RC101S 10.1

GaryGary
in Elecrow Display
Hi, I purchased this on September 2022, and it has been working OK. I needed to unplug it and move it, but when plugging back in it is lighting up but not showing the normal boot screen with the elecrow logo - not even the "No Signal" message when nothing is connected.
What can I do to diagnose this issue?
Cheers
Gary

Comments

  • adminadmin
    @Gary Hi, please test whether the screen can work normally under the original connection and working environment.
  • GaryGary
    Hi,
    I did this as I only unplugged it to move it, and then re-connected it (so it was all as before).
    I've also tried a separate power connector (not using the connected RPI4) and it lights up so you can see it has power, however it never gets to the Elecrow logo.
    Cheers
    Gary
  • adminadmin
    edited December 2022
    @Gary Could you please try to connect it to a laptop/PC as a second screen and see if there will display something? If this will not help, please contact with order@elecrow.com for costumer service.
  • GaryGary
    I've connected it as a second display to a windows 10 laptop, and the laptop sees the display (as it will allow me to expand the desktop to it).
    However there is no content being displayed (although the mouse will move across to the RC101S display as though it is on).
    As there is no onscreen display I cannot use the rocker on the RC101S to change the brightness.
    Is this a fault and now needs to be progressed via customer services?
    Cheers
    Gary
  • GeorgeYGeorgeY
    edited February 20

    Hi, I really like the monitor for my RaspberryPI4, but unfortunately there is a small problem:

    I am using it with Ubuntu64 and it only works with deprecated "fake" kms driver: vc4-fkms-v3d

    When the system switches to kms driver (vc4-kms-v3d) the picture does not appear anymore.

    dmesg output "vc4-drm gpu: [drm] Cannot find any crtc or sizes" indicates that it failed to parse monitor EDID.

    I would set up the custom hdmi mode, but for that I need to know display's parameters:

    hdmi_timings=<h_active_pixels> <h_sync_polarity> <h_front_porch> <h_sync_pulse> <h_back_porch> <v_active_lines> <v_sync_polarity> <v_front_porch> <v_sync_pulse> <v_back_porch> <v_sync_offset_a> <v_sync_offset_b> <pixel_rep> <frame_rate> <interlaced> <pixel_freq> <aspect_ratio>

    Some of the parameters I know (i.e. h_active_pixels, frame_rate, pixel_freq, aspect_ratio) but some I do not:

    <h_sync_polarity> = invert hsync polarity

    <h_front_porch>  = horizontal forward padding from DE active edge

    <h_sync_pulse>  = hsync pulse width in pixel clocks

    <h_back_porch>  = vertical back padding from DE active edge

    <v_active_lines> = vertical pixels height (lines)

    <v_sync_polarity> = invert vsync polarity

    <v_front_porch>  = vertical forward padding from DE active edge

    <v_sync_pulse>  = vsync pulse width in pixel clocks

    <v_back_porch>  = vertical back padding from DE active edge

    Could you help me with those? Or just provide data sheet on the panel.

    Thank you!

  • GeorgeYGeorgeY

    Note that values taken from EDID info (which is available when fkms is used) do not work:

    hdmi_timings based on EDID:

    hdmi_force_hotplug=1
hdmi_group=2
hdmi_mode=87
hdmi_force_mode=1
#hdmi_cvt=1920 1080 60 3 0 0 0
hdmi_timings=1920 0 88 44 148 1080 0 4 5 36 0 0 0 60 0 124416000 3

    EDID:

    edid-decode (hex):


00 ff ff ff ff ff ff 00 53 04 00 00 01 01 01 01
00 3a 01 03 80 00 00 78 ea 53 a5 a7 56 52 9c 26
11 50 54 21 08 00 81 00 81 40 81 80 95 00 b3 00
8b c0 a9 40 01 01 02 3a 80 18 71 38 2d 40 58 2c
45 00 00 00 00 00 00 1e 7f 21 56 aa 51 00 1e 30
46 8f 33 00 00 00 00 00 00 1e 00 00 00 fd 00 38
3e 1e 53 19 00 0a 20 20 20 20 20 20 00 00 00 fc
00 48 44 4d 49 0a 20 20 20 20 20 20 20 20 01 bd


