I made answer, probably in october 2020 (guessing from my login data), which was about keyboard problem after boot.
According to it - keyboard stoped to work after some upgrades. I discovered, that problem appeared after upgrading to recent kernel, which was 5.4.0-48 for that moment, while keybord only worked at 5.4.0-42 as last. The only possible solution, which I proposed, was to downgrade kernel. Now this bug is not actual, but there's actual one.
My reply about solution was there for some time, but than someone removed it without reason, only to be replaced with other, yet less exact. What's curious - it happens so, that neither my or removal activity is visible - all looks like it's removed not only from eyes, but also from history as well. As far as I got from login data, I answered at 2020.10.02, later - probably edited (I see next login date at 2020.10.03).
Need reason for that removal.