Hello Support, is there anyone monitoring this website, or the e-mail address?

I’ve not heard anything back to my e-mails.

I think they have a guy that checks the mail once per week 🙂

To be clear, your issue is like that which is pictured at
https://insights.club-3d.com/thread/flickering-problem-with-cac-1510-a-and-apple-cinema-display-30-on-mac-mini-m1/

?

I don’t think that’s an issue that can be corrected with firmware.

Club-3d has not acknowledged the issue because they have no way to fix it.

Oh, ok. I thought fuzzy meant everything was basically usable except for some fuzziness.

I think the snow described in that thread is more like random noise like a TV tuned between channels where nothing is visible. And the snow is coloured – not just black and white – which means all the RGB values are randomized? Like this? https://i.sstatic.net/fpBgo.gif

Can you see this?

Is the snow only in some open windows or all open windows? Which windows? Is It only inside windows that are supposed to contain videos from streaming apps like netflix?

The snow is translucent so you can sort of see the desktop and windows through the snow?

That’s a complicated effect. I would like to see a photo of that. I suppose the OS has a HDCP requirement that the adapter doesn’t meet so the OS obscures everything with that static/snow.

What display do you have? Did you check the EDID to see if it supports HDCP?

CRU is a utility that can extract EDID. It is mentioned in https://insights.club-3d.com/thread/cac-1088-support-for-2560×2880-resolution/

Maybe you can post the hex of the EDID here and I can use edid-decode to parse the result.

Since the display is DVI, you might try a passive HDMI to DVI adapter or cable to connect the display if your PC has a HDMI output. Get the EDID for that connection type as well so they can be compared.

Do you remember if you got the HDCP-ON or HDCP-OFF version of the CAC-1010? Maybe try e-mail [email protected] again and specify that you want the latest firmware for both versions.

Sorry. I forgot we were dealing with dual link DVI. Yes, a dual link DVI adapter is required for 1440p60.

However, single link DVI should be sufficient to ensure an EDID that is not modified by the adapter.

Use the Export button to export the EDIDs from CRU for each connection type.

Post it somewhere and I can decode it using edid-decode from v4l-utils (it’s a Linux open source project which I can compile for macOS).

Or you can convert it to hex and copy the hex bytes to here. the first 8 bytes should be
00FFFFFFFFFFFF00
then I can decode that.

That EDID doesn’t have HDCP info. The extension block is invalid. Is the EDID the same if you use a HDMI connection instead?

Although this forum does have the [ code ] / [ /code ] commands, it doesn’t seem to be able to preserve indenting when pasting text:

edid-decode (hex):
00 ff ff ff ff ff ff 00 23 2f 9b 04 00 00 00 00
28 15 01 04 a5 3c 22 78 2a 6f b1 a7 55 4c 9e 25
0c 50 54 00 00 00 01 01 01 01 01 01 01 01 01 01
01 01 01 01 01 01 56 5e 00 a0 a0 a0 29 50 30 20
35 00 55 50 21 00 00 1a 00 00 00 fc 00 44 55 41
4c 2d 44 56 49 0a 20 20 20 20 00 00 00 fc 00 0a
20 20 20 20 20 20 20 20 20 20 20 20 00 00 00 fc
00 0a 20 20 20 20 20 20 20 20 20 20 20 20 01 08
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff 7f
----------------
Block 0, Base EDID:
  EDID Structure Version & Revision: 1.4
  Vendor & Product Identification:
    Manufacturer: HYO
    Model: 1179
    Made in: week 40 of 2011
Basic Display Parameters & Features:
Digital display
Bits per primary color channel: 8
DisplayPort interface
Maximum image size: 60 cm x 34 cm
Gamma: 2.20
DPMS levels: Off
Supported color formats: RGB 4:4:4, YCrCb 4:4:4
First detailed timing includes the native pixel format and preferred refresh rate
Color Characteristics:
Red : 0.6533, 0.3339
Green: 0.2998, 0.6201
Blue : 0.1464, 0.0498
White: 0.3125, 0.3291
Established Timings I & II: none
Standard Timings: none
Detailed Timing Descriptors:
DTD 1: 2560x1440 59.950550 Hz 16:9 88.787 kHz 241.500000 MHz (597 mm x 336 mm)
Hfront 48 Hsync 32 Hback 80 Hpol P
Vfront 3 Vsync 5 Vback 33 Vpol N
Display Product Name: 'DUAL-DVI'
FAIL: Empty string.
Display Product Name: ''
FAIL: Empty string.
Display Product Name: ''
Extension blocks: 1
Checksum: 0x08
----------------
Block 1, Manufacturer-Specific Extension Block:
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff '................'
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff '................'
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff '................'
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff '................'
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff '................'
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff '................'
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff '................'
ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff 7f '................'
FAIL: Unknown Extension Block.
Checksum: 0x7f
----------------
Failures:
Block 0, Base EDID:
Display Product Name: Empty string.
Display Product Name: Empty string.
Block 1, Manufacturer-Specific Extension Block:
Unknown Extension Block.
EDID conformity: FAIL

Good news, support found my emails in their spam folder and were able to provide the firmware.

Applying the HDCP OFF firmware seems to have fixed the issue.

How does HDCP OFF change the behavior?

I guess fuzzy happens when the display is assumed to be HDCP but doesn’t handle HDCP?

If it’s HDCP OFF, then it means Netflix won’t play videos on that display, but at least it won’t do fuzzy?

Shouldn’t there be a downside somewhere to using HDCP OFF? Or does HDCP OFF add HDCP support to a non-HDCP display?

I have this exact issue. Could you upload the firmware file?