[Shield Tablet Q&A, Help & Troubleshooting] robinmalmberg:
Is there a way to output 720P instead of 1080P on Nvidia Shield K1´s HDMI-port?

Rooted it and tried secondscreen to be able to get 720p output, but it only seems to be able to get a black screen since my video-device only can understand 720p.

Using Nougat.

02-12 19:52:42.904 D/Tchnoise( 300): #### HDMI IN mode

02-12 19:52:42.904 D/Tchnoise( 300): #### HDMI IN mode

02-12 19:52:42.904 I/TegraHDMICEC( 736): hotplug display 1 connected 1

02-12 19:52:42.905 I/hwcomposer( 291): hotplug: connected = 1

02-12 19:52:42.905 I/hwcomposer( 291): edid: Manufacturer ID: "VUF"

02-12 19:52:42.905 I/hwcomposer( 291): edid: Manufacturer Product Code: 0000

02-12 19:52:42.905 I/hwcomposer( 291): edid: Monitor name: "VUFINE 1.2"

02-12 19:52:42.905 D/hwcomposer( 291): Display 1 has RGB quant selectable: 0, YUV quant selectable: 0

02-12 19:52:42.905 D/hwcomposer( 291): Display 1 HDR capabilities: 0

02-12 19:52:42.905 D/hwcomposer( 291): Display 1: found 17 modes

02-12 19:52:42.905 W/hwcomposer( 291): New DC mode 1280 x 720 @ 60.00 Hz (RGB/8/Rec.709/limited)

02-12 19:52:42.905 W/hwcomposer( 291): New DC mode 720 x 480 @ 60.00 Hz (RGB/8/Rec.709/limited)

02-12 19:52:42.905 W/hwcomposer( 291): New DC mode 640 x 480 @ 60.00 Hz (RGB/8/Rec.709/limited)

02-12 19:52:42.905 W/hwcomposer( 291): New DC mode 800 x 600 @ 60.00 Hz (RGB/8/Rec.709/adj/limited)

02-12 19:52:42.905 W/hwcomposer( 291): New DC mode 1024 x 768 @ 60.00 Hz (RGB/8/Rec.709/limited)

02-12 19:52:42.905 W/hwcomposer( 291): New DC mode 1280 x 720 @ 120.00 Hz (RGB/8/Rec.709/adj/limited)

02-12 19:52:42.905 W/hwcomposer( 291): New DC mode 1280 x 800 @ 60.00 Hz (RGB/8/Rec.709/limited)

02-12 19:52:42.905 W/hwcomposer( 291): New DC mode 1280 x 1024 @ 60.00 Hz (RGB/8/Rec.709/adj/limited)

02-12 19:52:42.905 W/hwcomposer( 291): New DC mode 1400 x 1050 @ 60.00 Hz (RGB/8/Rec.709/limited)

02-12 19:52:42.905 W/hwcomposer( 291): New DC mode 1440 x 900 @ 60.00 Hz (RGB/8/Rec.709/limited)

02-12 19:52:42.905 W/hwcomposer( 291): New DC mode 1680 x 1050 @ 60.00 Hz (RGB/8/Rec.709/limited)

02-12 19:52:42.905 W/hwcomposer( 291): New DC mode 1600 x 1200 @ 60.00 Hz (RGB/8/Rec.709/adj/limited)

02-12 19:52:42.905 W/hwcomposer( 291): New DC mode 1920 x 1080 @ 60.00 Hz (RGB/8/Rec.709/limited)

02-12 19:52:42.905 W/hwcomposer( 291): New DC mode 1280 x 720 @ 60.00 Hz (RGB/8/Rec.709/cea/limited)

02-12 19:52:42.905 W/hwcomposer( 291): New DC mode 720 x 480 @ 60.00 Hz (RGB/8/Rec.709/cea/limited)

02-12 19:52:42.905 W/hwcomposer( 291): New DC mode 1280 x 720 @ 50.00 Hz (RGB/8/Rec.709/cea/limited)

02-12 19:52:42.905 W/hwcomposer( 291): New DC mode 720 x 576 @ 50.00 Hz (RGB/8/Rec.709/cea/limited)

02-12 19:52:42.906 D/hwcomposer( 291): Chosen mode: 12: 1920 x 1080 @ 60.00 Hz (RGB/8/Rec.709)

02-12 19:52:42.906 W/hwcomposer( 291): New DC mode 1920 x 1080 @ 60.00 Hz (RGB/8/Rec.709/limited)

02-12 19:52:42.906 D/hwcomposer( 291): display type 1: vblank period = 16666667 ns

02-12 19:52:42.906 D/hwcomposer( 291): hdcp_poll: processing pipe fd

02-12 19:52:42.906 D/hwcomposer( 291): Display 1 layer size is 0 x 0

02-12 19:52:42.906 D/hwcomposer( 291): int hwc_hotplug(void*, int, nvfb_hotplug_status): display 1 connected

