CHORE: fix LED flicker in setup-pi (disable sound, isolate core)#3
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Two provisioning tweaks that eliminate visible panel flicker, both idempotent and applied on the next reboot: - Blacklist snd_bcm2835 and set dtparam=audio=off. The Adafruit HAT drives the panel PWM on the same hardware the sound module uses, so onboard sound is the most common flicker source. - Append isolcpus=3 to the kernel cmdline so the matrix refresh thread (pinned to core 3) is not interrupted by the scheduler. The completion message now notes a reboot is needed to apply them.
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Two provisioning tweaks that eliminate visible panel flicker, both idempotent
and applied on the next reboot:
panel PWM on the same hardware the sound module uses, so onboard sound is the
most common flicker source.
to core 3) is not interrupted by the scheduler.
The completion message now notes a reboot is needed to apply them.