PiCapture EDID error on connecting HDMI to laptop 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, 8 months ago by woogyom.kim.
  • This reply was modified 3 years, 8 months ago by woogyom.kim.
  • This reply was modified 3 years, 8 months ago by woogyom.kim.
  • This reply was modified 3 years, 8 months ago by woogyom.kim.
woogyom.kimReply To: EDID error on connecting HDMI to laptop