NixOS on ARM/Raspberry Pi: Difference between revisions
imported>Samueldr m Adds breadcrumb |
imported>Samueldr m Adds a note about power issues |
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Using the 3.3v serial port via the pin headers (exact location depends on hardware version) will get u-boot output and, when configured, a Linux kernel console. | Using the 3.3v serial port via the pin headers (exact location depends on hardware version) will get u-boot output and, when configured, a Linux kernel console. | ||
== Troubleshooting == | |||
=== Power issues === | |||
Especially with the power-hungry Raspberry Pi 3, it is important to have a [https://www.raspberrypi.org/documentation/hardware/raspberrypi/power/README.md sufficient enough power supply] or ''weirdness'' may happen. Weirdness may include: | |||
* Lightning bolt on HDMI output "breaking" the display. | |||
* Screen switching back to u-boot text | |||
** Fixable temporarily when power is sufficient by swtiching VT (alt+F2 / alt+F1) | |||
* Random hangs | |||
The only solution is to get a ''properly rated'' USB power supply, AND a good cable. The cable has to be short enough to not incur power losses through the length. Do note that thin and cheap cables usually have thinner copper wires, which in turn accentuates power losses. | |||