Dell XPS 9575 has black screen during boot after update to Linux kernel 5.14

Linux doesn’t boot with kernel 5.14, shows caleidoscope of colourful lines instead. Boots normally with 5.12.

journalctl ERROR: _____ kernel: i915 0000:00:02.0: [drm] *ERROR* CPU pipe A FIFO underrun

Please, help! Main topic created here.