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I just wanted to let the group know that I have made good progress. I started from scratch with a clean buster image and using my Pi3B (to rule out any issues specific to my PI4). With just the out of the box image I added in the lines
to config.txt and rebooted.
With just those lines the the DRAWS sound card was not detected. I then added in the line dtdebug=1 at the start of config.txt, rebooted and looked at the debug output. I saw that it was trying to load the device tree for HAT but it failed with the error
dterror: can't find symbol 'cprman'
and then it unloaded HAT
I then added in the line
to the start of my config.txt and rebooted. This time the sound card was detected. I then tried the sd card in my Pi4 and the DRAWS sound card was detected ok.
I still have to set up the rest of the software but I am now heading in the right direction.
It looks like the automatic loading of the drive tree based on the data in the DRAWS eeprom was failing and that had a knock on effect that stopped the line dtovwerlay=draws,alsaname=udrc from working.
I also had a look at the config.txt on the image I am actively using with DRAWS for wsjtx and I notice that it also has the line
73 de Jonathan GI7KMC
On Fri, 30 Aug 2019 at 04:47, John D Hays - K7VE <john@...> wrote: