When I close the lid or type pm-suspend, I get a beep from my Thinkpad X220 running Xubuntu. How do I remove that beep?
It is louder if the volume is louder, so it's from the regular speakers (also, alsamixer has Beep muted and lsmod says I have neither snd_pcsp nor pcspkr loaded).
I think the beep came with an update some months ago.
I guess I was wrong in guessing the beep came with an update (perhaps I muted volume a lot); on Thinkpads there is a BIOS setting for the beep that comes on all "power events" (plugging cord, suspend, etc.) This fixed it :)