Does anyone know why this error occurs? How can it be eliminated? /lib/modules/2.4.22-1.2115.nptl/kernel/sound/acore/snd.o: unresolved symbol schedule_work /lib/modules/2.4.22-1.2115.nptl/kernel/sound/acore/snd.o: insmod /lib/modules/2.4.22-1.2115.nptl/kernel/sound/acore/snd.o failed /lib/modules/2.4.22-1.2115.nptl/kernel/sound/acore/snd.o: insmod snd-intel8x0 failed