popcornmix

rpi-update firmware contains support for this

It seem unlikely that start.elf firmware could cause an issue like this in the kernel driver (but it's conceivable that some prior setup has had an effect). Best way to...

That commit seems surprising. Are you sure that is the first firmware update that has the issue? i.e. the previous firmware "firmware: arm_loader_dvfs: Make arm only see its own boosts"...

> How can I check which DTB file is selected on a running system? ```sudo vcdbg log msg``` should include the dtb files loaded.

Just clone the git repo and follow build instructions in README. It only takes a minute to build and has minimal dependencies.

> Can't we conclude https://github.com/raspberrypi/firmware/commit/afc7631bc9a58f94a157503955881ab27a6287d0 change somehow broke default downstream DTBs selection in root FAT filesystem, with no further tests? Based on the evidence you've provided that sounds likely. The...

You may be able to use a static build of vcdbg. See https://github.com/raspberrypi/Raspberry-Pi-OS-64bit/issues/67#issuecomment-653209729

The two vcdbg logs are identical (ignoring the timestamps). > I even have some successes with https://github.com/raspberrypi/firmware/commit/afc7631bc9a58f94a157503955881ab27a6287d0 (though it fails frequently). Are you sure the preceding commit is 100% working?...

@illmillrig have you got `hdmi_enable_4kp60=1` in config.txt? We do boost clocks for 4kp60 users and that change may also help your case.

> It isn’t listed: it’s a Samsung 970 EVO 1TB. It woks on Raspberry Pi OS: On RPiOS can you run [update to 6.6 kernel](https://forums.raspberrypi.com/viewtopic.php?t=361116) and confirm you see the...