suddenly "Lock"

[wjcarpenter]

Discussed in https://github.com/opencardev/crankshaft/discussions/678

^{Originally posted by wjcarpenter September 1, 2024} I started tinkering with CS about a month or so back. I fired it up and used my mouse to operate it while displaying over HDMI. Everything looked pretty cool and stable. I got a nice touchscreen, bolted my RPi 3B+ to it and repeated the experiment. It worked great, and the touchscreen stuff worked just dandy. I plugged in my phone (Pixel 6a) and up came AA. It behaved the way I expected.

Time went by while I was waiting for additional mail order parts, 3D printing a case, and doing unrelated things. With everything in hand a couple days ago, I repeated my experiments, including plugging in my phone for the first time in a few weeks. CS reacted by throwing up the word "Lock" in the upper left corner and ignoring touches or mouse clicks on the screen. When I unplug my phone, CS goes back to its normal responsive self.

Thinking I might have tweaked something the wrong way, I started over with a freshly downloaded image file. Same "Lock" symptoms. I also locally built the image and got the same "Lock" symptoms. I know the generic advice is to check my USB cable. I've tried about a half dozen different cables between my phone and CS, but I don't really think that's the problem.

I'm just starting my spelunking in the source code, but I wonder if someone has already been down this path and figured it out. (I'm not providing any logs at the moment because I don't want to bother someone into spending time on this unless it's something they already have ideas about. I can provide them if desired.) My hypothesis at the moment is something changed in an Android monthly update, and now the handshaking between my phone and CS is getting something confused. Things definitely get as far as CS recording my phone info into the /tmp/android_device file.