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AOC I2475PXQU: Invalid display #382

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setaur opened this issue Feb 15, 2024 · 2 comments
Open

AOC I2475PXQU: Invalid display #382

setaur opened this issue Feb 15, 2024 · 2 comments
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monitor specific problems with particular monitors

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@setaur
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setaur commented Feb 15, 2024

Hello.
I'm trying to use ddcutil to control external monitor AOC I2475PXQU connected via hdmi cable into laptop Lenovo z510 with Debian 11 Bullseye onboard, but I'm hitting into a wall.
I have installed from Debian repository ddcutil version 0.9.9 and also compiled and installed from this site ddcutil 2.1.3. Both failed to control the monitor. Function DDC/CI is enabled in a AOC settings.
Manual for this monitor can be accessed here:
https://manuals.coolblue.nl/eb/aoc-bundel-collectie.pdf

ddcutil 0.9.9:

# ddcutil detect --verbose
Output level:               Verbose
Reporting DDC data errors:  false
Trace groups active:        none
Traced functions:           none
Traced files:               none
Force I2C slave address:    false
User defined features:      disabled

Performance and Retry Options:
   Deferred sleep enabled:                      false
   Sleep suppression (reduced sleeps) enabled:  false
   Dynamic sleep adjustment enabled:            false

Invalid display
   I2C bus:             /dev/i2c-5
      I2C address 0x50 (EDID) responsive: true 
      Is eDP device:                      false
      I2C address 0x37 (DDC) responsive:  true 
      /sys/bus/i2c/devices/i2c-5/name:   i915 gmbus dpb
   EDID synopsis:
      Mfg id:           AOC
      Model:            2475W1
      Serial number:    P08H4QA007082
      Manufacture year: 2017
      EDID version:     1.3
      Product code:     9333
      Binary sn:        16843009 (0x01010101)
      Extra descriptor: 
      Video input definition: 0x80 - Digital Input
      Supported features:
         DPMS active-off
         Digital display type: RGB 4:4:4
         Standard sRGB color space: False
      White x,y:        0.313, 0.329
      Red   x,y:        0.639, 0.338
      Green x,y:        0.297, 0.616
      Blue  x,y:        0.151, 0.053
      Extension blocks: 1
   EDID source: 
   EDID hex dump:
              +0          +4          +8          +c            0   4   8   c   
      +0000   00 ff ff ff ff ff ff 00 05 e3 75 24 01 01 01 01   ..........u$....
      +0010   10 1b 01 03 80 35 1e 78 2a a3 e5 a3 56 4c 9d 26   .....5.x*...VL.&
      +0020   0d 50 54 bf ef 00 d1 c0 b3 00 95 00 81 80 81 40   .PT............@
      +0030   81 c0 01 01 01 01 02 3a 80 18 71 38 2d 40 58 2c   .......:..q8-@X,
      +0040   45 00 0f 28 21 00 00 1e 00 00 00 ff 00 50 30 38   E..(!........P08
      +0050   48 34 51 41 30 30 37 30 38 32 00 00 00 fd 00 32   H4QA007082.....2
      +0060   4c 0f 53 11 00 0a 20 20 20 20 20 20 00 00 00 fc   L.S...      ....
      +0070   00 32 34 37 35 57 31 0a 20 20 20 20 20 20 01 16   .2475W1.      ..
   DDC communication failed
   Is DDC/CI enabled in the monitor's on-screen display?

