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   REPLY:  f56a0e95   
   PID: SoupGate-Win32 v1.05   
   On 1/5/2024 11:11, Theo wrote:   
   > Bryan  wrote:   
   >>   
   >> Ok, I do see the lite version SHOULD boot from uSD, so perhaps this is a   
   >> problem with the actual OS version as well. There's also this little bit   
   >> of info with some changes to config.txt:   
   >>   
   >> https://www.waveshare.com/wiki/Wrote_Image_for_Compute_Module   
   Boards_Lite_version   
   >>   
   >> which I'll try.   
   >   
   > This in config.txt:   
   > dtoverlay=dwc2,dr_mode=host   
   >   
   > (there should not be a dot on the end)   
   >   
   > overrides the USB 2 port into host mode, ie to accept USB sticks etc.  I   
   > suppose that could be a reason why your CM4 won't USB boot.  Ordinarily the   
   > port can detect whether to be in host or device more via the 5th pin on the   
   > micro USB connector, which is tied low in an OTG adapter to force host mode.   
   > Maybe your board doesn't do this correctly?  Of course, if you can't boot   
   > you can't read config.txt to force the port to the right direction, so   
   > you'd have to rely on the pin being tied low.   
   >   
   > Even without this, and even with no SD, I'd expect to see some sign of life   
   > on the HDMI: the Pi4 should display a 'BIOS' style boot screen that says   
   > what it's trying to boot from.   
   >   
   >> I don't have a lot of information on the carrier itself, that seems to   
   >> be somewhat lacking. Maybe the carrier is bad, being a Super High   
   >> Quality Much Goodly Chinese device, who knows? There are reviews of it   
   >> out there, but no real hard information. I'll dig into that as well.   
   >>   
   >> The local Micro Center has a cheap carrier in stock of a different   
   >> style, so I'm going to pick up one of those this weekend and give that a   
   >> try as well, but I'll grab an older OS first to see how that goes.   
   >   
   > Good plan.  Once you can get anything working, you can then take deltas   
   > against the setup you have to narrow down the problem.  If absolutely   
   > nothing works then there are few clues.   
   >   
   > Theo   
   >   
      
   Some success here. I'm using the Bullseye version presented on the RPi   
   OS page, instead of whatever the latest is.   
      
   I set the other carrier board up, it's marked as being made by   
   "bigtreetech" and looks like a regular Pi once assembled. Trying the SD   
   card in it's slot, I see the same things as with the other board,   
   according to my router it's been offered an address - this happens over   
   and over. No boot happens.   
      
   I took the SD card and put it in a USB reader, put it in a USB port on   
   this carrier, and it booted. That would seem to indicate that the   
   MCUZone carrier that I hoped to use is incapable of booting from USB - I   
   assume the rainbow splash screen is a kernel panic at this point.   
      
   (I can't see anything visual on the bigtreetech carrier, it has   
   micro-HDMI and I can't find my adapters.)   
      
      
   Going back to the MCUZone carrier, I put the known good card in the SD   
   slot. Here's what I see:   
      
   https://pic8.co/a/d697dd4c-18c1-42c7-90e9-2fcf8d7d931c/   
      
   The device eventually gets an address like it's waiting for something   
   else, and does this over and over, never booting. I should mention this   
   carrier has a run/boot jumper, this is in the boot position. Putting it   
   in the run position (I assume, it's not clear) gives me a black screen   
   and nothing else. Putting the card in the known good reader gives me the   
   same rainbow screen.   
      
   One thing I notice is the boot order, which has a "1" for SD card at the   
   end of the list. However, I also see "SD card not detected" - is it   
   possible that the boot order needs to be changed so it's looking for the   
   SD card first? Doing this is something I'd have to research before   
   attempting.   
      
   In any event, the MCUZone device won't boot from USB, and none of them   
   boot from SD at this point.   
      
   --- SoupGate-Win32 v1.05   
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