Dark screen with Raspberry Pi 5

caco3 · January 3, 2025 at 8:43 PM

I have a working setup with a RPi3 and a ViewSonic VP2770-LED monitor (connected through HDMI). This works fine, but I want to switch to a RPi5.

So I setup a new SD-card for the RPi5 and booted it with the monitor connected. How ever the screen always stays black.

I know that the SD-card is setup correctly because if I use the RPi5 with a HDMI-DVI-Adapter, the monitor works correctly (obviously without sound). So there must be a difference in the way the RPi5 and the RPi3 handle the HDMI signal.

The micro-HDMI-to-HDMI cable also is ok because it works (with the RPi5) on a different monitor.

I already followed https://wiki.libreelec.tv/configuration/edid#generic-x86_64 and did a getedid create on both RPis and compared the bin file, they are identical.

caco3 · January 3, 2025 at 9:51 PM

Additional info:

The RPi5 and the Viewsonic monitor also work together with HDMI, if I boot first with using the DVI input and then switch over to the HDMI input. But after a restart, it is black again (even when I run another getedid create).

**chewitt** · January 4, 2025 at 6:07 AM

RPi3 and RPi5 have completely different display hardware so the comparison isn't particularly relevant. Anyway..

Boot the RPi5 board using the latest LE13 nightly and update firmware. If there's no improvement, remove the SD card and boot the board. The firmware will show a bunch of display info on the screen - take a pic and share this. You can also share the EDID file that you captured so the RPi developers can have a look at it. NB: EDID capture only solves the problem of the RPi board being turned on before the TV (so it thinks the TV is connected). If the board dislikes the EDID data (or more often, there is a problem with the EDID data) capturing the file doesn't magically fix anything.

caco3 · January 4, 2025 at 9:48 AM

Thanks for your response!

I found now a micro-HDMI-to-HDMI-Adapter in my cable box. Oddly, this way, HDMI works. So the original cable seems to habe an issue, but just with this screen. So for me that is a working solution.

Some extra notes:

I already am on the nightly build of the 2024-12-30. Also I already updated the firmware (EEPROM-Bootloader), it was on 2023-12-06.

Nevertheless not even the RPi Diagnostic Screen gets shown (Waited several minutes)!

Then I connected both RPi-HDMI outputs to the same screen, one on HDMI, the other on DVI. This way I can see the diagnostics page. interestingly, both EDID are shown as ok:

Below the decoded EDID data. The fact that it can be read out should be a prove that the communication between monitor and RPi id bidirectional, right?

Code

edid-decode /storage/.config/firmware/edid/edid-HDMI-A-1.bin 
edid-decode (hex):

00 ff ff ff ff ff ff 00 5a 63 2b 83 01 01 01 01
32 16 01 03 80 3c 22 78 2e 25 95 a9 54 4f a1 26
0a 50 54 bf ef 80 b3 00 a9 40 a9 c0 95 00 81 80
01 01 01 01 01 01 02 3a 80 18 71 38 2d 40 58 2c
25 00 55 50 21 00 00 1e 00 00 00 ff 00 54 35 36
31 32 35 30 30 30 31 32 35 0a 00 00 00 fd 00 32
4b 0f 5e 1b 00 0a 20 20 20 20 20 20 00 00 00 fc
00 56 50 32 37 37 30 20 53 45 52 49 45 53 01 54

02 03 2a f1 55 90 05 04 03 02 07 06 08 09 0e 0f
1f 14 13 12 11 15 16 1d 1e 01 23 09 7f 07 83 01
00 00 67 03 0c 00 10 00 01 36 02 3a 80 18 71 38
2d 40 58 2c 45 00 55 50 21 00 00 1e 01 1d 80 18
71 1c 16 20 58 2c 25 00 55 50 21 00 00 9e 01 1d
00 72 51 d0 1e 20 6e 28 55 00 55 50 21 00 00 1e
8c 0a d0 8a 20 e0 2d 10 10 3e 96 00 55 50 21 00
00 18 00 00 00 00 00 00 00 00 00 00 00 00 00 25