Invalid display
   I2C bus:             /dev/i2c-7
      I2C address 0x50 (EDID) responsive: true 
      Is eDP device:                      true 
      /sys/bus/i2c/devices/i2c-7/name:   AUX A/port A
   EDID synopsis:
      Mfg id:           CMN
      Model:            
      Serial number:    
      Manufacture year: 2012
      EDID version:     1.4
      Product code:     5565
      Binary sn:        0 (0x00000000)
      Extra descriptor: N156BGE-EA1
      Video input definition: 0x95 - Digital Input (DisplayPort)
      Supported features:
         Digital display type: RGB 4:4:4
         Standard sRGB color space: False
      White x,y:        0.313, 0.329
      Red   x,y:        0.585, 0.354
      Green x,y:        0.338, 0.575
      Blue  x,y:        0.152, 0.118
      Extension blocks: 0
   EDID source: 
   EDID hex dump:
              +0          +4          +8          +c            0   4   8   c   
      +0000   00 ff ff ff ff ff ff 00 0d ae bd 15 00 00 00 00   ................
      +0010   11 16 01 04 95 22 13 78 02 e9 15 95 5a 56 93 27   .....".x....ZV.'
      +0020   1e 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01   .PT.............
      +0030   01 01 01 01 01 01 79 1d 56 c2 50 00 26 30 1f 41   ......y.V.P.&0.A
      +0040   4c 00 58 c2 10 00 00 18 00 00 00 fe 00 4e 31 35   L.X..........N15
      +0050   36 42 47 45 2d 45 41 31 0a 20 00 00 00 fe 00 43   6BGE-EA1. .....C
      +0060   4d 4e 0a 20 20 20 20 20 20 20 20 20 00 00 00 fe   MN.         ....
      +0070   00 4e 31 35 36 42 47 45 2d 45 41 31 0a 20 00 6a   .N156BGE-EA1. .j
   DDC communication failed
   This is an eDP laptop display. Laptop displays do not support DDC/CI.

ddcutil_0.9.9-interrogate.txt

ddcutil 2.1.3

/usr/local/bin# ./ddcutil detect --verbose
Invalid display
   I2C bus:  /dev/i2c-5
      DRM connector:                         card0-HDMI-A-1
      /sys/class/drm/card0-HDMI-A-1/dpms     On
      /sys/class/drm/card0-HDMI-A-1/enabled  enabled
      /sys/class/drm/card0-HDMI-A-1/status   connected
      Driver:                                i915
      I2C address 0x50 (EDID) responsive:    true 
      I2C address 0x37 (DDC)  responsive:    true 
      Is LVDS or EDP display:                false
      Is laptop display by EDID:             false
      Is laptop display:                     false
      /sys/bus/i2c/devices/i2c-5/name        i915 gmbus dpb
      PCI device path:                       /sys/devices/pci0000:00/0000:00:02.0/i2c-5
   EDID synopsis:
      Mfg id:               AOC - UNK
      Model:                2475W1
      Product code:         9333  (0x2475)
      Serial number:        P08H4QA007082
      Binary serial number: 16843009 (0x01010101)
      Manufacture year:     2017,  Week: 16
      EDID version:         1.3
      Extra descriptor:        
      Video input definition:    0x80 - Digital Input
      Supported features:
         DPMS active-off
         Digital display type: RGB 4:4:4 + YCrCb 4:4:4
         Standard sRGB color space: False
      White x,y:        0.313, 0.329
      Red   x,y:        0.639, 0.338
      Green x,y:        0.297, 0.616
      Blue  x,y:        0.151, 0.053
      Extension blocks: 1
   EDID source: I2C
   EDID hex dump:
              +0          +4          +8          +c            0   4   8   c   
      +0000   00 ff ff ff ff ff ff 00 05 e3 75 24 01 01 01 01   ..........u$....
      +0010   10 1b 01 03 80 35 1e 78 2a a3 e5 a3 56 4c 9d 26   .....5.x*...VL.&
      +0020   0d 50 54 bf ef 00 d1 c0 b3 00 95 00 81 80 81 40   .PT............@
      +0030   81 c0 01 01 01 01 02 3a 80 18 71 38 2d 40 58 2c   .......:..q8-@X,
      +0040   45 00 0f 28 21 00 00 1e 00 00 00 ff 00 50 30 38   E..(!........P08
      +0050   48 34 51 41 30 30 37 30 38 32 00 00 00 fd 00 32   H4QA007082.....2
      +0060   4c 0f 53 11 00 0a 20 20 20 20 20 20 00 00 00 fc   L.S...      ....
      +0070   00 32 34 37 35 57 31 0a 20 20 20 20 20 20 01 16   .2475W1.      ..
   DDC communication failed. (getvcp of feature x10 returned Error_Info[DDCRC_RETRIES in ddc_write_read_with_retry, causes: DDCRC_READ_ALL_ZERO(10)])

