In Device Manager under "Audio Inputs & outputs" I see "TinyPilot (Intel(R) Display Audio)"

Hi Track, thanks for reaching out with your question about what you're seeing in the Device Manager. I've checked and the identifier before "Display Audio" is taken from the EDID as you've correctly identified. The only way to change this value is to replace the EDID with a manually modified version.

I note that you said you've already edited the EDID. Our old EDID would have registered as a generic monitor whereas our new new EDID does contain "TinyPilot" as the "Product Name". We haven't rolled this out to TinyPilot Pro customers just yet, but it's possible that changes you made previously could have been overwritten if you've updated your EDID at some point.

Is this the same EDID: /home/ustreamer/edids/tc358743-edid.hex ?

I had updated it with this command on one of your other posts: Of course I changed "TinyPilot" with some other equivalent text. Here is what I used.

readonly EDID="/home/ustreamer/edids/tc358743-edid.hex"
echo -ne "" | sudo tee "${EDID}" && \
  echo '00ffffffffffff0052628888008888882d1e0103' | sudo tee -a "${EDID}" && \
  echo '800000781aee91a3544c99260f50547fef8081c0' | sudo tee -a "${EDID}" && \
  echo '8140810081809500a9c081406140271f80f07138' | sudo tee -a "${EDID}" && \
  echo '164038c0350040442100001eec2c80a070381a40' | sudo tee -a "${EDID}" && \
  echo '3020350040442100001e000000fc004153555320' | sudo tee -a "${EDID}" && \
  echo '4d5131360a202020000000fd003b3d0f2e100000' | sudo tee -a "${EDID}" && \
  echo '000000000000014702031c734c010204139f2021' | sudo tee -a "${EDID}" && \
  echo '223c3d3e3c2066030c00300080e2007f00000000' | sudo tee -a "${EDID}" && \
  echo '0000000000000000000000000000000000000000' | sudo tee -a "${EDID}" && \
  echo '0000000000000000000000000000000000000000' | sudo tee -a "${EDID}" && \
  echo '0000000000000000000000000000000000000000' | sudo tee -a "${EDID}" && \
  echo '0000000000000000000000000000000000000000' | sudo tee -a "${EDID}" && \
  echo '0000000000000000000000000000006b' | sudo tee -a "${EDID}" && \
  sudo v4l2-ctl --device=/dev/video0 --set-edid=file="${EDID}" --fix-edid-checksums

You can indeed find the current EDID under /home/ustreamer/edids/tc358743-edid.hex. It looks like the example in your message is our old EDID, so it's possible it's been overwritten since then.

Can you please check that the file above contains your modified EDID by running the following command in your SSH session?

cat /home/ustreamer/edids/tc358743-edid.hex

Assuming the file does contain your modified EDID, can you please try re-running the final command as shown below and checking if any error messages are displayed?

sudo v4l2-ctl --device=/dev/video0 --set-edid=file=/home/ustreamer/edids/tc358743-edid.hex --fix-edid-checksums

Yes, the EDID under /home/ustreamer/edids/tc358743-edid.hex does contain my text (ASUS).

Here are the results of running that second command:

CTA-861 Header
  IT Formats Underscanned: yes
  Audio:                   yes
  YCbCr 4:4:4:             yes
  YCbCr 4:2:2:             yes

HDMI Vendor-Specific Data Block
  Physical Address:        3.0.0.0
  YCbCr 4:4:4 Deep Color:  no
  30-bit:                  no
  36-bit:                  no
  48-bit:                  no

CTA-861 Video Capability Descriptor
  RGB Quantization Range:  yes
  YCC Quantization Range:  no
  PT:                      Supports both over- and underscan
  IT:                      Supports both over- and underscan
  CE:                      Supports both over- and underscan

Could there be a different EDID for the Audio connection part of this?

Thanks for checking that, there is only a single EDID and it looks like it is being applied correctly. One possibility is that the target computer has cached the “TinyPilot” identifier at some point. Does it revert to a different name if you disconnect your TinyPilot device or connect a different monitor temporarily?

Hi, does this appear for Voyager 2, not 2a devices? I don’t want to clean-install update if so

Thank you for the clarity. OK so this is with 2.5.4 … I was thinking 2.5.3 was the new OS

2 things:

• those articles maybe should have a hyperlink together. (EDID hyperlink just goes to Wikipedia)
• regarding not wanting to document changing EDIDs, might I ask if it would just be possible to state how revert to 2.5.3 / below EDIDs and not apply the 2.5.4 ? <edit … nvm I see you mentioned this from the OPs comment … thanks! >

While, as always mentioned, there’s no guarantees with obfuscation and this is just “best attempt” , upgrading to 2.5.4 and later would be infeasible if changing the strings in the main article doesn’t help with it showing as a audio device in Device Manager.

Are there issues or something with reverting back to the old EDIDs (Toshiba) given the new OS, and thus it must have new EDIDs that identify as TinyPilot?

One final question. So changing the EDIDs is something under uStreamer itself… does this or could it impact functionality if it was decided to change those hex strings arbitrarily to anything else, assuming making them the same length?