Startup time: report and potential issues

[chauser]

I measured the startup time from issuing a "reboot" command in an ssh session 'til when the various things appeared on the built-in screen.
From reboot command to startup splash screen: about 24 seconds (of which 7 seconds took place before the screen stopped updating)
'til the ethernet address appeared on the screen: another 16 seconds
'til the WiFi address appeared on the screen: another 45 seconds

Possible issues: first, the long delay in the appearance of the WiFi address (and also the appearance of the WiFi network as observed from another computer) is possibly fixable. During this delay dmesg puts out many lines with the general form

brcmfmac: brcmf_set_channel: set chanspec 0x100c fail, reason -52

with various values for chanspec. The WiFi coming up seems to correspond to the end of these messages.

The second possible issue is that on one occasion, following the reboot command the device appeared to hang -- it never showed the splash screen and just sat there with the green light on and the display showing what it was showing at the time of the reboot, but not spinning the slashes at the top right, updating the voltage, or flashing the CAN status -- all things it normally does while running.

To get out of this state, I power-cycled the device. It appeared to boot up normally but it took several minutes before I could actually connect to it over the web interface (nothing happening rather than any error). It was pingable on both the ethernet and wifi, but attempts to connect with ssh also hung (nothing happening as well). Eventually it got back to normal. I suspect it was doing file system checking but don't know how I could confirm that.

[bhjelstrom]

Hi @chauser, what does you WiFi configuration look like? Are you using the default channel selection at 2.4Ghz?

You might see an improvement switching to automatic channel selection at 5Ghz