Warning: Boot regression in latest kernels (4.19, 5.10 etc.)
#1
Hi folks,

after installing the latest kernel updates, two of my A64-LTS boxes stopped booting. Interestingly, my A64+ boards (not the LTS variants) were not affected. The issue was that the device did not detect the SD card anymore.

It took me quite a while to figure out what was wrong as reverting back to the old kernel did not help. It seems like the updated DTB files are the issue. Booting the new kernel using the old DTB files works fine. This issue affects both kernels from the stable (!) as well as unstable branches in Debian. The affected kernels in Debian are:

- 4.9.181-1 (2021-03-19)
- 5.10.24-1 (2021-03-19)

However, I suspect that this change might affect other distributions as well since the new DTB files were merged directly into the mainline kernel. I suspect the following commit to be causal for the issue:

https://git.kernel.org/pub/scm/linux/ker...35d81cc15d

Therefore, should you encounter the same issue, switch back to the DTB files from the previous kernel.
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