Black screen external monitor using HP Ultraslim dock station (with DP)

[lbenech]

And here is the proof that when connected directly to the laptop, the external screen is well recognized as "Display Port".

 

[lbenech]

No "Problem Reporting" files attached.
Read FAQ, "Problem Reporting" again. Carefully. Attach all requested files/output.

Don't understand. I didn't change anything so the reporting files remain the same. I just go a step forward on my investigation.

 

[RehabMan]

Don't understand. I didn't change anything so the reporting files remain the same. I just go a step forward on my investigation.

Your old ioreg shows connector-type <00 04 00 00> (which is DP).
But we have already established you may be providing/looking at old ioreg data (post #17 and #18).

Note that the data you're looking at now (in System Information) may be related to the EDID, not the framebuffer connector.

 

[lbenech]

So here are the new reporting files (seems to be the same ones).
Same result: connector-type in ioreg is "00 04 00 00" (DP) whereas the OSX system report shows DVI or HDMI !!!
When the monitor is connected directly to the laptop (without the dock station) it is well recognized as Display port in the system report...

 

[RehabMan]

So here are the new reporting files (seems to be the same ones).
Same result: connector-type in ioreg is "00 04 00 00" (DP) whereas the OSX system report shows DVI or HDMI !!!
When the monitor is connected directly to the laptop (without the dock station) it is well recognized as Display port in the system report...

Your ioreg shows monitors connected @1 and @2. Which is which? Where is the System Information data for the @2?
Attach ioreg with monitor connected directly to the laptop.

 

[lbenech]

@1 is the DP monitor
@2 is the VGA one (which works)

Please find attached the System Information capture for @2 and the ioreg with the DP monitor directly connected to the laptop.

 

[RehabMan]

@1 is the DP monitor
@2 is the VGA one (which works)

Please find attached the System Information capture for @2 and the ioreg with the DP monitor directly connected to the laptop.

Note that the EDID is different between the monitor that was plugged in vs. the new one (red/crossed-out AppleDisplay under @1 vs. black non-crossed AppleDisplay)...

red/crossed-out:

NUC6i7KYK:~ rehabman$ echo -n 00 ff ff ff ff ff ff 00 22 f0 63 30 01 01 01 01 04 19 01 04 a5 33 1d 78 2a dd 45 a3 55 4f a0 27 12 50 54 a1 08 00 81 c0 81 80 95 00 a9 c0 b3 00 d1 c0 01 01 01 01 02 3a 80 18 71 38 2d 40 58 2c 45 00 fd 1e 11 00 00 1e 00 00 00 fd 00 32 4c 18 5e 14 00 0a 20 20 20 20 20 20 00 00 00 fc 00 48 50 20 45 32 33 31 0a 20 20 20 20 20 00 00 00 ff 00 33 43 51 35 30 34 33 33 30 42 0a 20 20 00 07|xxd -r -p|~/Projects/edid-decode/edid-decode
Extracted contents:
header:          00 ff ff ff ff ff ff 00
serial number:   22 f0 63 30 01 01 01 01 04 19
version:         01 04
basic params:    a5 33 1d 78 2a
chroma info:     dd 45 a3 55 4f a0 27 12 50 54
established:     a1 08 00
standard:        81 c0 81 80 95 00 a9 c0 b3 00 d1 c0 01 01 01 01
descriptor 1:    02 3a 80 18 71 38 2d 40 58 2c 45 00 fd 1e 11 00 00 1e
descriptor 2:    00 00 00 fd 00 32 4c 18 5e 14 00 0a 20 20 20 20 20 20
descriptor 3:    00 00 00 fc 00 48 50 20 45 32 33 31 0a 20 20 20 20 20
descriptor 4:    00 00 00 ff 00 33 43 51 35 30 34 33 33 30 42 0a 20 20
extensions:      00
checksum:        07

Manufacturer: HWP Model 3063 Serial Number 16843009
Made week 4 of 2015
EDID version: 1.4
Digital display
8 bits per primary color channel
DisplayPort interface
Maximum image size: 51 cm x 29 cm
Gamma: 2.20
DPMS levels: Off
Supported color formats: RGB 4:4:4, YCrCb 4:4:4
First detailed timing is preferred timing
Established timings supported:
  720x400@70Hz
  640x480@60Hz
  800x600@60Hz
  1024x768@60Hz
Standard timings supported:
  1280x720@60Hz
  1280x1024@60Hz
  1440x900@60Hz
  1600x900@60Hz
  1680x1050@60Hz
  1920x1080@60Hz
Detailed mode: Clock 148.500 MHz, 509 mm x 286 mm
               1920 2008 2052 2200 hborder 0
               1080 1084 1089 1125 vborder 0
               +hsync +vsync
Monitor ranges (GTF): 50-76Hz V, 24-94kHz H, max dotclock 200MHz
Monitor name: HP
Serial number: 3CQ504330B
Checksum: 0x7 (valid)
EDID block does NOT conform to EDID 1.3!
    Detailed block string not properly terminated

black/non-crossed AppleDisplay:

