The error can be partially resolved by installing oem kernel versions. The error was not present on the newest one available from the repository. I tested several kernel versions after reporting this bug, but I don't remember which version it worked better, for sure since 5.14.0-1007-oem. The sound was good most of the time, but sometimes it faded out, then you had to connect the headphones to the jack socket for a while and disconnect it. However, there was no need to kill pulseaudio on 5.14.0-1007-oem (it was possible to use a laptop on a daily basis). However, I replaced the laptop with a different model so as not to degenerate because the problem was only 90% solved on the new kernel. This chipset 'Cirrus Logic' is probably to blame because I have a new dell vostro 5502 with the same intel i5 (11th gen) processor, but the chipset has 'Realtek ALC3204' and everything works on it.
The error can be partially resolved by installing oem kernel versions. The error was not present on the newest one available from the repository. I tested several kernel versions after reporting this bug, but I don't remember which version it worked better, for sure since 5.14.0-1007-oem. The sound was good most of the time, but sometimes it faded out, then you had to connect the headphones to the jack socket for a while and disconnect it. However, there was no need to kill pulseaudio on 5.14.0-1007-oem (it was possible to use a laptop on a daily basis). However, I replaced the laptop with a different model so as not to degenerate because the problem was only 90% solved on the new kernel. This chipset 'Cirrus Logic' is probably to blame because I have a new dell vostro 5502 with the same intel i5 (11th gen) processor, but the chipset has 'Realtek ALC3204' and everything works on it.