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  • in reply to: EDID error on connecting HDMI to laptop #950
    woogyom.kim
    Participant

    Fedora Linux 25 is running on another laptop. It’s x86-64 system with Intel i915 graphic chip.
    Before this issue happens, I could capture 1080p HDMI output of HP laptop through raspivid commands.

    $ raspivid -o demo.h264 -t 3000 -md 1 -awb off -ex off -awbg 1.0,1.0

    Connecting HDMI out on RPi 2 to HDMI in on PiCapture – it doesn’t work.
    Only LED ‘RUN’ is blinking and LED ‘ACTIVE’ turned on and off after running the command, ‘pivideo -q all’.

    I tried to read EDID of PiCapture on my linux machine, it has no problem.

    $ git clone https://github.com/bulletmark/edid-rw
    $ cd edid-rw
    $ sudo modprobe i2c-dev
    $ sudo ./edid-rw 1 | edid-decode

    Extracted contents:
    header: 00 ff ff ff ff ff ff 00
    serial number: 32 93 d1 00 01 00 00 00 33 1a
    version: 01 03
    basic params: 81 3c 22 78 1a
    chroma info: ee d5 a5 55 48 9b 26 12 50 54
    established: 20 00 00
    standard: 3b c0 81 c0 01 01 01 01 01 01 01 01 01 01 01 01
    descriptor 1: 02 3a 80 18 71 38 2d 40 58 2c 45 00 56 50 21 00 00 1e
    descriptor 2: 02 3a 80 d0 72 38 2d 40 10 2c 45 80 56 50 21 00 00 1f
    descriptor 3: 00 00 00 fc 00 50 49 43 41 50 54 55 52 45 2d 48 44 31
    descriptor 4: 00 00 00 fd 00 37 4c 1d 51 11 00 0a 20 20 20 20 20 20
    extensions: 01
    checksum: 4a

    Manufacturer: LTS Model d1 Serial Number 1
    Made week 51 of 2016
    EDID version: 1.3
    Digital display
    DFP 1.x compatible TMDS
    Maximum image size: 60 cm x 34 cm
    Gamma: 2.20
    Supported color formats: RGB 4:4:4, YCrCb 4:4:4, YCrCb 4:2:2
    First detailed timing is preferred timing
    Established timings supported:
    640×480@60Hz
    Standard timings supported:
    720×432@60Hz
    1280×768@60Hz
    Detailed mode: Clock 148.500 MHz, 598 mm x 336 mm
    1920 2008 2052 2200 hborder 0
    1080 1084 1089 1125 vborder 0
    +hsync +vsync
    Detailed mode: Clock 148.500 MHz, 598 mm x 336 mm
    1920 2448 2492 2640 hborder 0
    1080 1084 1089 1125 vborder 0
    +hsync +vsync
    Monitor ranges: 55-76HZ vertical, 29-81kHz horizontal, max dotclock 170MHz
    Has 1 extension blocks
    Checksum: 0x4a

    Unknown extension block

    EDID block does NOT conform to EDID 1.3!
    Name descriptor not terminated with a newline

    <– end of stdout
    This EDID looks OK. I’m curious why the host machine can’t recognize the PiCapture.

    • This reply was modified 3 years, 10 months ago by woogyom.kim.
    • This reply was modified 3 years, 10 months ago by woogyom.kim.
    • This reply was modified 3 years, 10 months ago by woogyom.kim.
    • This reply was modified 3 years, 10 months ago by woogyom.kim.
    in reply to: EDID error on connecting HDMI to laptop #948
    woogyom.kim
    Participant

    Thanks for quick reply.
    I just tried both cases but I see the same error on another PC – “EDID block is all zeros”.
    I think it’s possible to reprogram EDID or firmware on PiCapture but I’m not sure this is the best solution.

    in reply to: EDID error on connecting HDMI to laptop #946
    woogyom.kim
    Participant

    * Model: HP Elitebook Folio 1020 G1
    * Video HW: Intel i915
    * OS: Elementary OS Freya 0.3.2 (Ubuntu based)

    Here is the log in this machine.

    [ 252.280805] EDID block is all zeroes
    [ 252.280810] i915 0000:00:02.0: HDMI-A-2: Ignoring invalid EDID block 1.
    [ 252.307810] [drm:drm_edid_block_valid [drm]] *ERROR* EDID has major version 0, instead of 1

    And this is the result of pivideo command on RPi + PiCapture.

    pi@raspberrypi:~ $ pivideo -q all
    PiCapture HD1 is ready
    No active video detected
    Selected video source is: auto
    Active video source is: component
    Raspberry Pi camera port is not active
    Frame skip is On
    Video processor software version: 83C103

    I didn’t do ‘pivideo -c’ but it seems EEPROM was cleared.

    Best regards,
    Milo

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woogyom.kim