Public bug reported:
The popular pimoroni fan-shim uses the serial lines on the GPIO header
to control an RGBLED. The default configuration of Ubuntu includes a
serial console, which can interrupt the u-boot process with an
appropriately timed key-press. When the fan-shim is installed, it
effectively spams the serial console continuously with the result that
the boot process is interrupted and lots of repeated characters appear
on the screen.
The workaround, for now, is to add the following line to the syscfg.txt
file, disabling the serial port:
enable_uart=0
** Affects: u-boot (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1873520
Title:
fan-shim interrupts u-boot
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