_CEA_480i240H = 59,
HDMI_CEA_720p24 = 60,
HDMI_CEA_720p25 = 61,
HDMI_CEA_720p30 = 62,
HDMI_CEA_1080p120 = 63,
HDMI_CEA_1080p100 = 64

DMT (hdmi_group = 2)

HDMI_DMT_640x350_85 = 0x1, /**<640x350 */
HDMI_DMT_640x400_85 = 0x2, /**<640x400 */
HDMI_DMT_IBM_VGA_85 = 0x3, /**<720x400 */
HDMI_DMT_VGA_60 = 0x4, /**<640x480 (60Hz is same as VGA in CEA above) */
HDMI_DMT_VGA_72 = 0x5,
HDMI_DMT_VGA_75 = 0x6,
HDMI_DMT_VGA_85 = 0x7,
HDMI_DMT_SVGA_56 = 0x8, /**<800x600 */
HDMI_DMT_SVGA_60 = 0x9,
HDMI_DMT_SVGA_72 = 0xA,
HDMI_DMT_SVGA_75 = 0xB,
HDMI_DMT_SVGA_85 = 0xC,
HDMI_DMT_SVGA_120 = 0xD,
HDMI_DMT_848x480_60 = 0xE, /**<848x480 */
HDMI_DMT_XGA_43 = 0xF, /**<1024x768 – interlaced, DO NOT USE */
HDMI_DMT_XGA_60 = 0x10, /**<1024x768 */
HDMI_DMT_XGA_70 = 0x11,
HDMI_DMT_XGA_75 = 0x12,
HDMI_DMT_XGA_85 = 0x13,
HDMI_DMT_XGA_120 = 0x14,
HDMI_DMT_XGAP_75 = 0x15, /**<1152x864 */
HDMI_DMT_WXGA_RB = 0x16, /**<1280x768 reduced blanking */
HDMI_DMT_WXGA_60 = 0x17,
HDMI_DMT_WXGA_75 = 0x18,
HDMI_DMT_WXGA_85 = 0x19,
HDMI_DMT_WXGA_120 = 0x1A, /**<120Hz with reduced blanking */
HDMI_DMT_1280x800_RB = 0x1B, /**<1280x800 reduced blanking */
HDMI_DMT_1280x800_60 = 0x1C,
HDMI_DMT_1280x800_75 = 0x1D,
HDMI_DMT_1280x800_85 = 0x1E,
HDMI_DMT_1280x800_120 = 0x1F, /** reduced blanking */
HDMI_DMT_1280x960_60 = 0x20, /**<1280x960 */
HDMI_DMT_1280x960_85 = 0x21,
HDMI_DMT_1280x960_120 = 0x22, /** reduced blanking */
HDMI_DMT_SXGA_60 = 0x23, /**<1280x1024 */
HDMI_DMT_SXGA_75 = 0x24,
HDMI_DMT_SXGA_85 = 0x25,
HDMI_DMT_SXGA_120 = 0x26, /** reduced blanking */
HDMI_DMT_1360x768_60 = 0x27, /**<1360x768 */
HDMI_DMT_1360x768_120 = 0x28, /**<120 Hz with reduced blanking */
HDMI_DMT_SXGAP_RB = 0x29, /**<1400x1050 reduced blanking */
HDMI_DMT_SXGAP_60 = 0x2A,
HDMI_DMT_SXGAP_75 = 0x2B,
HDMI_DMT_SXGAP_85 = 0x2C,
HDMI_DMT_SXGAP_120 = 0x2D, /** reduced blanking */
HDMI_DMT_1440x900_RB = 0x2E, /**<1440x900 reduced blanking */
HDMI_DMT_1440x900_60 = 0x2F,
HDMI_DMT_1440x900_75 = 0x30,
HDMI_DMT_1440x900_85 = 0x31,
HDMI_DMT_1440x900_120 = 0x32, /** reduced blanking */
HDMI_DMT_UXGA_60 = 0x33, /**<1600x1200 60Hz */
HDMI_DMT_UXGA_65 = 0x34,
HDMI_DMT_UXGA_70 = 0x35,
HDMI_DMT_UXGA_75 = 0x36,
HDMI_DMT_UXGA_85 = 0x37,
HDMI_DMT_UXGA_120 = 0x38, /** reduced blanking */
HDMI_DMT_SWXGAP_RB = 0x39, /**<1680x1050 reduced blanking */
HDMI_DMT_SWXGAP_60 = 0x3A, /**<1680x1050 60Hz */
HDMI_DMT_SWXGAP_75 = 0x3B,
HDMI_DMT_SWXGAP_85 = 0x3C,
HDMI_DMT_SWXGAP_120 = 0x3D, /** reduced blanking */
HDMI_DMT_1792x1344_60 = 0x3E, /**<1792x1344 60Hz */
HDMI_DMT_1792x1344_75 = 0x3F, /**<1792x1344 75Hz */
HDMI_DMT_1792x1344_120 = 0x40, /** reduced blanking */
HDMI_DMT_1856x1392_60 = 0x41, /**<1856x1392 60Hz */
HDMI_DMT_1856x1392_75 = 0x42, /**<1856x1392 75Hz */
HDMI_DMT_1856x1392_120 = 0x43, /** reduced blanking */
HDMI_DMT_WUXGA_RB = 0x44, /**<1920x1200 reduced blanking */
HDMI_DMT_WUXGA_60 = 0x45, /**<1920x1200 60Hz */
HDMI_DMT_WUXGA_75 = 0x46, /**<1920x1200 75Hz */
HDMI_DMT_WUXGA_85 = 0x47, /**<1920x1200 85Hz */
HDMI_DMT_WUXGA_120 = 0x48, /** reduced blanking */
HDMI_DMT_1920x1440_60 = 0x49, /**<1920x1440 60Hz */
HDMI_DMT_1920x1440_75 = 0x4A, /**<1920x1440 75Hz */
HDMI_DMT_1920x1440_120 = 0x4B, /** reduced blanking */
HDMI_DMT_2560x1600_RB = 0x4C, /**<2560x1600 reduced blanking */
HDMI_DMT_2560x1600_60 = 0x4D, /**<2560x1600 60 Hz */
HDMI_DMT_2560x1600_75 = 0x4E, /**<2560x1600 75 Hz */
HDMI_DMT_2560x1600_85 = 0x4E, /**<2560x1600 85 Hz */
HDMI_DMT_2560x1600_120 = 0x50, /** reduced blanking */
HDMI_DMT_1366x768_60 = 0x51, /**<1366x768 60Hz */
HDMI_DMT_1080p_60 = 0x52, /**<Same as 1080p60 in CEA above */
HDMI_DMT_1600x900_RB = 0x53, /**<1600x900 reduced blanking */
HDMI_DMT_2048x1152_RB = 0x54, /**<2048x1152 reduced blanking */
HDMI_DMT_720p_60 = 0x55, /**<Same as 720p60 in CEA above */
HDMI_DMT_1366x768_RB = 0x56, /**<1366x768 reduced blanking */