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bulletmark / edid-rw

A utility to read and write a display EDID value.
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Unable to write EDID info to EDID emulator #15

Closed DGdB closed 1 year ago

DGdB commented 3 years ago

Hi Guys,

I have been using this tool to write EDID information to some cheap inline EDID emulators from china. What an amazing tool! I am even using EDID editors to customise the edid.bin and writing it. Works a treat!

Issue is I have received a batch of EDID emulators that have no HDMI audio... This is bad for me as I now have 200 of them and they are almost useless... I tried to re-write the EDID to allow audio (which has worked on other models) and sure enough, it won't write. Anyone got any ideas? It's as if the PC can't see it, except it can?

When I try extract/view EDID info: sudo ./edid-rw 3 | edid-decode Traceback (most recent call last): File "./edid-rw", line 137, in <module> main() File "./edid-rw", line 125, in main edid = [dev.read(i) for i in range(EDID_HDR)] File "./edid-rw", line 125, in <listcomp> edid = [dev.read(i) for i in range(EDID_HDR)] File "./edid-rw", line 51, in read return self.smb.read_byte_data(EDID_ADDR, n) OSError: [Errno 6] No such device or address EDID extract of 'stdin' failed

When I try to write EDID info: sudo ./edid-rw -w 3 <modi-edid.bin Traceback (most recent call last): File "./edid-rw", line 137, in <module> main() File "./edid-rw", line 121, in main dev.write(i, val) File "./edid-rw", line 55, in write self.smb.write_byte_data(EDID_ADDR, n, val) OSError: [Errno 6] No such device or address

When I try grab EDID info using read-edid: `sudo get-edid | parse-edid This is read-edid version 3.0.2. Prepare for some fun. Attempting to use i2c interface No EDID on bus 0 No EDID on bus 1

No EDID on bus 2 No EDID on bus 4 No EDID on bus 5 No EDID on bus 6 1 potential busses found: 3 256-byte EDID successfully retrieved from i2c bus 3 Looks like i2c was successful. Have a good day. You seem to have too many extension blocks. Will not continue to parse Something strange happened. Please contact the author, Matthew Kern at pyrophobicman@gmail.com`

Any help is appreciated! I know this tool was unsupported just shy of a month ago so if no help is available that's OK too... This same EDID emulator has worked before with your tool, but I suspect the EDID flashed to these by the manufacturer is corrupt or something else weird? Any idea how to force write EDID or reset the EDID or something?

I have already tried the variant of the tool spoken of here: #3

mssuleiman commented 3 years ago

hi did you had any luck , I am facing the same problem tried all the possible ways but with no luck .

DGdB commented 3 years ago

hi did you had any luck , I am facing the same problem tried all the possible ways but with no luck .

I didn't. Some devices are just EDID locked and you can't really do much about it. We use enough of these things that I ordered a bunch and got the manufacturer to write a custom EDID for me... Best of luck!