02-12 19:52:42.906 D/ ( 291): signalling poll disabled

02-12 19:52:42.906 D/hwcomposer( 291): void hwc_blank_display(nvhwc_context*, int, int): display 1: [1 -> 0]

02-12 19:52:42.906 I/ ( 291): SecureHdcp_PollDisabled

02-12 19:52:42.906 D/hwcomposer( 291): Display 1 layer size is 1920 x 1080

02-12 19:52:42.906 D/hwcomposer( 291): Display 1 device size is 1920 x 1080

02-12 19:52:42.906 D/hwcomposer( 291): Display 1 device clip is (0, 0, 1920, 1080)

02-12 19:52:42.906 D/hwcomposer( 291): int hwc_getDisplayConfigs(hwc_composer_device_1*, int, uint32_t*, size_t*): disp 1: returning 17 configs

02-12 19:52:42.906 D/hwcomposer( 291): config[0] = (1920 x 1080 @ 60.00Hz)

02-12 19:52:42.906 D/hwcomposer( 291): config[0] = (1920 x 1080 @ 60.00Hz)

02-12 19:52:42.906 D/hwcomposer( 291): config[1] = (720 x 480 @ 60.00Hz)

02-12 19:52:42.906 D/hwcomposer( 291): config[1] = (720 x 480 @ 60.00Hz)

02-12 19:52:42.907 D/hwcomposer( 291): config[2] = (640 x 480 @ 60.00Hz)

02-12 19:52:42.907 D/hwcomposer( 291): config[2] = (640 x 480 @ 60.00Hz)

02-12 19:52:42.907 D/hwcomposer( 291): config[3] = (800 x 600 @ 60.00Hz)

02-12 19:52:42.907 D/hwcomposer( 291): config[3] = (800 x 600 @ 60.00Hz)

02-12 19:52:42.907 D/hwcomposer( 291): config[4] = (1024 x 768 @ 60.00Hz)

02-12 19:52:42.907 D/hwcomposer( 291): config[4] = (1024 x 768 @ 60.00Hz)

02-12 19:52:42.907 D/hwcomposer( 291): config[5] = (1280 x 720 @ 120.00Hz)

02-12 19:52:42.907 D/hwcomposer( 291): config[5] = (1280 x 720 @ 120.00Hz)

02-12 19:52:42.907 D/hwcomposer( 291): config[6] = (1280 x 800 @ 60.00Hz)

02-12 19:52:42.907 D/hwcomposer( 291): config[6] = (1280 x 800 @ 60.00Hz)

02-12 19:52:42.907 D/hwcomposer( 291): config[7] = (1280 x 1024 @ 60.00Hz)

02-12 19:52:42.907 D/hwcomposer( 291): config[7] = (1280 x 1024 @ 60.00Hz)

02-12 19:52:42.907 D/hwcomposer( 291): config[8] = (1400 x 1050 @ 60.00Hz)

02-12 19:52:42.907 D/hwcomposer( 291): config[8] = (1400 x 1050 @ 60.00Hz)

02-12 19:52:42.907 D/hwcomposer( 291): config[9] = (1440 x 900 @ 60.00Hz)

02-12 19:52:42.907 D/hwcomposer( 291): config[9] = (1440 x 900 @ 60.00Hz)

02-12 19:52:42.907 D/hwcomposer( 291): config[10] = (1680 x 1050 @ 60.00Hz)

02-12 19:52:42.907 D/hwcomposer( 291): config[10] = (1680 x 1050 @ 60.00Hz)

02-12 19:52:42.907 D/hwcomposer( 291): config[11] = (1600 x 1200 @ 60.00Hz)

02-12 19:52:42.907 D/hwcomposer( 291): config[11] = (1600 x 1200 @ 60.00Hz)

02-12 19:52:42.907 D/hwcomposer( 291): config[12] = (1280 x 720 @ 60.00Hz)

02-12 19:52:42.907 D/hwcomposer( 291): config[12] = (1280 x 720 @ 60.00Hz)

02-12 19:52:42.907 D/hwcomposer( 291): config[13] = (1280 x 720 @ 60.00Hz)

02-12 19:52:42.907 D/hwcomposer( 291): config[13] = (1280 x 720 @ 60.00Hz)

02-12 19:52:42.907 D/hwcomposer( 291): config[14] = (720 x 480 @ 60.00Hz)

02-12 19:52:42.907 D/hwcomposer( 291): config[14] = (720 x 480 @ 60.00Hz)

02-12 19:52:42.907 D/hwcomposer( 291): config[15] = (1280 x 720 @ 50.00Hz)

02-12 19:52:42.907 D/hwcomposer( 291): config[15] = (1280 x 720 @ 50.00Hz)