----------------

Block 0, Base EDID:
  EDID Structure Version & Revision: 1.3
  Vendor & Product Identification:
    Manufacturer: VSC
    Model: 33579
    Serial Number: 16843009 (0x01010101)
    Made in: week 50 of 2012
  Basic Display Parameters & Features:
    Digital display
    Maximum image size: 60 cm x 34 cm
    Gamma: 2.20
    DPMS levels: Off
    RGB color display
    Default (sRGB) color space is primary color space
    First detailed timing is the preferred timing
  Color Characteristics:
    Red  : 0.6601, 0.3300
    Green: 0.3095, 0.6298
    Blue : 0.1503, 0.0400
    White: 0.3134, 0.3291
  Established Timings I & II:
    IBM     :   720x400    70.081663 Hz   9:5     31.467 kHz     28.320000 MHz
    DMT 0x04:   640x480    59.940476 Hz   4:3     31.469 kHz     25.175000 MHz
    Apple   :   640x480    66.666667 Hz   4:3     35.000 kHz     30.240000 MHz
    DMT 0x05:   640x480    72.808802 Hz   4:3     37.861 kHz     31.500000 MHz
    DMT 0x06:   640x480    75.000000 Hz   4:3     37.500 kHz     31.500000 MHz
    DMT 0x08:   800x600    56.250000 Hz   4:3     35.156 kHz     36.000000 MHz
    DMT 0x09:   800x600    60.316541 Hz   4:3     37.879 kHz     40.000000 MHz
    DMT 0x0a:   800x600    72.187572 Hz   4:3     48.077 kHz     50.000000 MHz
    DMT 0x0b:   800x600    75.000000 Hz   4:3     46.875 kHz     49.500000 MHz
    Apple   :   832x624    74.551266 Hz   4:3     49.726 kHz     57.284000 MHz
    DMT 0x10:  1024x768    60.003840 Hz   4:3     48.363 kHz     65.000000 MHz
    DMT 0x11:  1024x768    70.069359 Hz   4:3     56.476 kHz     75.000000 MHz
    DMT 0x12:  1024x768    75.028582 Hz   4:3     60.023 kHz     78.750000 MHz
    DMT 0x24:  1280x1024   75.024675 Hz   5:4     79.976 kHz    135.000000 MHz
    Apple   :  1152x870    75.061550 Hz 192:145   68.681 kHz    100.000000 MHz
  Standard Timings:
    DMT 0x3a:  1680x1050   59.954250 Hz  16:10    65.290 kHz    146.250000 MHz
    DMT 0x33:  1600x1200   60.000000 Hz   4:3     75.000 kHz    162.000000 MHz
    DMT 0x53:  1600x900    60.000000 Hz  16:9     60.000 kHz    108.000000 MHz (RB)
    DMT 0x2f:  1440x900    59.887445 Hz  16:10    55.935 kHz    106.500000 MHz
    DMT 0x23:  1280x1024   60.019740 Hz   5:4     63.981 kHz    108.000000 MHz
  Detailed Timing Descriptors:
    DTD 1:  1920x1080   60.000000 Hz  16:9     67.500 kHz    148.500000 MHz (597 mm x 336 mm)
                 Hfront   88 Hsync  44 Hback  148 Hpol P
                 Vfront    2 Vsync   5 Vback   38 Vpol P
    Display Product Serial Number: 'T56125000125'
    Display Range Limits:
      Monitor ranges (GTF): 50-75 Hz V, 15-94 kHz H, max dotclock 270 MHz
    Display Product Name: 'VP2770 SERIES'
  Extension blocks: 1
Checksum: 0x54

