I set up my daughter's Debian PC and everything is working except the X11VNC autorun. It runs fine when launched from the command line, but when I enter it into Startup Programs, it doesn't start like it's supposed to. I still have to launch it manually.

Here's the command I'm using:
Enter that into command prompt, and everything works great. Enter it into the "command" field of the "Add Startup Program" window and it doesn't work. I've tried adding a 10-second and 30-second delay, and still no dice. To check if Startup Programs work at all, I made an entry for LibreOffice Calc to launch 10 seconds after login. I rebooted the machine and it worked great. So I tried X11VNC again and still nothing.

I don't get it. What am I missing here? If the command works when manually entered at a prompt, shouldn't it work just fine in the command field of the startup applications?

I discovered that autorun programs should not use "~" in place of "/home/user". I had the same problem, but it was fixed by switching to "/home/user". Probably because as the display manager starts and starts the desktop environment, it uses a virtual user to start, so it doesn't have a home directory and can't log there. When you enter it into a prompt, however, you are a real user, and you can use "~". I'm also not sure if anything other than Bash can replace that symbol with $HOME.

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Thank you, that worked! I replaced the "~" with the full path and now it starts up normally. I didn't use $HOME or any variant of that because I thought I tried that before and it didn't work. I'd have to check again to be sure. Either way, here's the command that now launches at startup:
Everything works as it should. Thank you for your help.