02-12 19:52:42.907 D/hwcomposer( 291): config[16] = (720 x 576 @ 50.00Hz)

02-12 19:52:42.907 D/hwcomposer( 291): config[16] = (720 x 576 @ 50.00Hz)

02-12 19:52:42.907 D/hwcomposer( 291): void handle_resync_event(void*): processing resync fd

02-12 19:52:42.907 D/hwcomposer( 291): hdcp_poll: processing pipe fd

02-12 19:52:42.909 V/WiredAccessoryManager( 736): Headset UEVENT: {SUBSYSTEM=switch, SEQNUM=4793, ACTION=change, SWITCH_STATE=1, SWITCH_NAME=hdmi_audio, DEVPATH=/devices/virtual/switch/hdmi_audio}

02-12 19:52:42.909 V/WiredAccessoryManager( 736): newName=hdmi_audio newState=16 headsetState=16 prev headsetState=0

02-12 19:52:42.909 D/PersonalGridService( 8835): HDMI is connected

02-12 19:52:42.909 I/WiredAccessoryManager( 736): MSG_NEW_DEVICE_STATE

02-12 19:52:42.910 V/WiredAccessoryManager( 736): headsetName: connected

02-12 19:52:42.910 I/NvAudioPolicyManager( 310): setDeviceConnectionStateInt() device: 0x400, state 1, address name

02-12 19:52:42.911 I/STBHotplugReceiver(16248): Transition status=TRANSITION_OK

02-12 19:52:42.912 W/ContextImpl(16248): Calling a method in the system process without a qualified user: android.app.ContextImpl.startActivity:797 android.content.ContextWrapper.startActivity:356 android.content.ContextWrapper.startActivity:356 com.nvidia.roth.consoleui.STBHotplugReceiver.launchConsoleModeUI:79 com.nvidia.roth.consoleui.STBHotplugReceiver.onReceive:71

02-12 19:52:42.912 W/ContextImpl(16248): Calling a method in the system process without a qualified user: android.app.ContextImpl.startActivity:811 android.app.ContextImpl.startActivity:798 android.content.ContextWrapper.startActivity:356 android.content.ContextWrapper.startActivity:356 com.nvidia.roth.consoleui.STBHotplugReceiver.launchConsoleModeUI:79

02-12 19:52:42.913 I/ActivityManager( 736): START u0 {flg=0x10000000 cmp=com.nvidia.roth.consoleui/.TVModeEnabler} from uid 1000 on display 0

02-12 19:52:42.917 I/stats ( 736): Service Connected

02-12 19:52:42.926 I/DisplayManagerService( 736): Display device added: DisplayDeviceInfo{"HDMI-skärm": uniqueId="local:1", 1920 x 1080, modeId 106, defaultModeId 106, supportedModes [{id=106, width=1920, height=1080, fps=60.0}, {id=107, width=720, height=480, fps=60.0}, {id=108, width=640, height=480, fps=60.0}, {id=109, width=800, height=600, fps=60.0}, {id=110, width=1024, height=768, fps=60.0}, {id=111, width=1280, height=720, fps=120.00001}, {id=112, width=1280, height=800, fps=60.0}, {id=113, width=1280, height=1024, fps=60.0}, {id=114, width=1400, height=1050, fps=60.0}, {id=115, width=1440, height=900, fps=60.0}, {id=116, width=1680, height=1050, fps=60.0}, {id=117, width=1600, height=1200, fps=60.0}, {id=118, width=1280, height=720, fps=60.0}, {id=119, width=1280, height=720, fps=50.0}, {id=120, width=720, height=576, fps=50.0}], colorTransformId 8, defaultColorTransformId 8, supportedColorTransforms [{id=8, colorTransform=0}], HdrCapabilities android.view.Display$HdrCapabilities@d77d05c, density 320, 320.0 x 320.0 dpi, appVsyncOff 0, presDeadline 17666667, touch EXTERNAL, rotation 0, type HDMI, state UNKNOWN, FLAG_SECURE, FLAG_SUPPORTS_PROTECTED_BUFFERS, FLAG_PRESENTATION}

02-12 19:52:42.928 D/RSMouse ( 803): mFeatureEnabled=true mPackageEnabled=true

02-12 19:52:42.948 D/hwcomposer( 291): void handle_resync_event(void*): processing resync fd

02-12 19:52:42.948 D/SurfaceFlinger( 291): Set power mode=2, type=1 flinger=0xab135000

02-12 19:52:42.948 D/hwcomposer( 291): void hwc_blank_display(nvhwc_context*, int, int): display 1: [0 -> 0]

02-12 19:52:42.949 D/hwcomposer( 291): Display 1 device size is 1920 x 1080

02-12 19:52:42.949 D/hwcomposer( 291): Display 1 device clip is (0, 0, 1920, 1080)