Takashi, I'm now using 5.14.21-150400.24.41-default on an AMD Ryzen Dell Inspiron laptop. Once again Bell is malfunctioning in certain situations. I loaded the X modules per comment 10. Xbiff -- no bell. vi -- no bell echo \007 -- no bell xkbbell -- this works xkkbell -force -- no bell I only use this laptop when travelling, so it is a very small issue. Please let me know if you would like to investigate further? Thanks, Ole