Invalid display
   I2C bus:  /dev/i2c-7
      DRM connector:                         card0-eDP-1
      /sys/class/drm/card0-eDP-1/dpms        On
      /sys/class/drm/card0-eDP-1/enabled     enabled
      /sys/class/drm/card0-eDP-1/status      connected
      Driver:                                i915
      I2C address 0x50 (EDID) responsive:    true 
      I2C address 0x37 (DDC)  responsive:    false
      Is LVDS or EDP display:                true 
      Is laptop display by EDID:             false
      Is laptop display:                     true 
      /sys/bus/i2c/devices/i2c-7/name        AUX A/port A
      PCI device path:                       /sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-eDP-1/i2c-7
   EDID synopsis:
      Mfg id:               CMN - Chimei Innolux Corporation
      Model:                
      Product code:         5565  (0x15bd)
      Serial number:        
      Binary serial number: 0 (0x00000000)
      Manufacture year:     2012,  Week: 17
      EDID version:         1.4
      Extra descriptor:        N156BGE-EA1
      Video input definition:    0x95 - Digital Input (DisplayPort), Bit depth: 6
      Supported features:
         Digital display type: RGB 4:4:4
         Standard sRGB color space: False
      White x,y:        0.313, 0.329
      Red   x,y:        0.585, 0.354
      Green x,y:        0.338, 0.575
      Blue  x,y:        0.152, 0.118
      Extension blocks: 0
   EDID source: I2C
   EDID hex dump:
              +0          +4          +8          +c            0   4   8   c   
      +0000   00 ff ff ff ff ff ff 00 0d ae bd 15 00 00 00 00   ................
      +0010   11 16 01 04 95 22 13 78 02 e9 15 95 5a 56 93 27   .....".x....ZV.'
      +0020   1e 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01   .PT.............
      +0030   01 01 01 01 01 01 79 1d 56 c2 50 00 26 30 1f 41   ......y.V.P.&0.A
      +0040   4c 00 58 c2 10 00 00 18 00 00 00 fe 00 4e 31 35   L.X..........N15
      +0050   36 42 47 45 2d 45 41 31 0a 20 00 00 00 fe 00 43   6BGE-EA1. .....C
      +0060   4d 4e 0a 20 20 20 20 20 20 20 20 20 00 00 00 fe   MN.         ....
      +0070   00 4e 31 35 36 42 47 45 2d 45 41 31 0a 20 00 6a   .N156BGE-EA1. .j
   This is a laptop display.  Laptop displays do not support DDC/CI

ddcutil_2.1.3-interrogate.txt

Can anything be done to make this function work?
@rockowitz
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rockowitz commented Feb 16, 2024 •
edited

The monitor is returning reply packets that are entirely zero, or more precisely the video adapter is reading zeros from the I2C bus after it puts a request packet on the bus.

First, option --ddc will report DDC data errors..

I'm not optimistic, but some things to try.

  • Turn off dynamic sleep adjustment and force a high sleep multiplier using options: --disable-dynamic-sleep --sleep-multiplier 3
  • Kernel module i2c_dev actually has 2 interfaces, one using ioctl() and one using file write()/read(). Normally ddcutil uses the ioctl() interface. To use the file io interface, specify option --use-file-io.
  • If I'm reading the laptop and monitor specs correctly, in addition to HDMI they both have VGA connectors. I'm sure you don't want to normally use a VGA connection, but it would be informative if the problem persists when using that connection.

