Comment # 5 on bug 1204742 from Takashi Iwai

Yes, it depends on the hardware.  On some devices, the beep is explicitly
disabled by the driver, but on some, it still remains like your case.

The Beep switch should have been turned off as default on openSUSE, but it
seems that it was turned on accidentally and the system keeps the value.

I close the bug now, as it seems working.  If you encounter the problem again
even if you didn't turn it on explicitly, feel free to reopen; then we need to
hunt who is the culprit.