02 03 1d f1 4a 90 04 03 02 1f 13 12 11 05 14 23
09 7f 07 83 01 00 00 65 03 0c 00 10 00 02 3a 80
18 71 38 2d 40 58 2c 45 00 00 00 00 00 00 1e 01
1d 00 72 51 d0 1e 20 6e 28 55 00 00 00 00 00 00
1e 8c 0a d0 8a 20 e0 2d 10 10 3e 96 00 00 00 00
00 00 18 01 1d 80 18 71 1c 16 20 58 2c 25 00 00
00 00 00 00 9e 00 00 00 00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 30


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


Block 0, Base EDID:
  EDID Structure Version & Revision: 1.3
  Vendor & Product Identification:
    Manufacturer: TXD
    Model: 0
    Serial Number: 16843009
    Made in: 2048
  Basic Display Parameters & Features:
    Digital display
    Image size is variable
    Gamma: 2.20
    DPMS levels: Standby Suspend Off
    RGB color display
    First detailed timing is the preferred timing
  Color Characteristics:
    Red  : 0.6533, 0.3369
    Green: 0.3203, 0.6123
    Blue : 0.1503, 0.0683
    White: 0.3134, 0.3291
  Established Timings I & II:
    DMT 0x04:   640x480    59.940476 Hz   4:3     31.469 kHz     25.175000 MHz
    DMT 0x09:   800x600    60.316541 Hz   4:3     37.879 kHz     40.000000 MHz
    DMT 0x10:  1024x768    60.003840 Hz   4:3     48.363 kHz     65.000000 MHz
  Standard Timings:
    DMT 0x1c:  1280x800    59.810326 Hz  16:10    49.702 kHz     83.500000 MHz
    DMT 0x20:  1280x960    60.000000 Hz   4:3     60.000 kHz    108.000000 MHz
    DMT 0x23:  1280x1024   60.019740 Hz   5:4     63.981 kHz    108.000000 MHz
    DMT 0x2f:  1440x900    59.887445 Hz  16:10    55.935 kHz    106.500000 MHz
    DMT 0x3a:  1680x1050   59.954250 Hz  16:10    65.290 kHz    146.250000 MHz
    GTF     :  1360x765    60.000341 Hz  16:9     47.520 kHz     84.396000 MHz
    DMT 0x33:  1600x1200   60.000000 Hz   4:3     75.000 kHz    162.000000 MHz
  Detailed Timing Descriptors:
    DTD 1:  1920x1080   60.000000 Hz  16:9     67.500 kHz    148.500000 MHz
                 Hfront   88 Hsync  44 Hback  148 Hpol P
                 Vfront    4 Vsync   5 Vback   36 Vpol P
    DTD 2:  1366x768    59.964364 Hz 683:384   47.852 kHz     85.750000 MHz
                 Hfront   70 Hsync 143 Hback  213 Hpol P
                 Vfront    3 Vsync   3 Vback   24 Vpol P
    Display Range Limits:
      Monitor ranges (GTF): 56-62 Hz V, 30-83 kHz H, max dotclock 250 MHz
    Display Product Name: 'HDMI'
  Extension blocks: 1
Checksum: 0xbd


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


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   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  31:  1920x1080   50.000000 Hz  16:9     56.250 kHz    148.500000 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   5:  1920x1080i  60.000000 Hz  16:9     33.750 kHz     74.250000 MHz
    VIC  20:  1920x1080i  50.000000 Hz  16:9     28.125 kHz     74.250000 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
  Detailed Timing Descriptors:
    DTD 3:  1920x1080   60.000000 Hz  16:9     67.500 kHz    148.500000 MHz
                 Hfront   88 Hsync  44 Hback  148 Hpol P
                 Vfront    4 Vsync   5 Vback   36 Vpol P
    DTD 4:  1280x720    60.000000 Hz  16:9     45.000 kHz     74.250000 MHz
                 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
                 Hfront   16 Hsync  62 Hback   60 Hpol N
                 Vfront    9 Vsync   6 Vback   30 Vpol N
    DTD 6:  1920x1080i  60.000000 Hz  16:9     33.750 kHz     74.250000 MHz
                 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
Checksum: 0x30
  • adminadmin

    @GeorgeY Hi George, please try 

    hdmi_timings=1024 1 50 18 50 600 1 15 3 15 0 0 0 60 0 40000000 3


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