----------------

Block 1, CTA-861 Extension Block:
  Revision: 3
  Underscans IT Video Formats by default
  Basic audio support
  Supports YCbCr 4:4:4
  Supports YCbCr 4:2:2
  Native detailed modes: 1
  Video Data Block:
    VIC  16:  1920x1080   60.000000 Hz  16:9     67.500 kHz    148.500000 MHz (native)
    VIC   5:  1920x1080i  60.000000 Hz  16:9     33.750 kHz     74.250000 MHz
    VIC   4:  1280x720    60.000000 Hz  16:9     45.000 kHz     74.250000 MHz
    VIC   3:   720x480    59.940060 Hz  16:9     31.469 kHz     27.000000 MHz
    VIC   2:   720x480    59.940060 Hz   4:3     31.469 kHz     27.000000 MHz
    VIC   7:  1440x480i   59.940060 Hz  16:9     15.734 kHz     27.000000 MHz
    VIC   6:  1440x480i   59.940060 Hz   4:3     15.734 kHz     27.000000 MHz
    VIC   8:  1440x240    60.054449 Hz   4:3     15.734 kHz     27.000000 MHz
    VIC   9:  1440x240    60.054449 Hz  16:9     15.734 kHz     27.000000 MHz
    VIC  14:  1440x480    59.940060 Hz   4:3     31.469 kHz     54.000000 MHz
    VIC  15:  1440x480    59.940060 Hz  16:9     31.469 kHz     54.000000 MHz
    VIC  31:  1920x1080   50.000000 Hz  16:9     56.250 kHz    148.500000 MHz
    VIC  20:  1920x1080i  50.000000 Hz  16:9     28.125 kHz     74.250000 MHz
    VIC  19:  1280x720    50.000000 Hz  16:9     37.500 kHz     74.250000 MHz
    VIC  18:   720x576    50.000000 Hz  16:9     31.250 kHz     27.000000 MHz
    VIC  17:   720x576    50.000000 Hz   4:3     31.250 kHz     27.000000 MHz
    VIC  21:  1440x576i   50.000000 Hz   4:3     15.625 kHz     27.000000 MHz
    VIC  22:  1440x576i   50.000000 Hz  16:9     15.625 kHz     27.000000 MHz
    VIC  29:  1440x576    50.000000 Hz   4:3     31.250 kHz     54.000000 MHz
    VIC  30:  1440x576    50.000000 Hz  16:9     31.250 kHz     54.000000 MHz
    VIC   1:   640x480    59.940476 Hz   4:3     31.469 kHz     25.175000 MHz
  Audio Data Block:
    Linear PCM:
      Max channels: 2
      Supported sample rates (kHz): 192 176.4 96 88.2 48 44.1 32
      Supported sample sizes (bits): 24 20 16
  Speaker Allocation Data Block:
    FL/FR - Front Left/Right
  Vendor-Specific Data Block (HDMI), OUI 00-0C-03:
    Source physical address: 1.0.0.0
    DVI_Dual
    Maximum TMDS clock: 270 MHz
  Detailed Timing Descriptors:
    DTD 2:  1920x1080   60.000000 Hz  16:9     67.500 kHz    148.500000 MHz (597 mm x 336 mm)
                 Hfront   88 Hsync  44 Hback  148 Hpol P
                 Vfront    4 Vsync   5 Vback   36 Vpol P
    DTD 3:  1920x1080i  60.000000 Hz  16:9     33.750 kHz     74.250000 MHz (597 mm x 336 mm)
                 Hfront   88 Hsync  44 Hback  148 Hpol P
                 Vfront    2 Vsync   5 Vback   15 Vpol P Vfront +0.5 Odd Field
                 Vfront    2 Vsync   5 Vback   15 Vpol P Vback  +0.5 Even Field
    DTD 4:  1280x720    60.000000 Hz  16:9     45.000 kHz     74.250000 MHz (597 mm x 336 mm)
                 Hfront  110 Hsync  40 Hback  220 Hpol P
                 Vfront    5 Vsync   5 Vback   20 Vpol P
    DTD 5:   720x480    59.940060 Hz   3:2     31.469 kHz     27.000000 MHz (597 mm x 336 mm)
                 Hfront   16 Hsync  62 Hback   60 Hpol N
                 Vfront    9 Vsync   6 Vback   30 Vpol N
Checksum: 0x25  Unused space in Extension Block: 13 bytes

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caco3 · January 4, 2025 at 11:13 AM

Resolved

Dark screen with Raspberry Pi 5

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