@rockowitz rockowitz added the monitor specific problems with particular monitors label Feb 16, 2024
@setaur
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setaur commented Feb 16, 2024 •
edited

Thanks for the answer.
Yes, both laptop and monitor have VGA, but unfortunately I don't have cable at this time. I will try, when I get one.
It looks like all those commands failed to produce anything useful:

/usr/local/bin# ./ddcutil --ddc detect
DDC: All zero response detected in ddc_i2c_write_read_raw
DDC: All zero response detected in ddc_i2c_write_read_raw
DDC: All zero response detected in ddc_i2c_write_read_raw
DDC: All zero response detected in ddc_i2c_write_read_raw
DDC: All zero response detected in ddc_i2c_write_read_raw
DDC: All zero response detected in ddc_i2c_write_read_raw
DDC: All zero response detected in ddc_i2c_write_read_raw
DDC: All zero response detected in ddc_i2c_write_read_raw
DDC: All zero response detected in ddc_i2c_write_read_raw
DDC: All zero response detected in ddc_i2c_write_read_raw
Invalid display
   I2C bus:  /dev/i2c-5
   DRM connector:           card0-HDMI-A-1
   EDID synopsis:
      Mfg id:               AOC - UNK
      Model:                2475W1
      Product code:         9333  (0x2475)
      Serial number:        P08H4QA007082
      Binary serial number: 16843009 (0x01010101)
      Manufacture year:     2017,  Week: 16
   DDC communication failed. (getvcp of feature x10 returned Error_Info[DDCRC_RETRIES in ddc_write_read_with_retry, causes: DDCRC_READ_ALL_ZERO(10)])

Invalid display
   I2C bus:  /dev/i2c-7
   DRM connector:           card0-eDP-1
   EDID synopsis:
      Mfg id:               CMN - Chimei Innolux Corporation
      Model:                
      Product code:         5565  (0x15bd)
      Serial number:        
      Binary serial number: 0 (0x00000000)
      Manufacture year:     2012,  Week: 17
   This is a laptop display.  Laptop displays do not support DDC/CI

/usr/local/bin# ./ddcutil --disable-dynamic-sleep --sleep-multiplier 3 detect
Invalid display
   I2C bus:  /dev/i2c-5
   DRM connector:           card0-HDMI-A-1
   EDID synopsis:
      Mfg id:               AOC - UNK
      Model:                2475W1
      Product code:         9333  (0x2475)
      Serial number:        P08H4QA007082
      Binary serial number: 16843009 (0x01010101)
      Manufacture year:     2017,  Week: 16
   DDC communication failed. (getvcp of feature x10 returned Error_Info[DDCRC_RETRIES in ddc_write_read_with_retry, causes: DDCRC_READ_ALL_ZERO(10)])

Invalid display
   I2C bus:  /dev/i2c-7
   DRM connector:           card0-eDP-1
   EDID synopsis:
      Mfg id:               CMN - Chimei Innolux Corporation
      Model:                
      Product code:         5565  (0x15bd)
      Serial number:        
      Binary serial number: 0 (0x00000000)
      Manufacture year:     2012,  Week: 17
   This is a laptop display.  Laptop displays do not support DDC/CI

/usr/local/bin# ./ddcutil --use-file-io detect
Invalid display
   I2C bus:  /dev/i2c-5
   DRM connector:           card0-HDMI-A-1
   EDID synopsis:
      Mfg id:               AOC - UNK
      Model:                2475W1
      Product code:         9333  (0x2475)
      Serial number:        P08H4QA007082
      Binary serial number: 16843009 (0x01010101)
      Manufacture year:     2017,  Week: 16
   DDC communication failed. (getvcp of feature x10 returned Error_Info[DDCRC_RETRIES in ddc_write_read_with_retry, causes: DDCRC_READ_ALL_ZERO(10)])

Invalid display
   I2C bus:  /dev/i2c-7
   DRM connector:           card0-eDP-1
   EDID synopsis:
      Mfg id:               CMN - Chimei Innolux Corporation
      Model:                
      Product code:         5565  (0x15bd)
      Serial number:        
      Binary serial number: 0 (0x00000000)
      Manufacture year:     2012,  Week: 17
   This is a laptop display.  Laptop displays do not support DDC/CI

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@setaur @rockowitz