NUC6i7KYK:~ rehabman$ echo -n 00 ff ff ff ff ff ff 00 22 f0 63 30 01 01 01 01 04 19 01 04 a5 33 1d 78 26 dd 45 a3 55 4f a0 27 12 50 54 a1 08 00 81 c0 81 80 95 00 a9 c0 b3 00 d1 c0 01 01 01 01 02 3a 80 18 71 38 2d 40 58 2c 45 00 fd 1e 11 00 00 1e 00 00 00 fd 00 32 4c 18 5e 14 00 0a 20 20 20 20 20 20 00 00 00 fc 00 48 50 20 45 32 33 31 0a 20 20 20 20 20 00 00 00 ff 00 33 43 51 35 30 34 33 33 30 42 0a 20 20 00 0b|xxd -r -p|~/Projects/edid-decode/edid-decode
Extracted contents:
header:          00 ff ff ff ff ff ff 00
serial number:   22 f0 63 30 01 01 01 01 04 19
version:         01 04
basic params:    a5 33 1d 78 26
chroma info:     dd 45 a3 55 4f a0 27 12 50 54
established:     a1 08 00
standard:        81 c0 81 80 95 00 a9 c0 b3 00 d1 c0 01 01 01 01
descriptor 1:    02 3a 80 18 71 38 2d 40 58 2c 45 00 fd 1e 11 00 00 1e
descriptor 2:    00 00 00 fd 00 32 4c 18 5e 14 00 0a 20 20 20 20 20 20
descriptor 3:    00 00 00 fc 00 48 50 20 45 32 33 31 0a 20 20 20 20 20
descriptor 4:    00 00 00 ff 00 33 43 51 35 30 34 33 33 30 42 0a 20 20
extensions:      00
checksum:        0b

Manufacturer: HWP Model 3063 Serial Number 16843009
Made week 4 of 2015
EDID version: 1.4
Digital display
8 bits per primary color channel
DisplayPort interface
Maximum image size: 51 cm x 29 cm
Gamma: 2.20
DPMS levels: Off
Supported color formats: RGB 4:4:4
Default (sRGB) color space is primary color space
First detailed timing is preferred timing
Established timings supported:
  720x400@70Hz
  640x480@60Hz
  800x600@60Hz
  1024x768@60Hz
Standard timings supported:
  1280x720@60Hz
  1280x1024@60Hz
  1440x900@60Hz
  1600x900@60Hz
  1680x1050@60Hz
  1920x1080@60Hz
Detailed mode: Clock 148.500 MHz, 509 mm x 286 mm
               1920 2008 2052 2200 hborder 0
               1080 1084 1089 1125 vborder 0
               +hsync +vsync
Monitor ranges (GTF): 50-76Hz V, 24-94kHz H, max dotclock 200MHz
Monitor name: HP
Serial number: 3CQ504330B
Checksum: 0xb (valid)
EDID block does NOT conform to EDID 1.3!
    Detailed block string not properly terminated

Here is a diff:

NUC6i7KYK:~ rehabman$ diff 1 2
1c1
< NUC6i7KYK:~ rehabman$ echo -n 00 ff ff ff ff ff ff 00 22 f0 63 30 01 01 01 01 04 19 01 04 a5 33 1d 78 2a dd 45 a3 55 4f a0 27 12 50 54 a1 08 00 81 c0 81 80 95 00 a9 c0 b3 00 d1 c0 01 01 01 01 02 3a 80 18 71 38 2d 40 58 2c 45 00 fd 1e 11 00 00 1e 00 00 00 fd 00 32 4c 18 5e 14 00 0a 20 20 20 20 20 20 00 00 00 fc 00 48 50 20 45 32 33 31 0a 20 20 20 20 20 00 00 00 ff 00 33 43 51 35 30 34 33 33 30 42 0a 20 20 00 07|xxd -r -p|~/Projects/edid-decode/edid-decode
---
> NUC6i7KYK:~ rehabman$ echo -n 00 ff ff ff ff ff ff 00 22 f0 63 30 01 01 01 01 04 19 01 04 a5 33 1d 78 26 dd 45 a3 55 4f a0 27 12 50 54 a1 08 00 81 c0 81 80 95 00 a9 c0 b3 00 d1 c0 01 01 01 01 02 3a 80 18 71 38 2d 40 58 2c 45 00 fd 1e 11 00 00 1e 00 00 00 fd 00 32 4c 18 5e 14 00 0a 20 20 20 20 20 20 00 00 00 fc 00 48 50 20 45 32 33 31 0a 20 20 20 20 20 00 00 00 ff 00 33 43 51 35 30 34 33 33 30 42 0a 20 20 00 0b|xxd -r -p|~/Projects/edid-decode/edid-decode
6c6
< basic params:    a5 33 1d 78 2a
---
> basic params:    a5 33 1d 78 26
15c15
< checksum:        07
---
> checksum:        0b
26c26,27
< Supported color formats: RGB 4:4:4, YCrCb 4:4:4
---
> Supported color formats: RGB 4:4:4
> Default (sRGB) color space is primary color space
47c48
< Checksum: 0x7 (valid)
---
> Checksum: 0xb (valid)

 

[lbenech]

Ok so back to my previous issue: EDID data are not overrided whereas the displayName is. Don't know why my override file is not well taken into account.

 

[RehabMan]

Ok so back to my previous issue: EDID data are not overrided whereas the displayName is. Don't know why my override file is not well taken into account.

If the display name is changing in SysPrefs->Displays (and System Information), then the override file is working.

 

[lbenech]

Indeed I confirm that the display name is the one that I defined in the override file, that's why I don't understand what's going on! It looks like another process is reseting the EDID value... I will continue to investigate.