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HATs and other add-ons • Re: Pi4 TV-HAT continuity errors when ARM clock <1500MHz

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> Is there some else who has similar experience? So TFTP/BOOTP and networked root filesystem and burst/random errors.

I also see bursts of continuity errors since upgrading the software on my pi, and my set up is similar but not identical.

My set up is like this: the 3B+ has a TV hat, and runs tvheadend. The rootfs is on sd, but the storage for tvheadend is over NFS over wifi.

I had been running older software (last upgraded ~Autumn 2024), which was stable except the wifi would randomly lock up every couple of months - other than that, TV reception was absolutely solid. I did a dist-upgrade to pick up latest packages and the 6.12 kernel, and TV reception is now bad - with a continuity errors when streaming over wifi every few minutes. When watching TV locally with kodi, reception is completely unusable - no picture appears. (edit: this might be a separate problem)

I reverted the kernel to 6.6, but no change.

As a workaround, I have set the max CPU frequency to 600MHz:

Code:

echo 600000 | sudo tee cpu*/cpufreq/scaling_max_freq
and TV reception over wifi is now stable again, although I haven't tried kodi yet.

I am also wondering if this could be the result of a firmware change, but I haven't got backups or older logs to be sure what version was there before.

Statistics: Posted by Iryab — Sun Apr 27, 2025 2:54 pm



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