I noticed that when I use boot options which imply sound as they give
speech messages in the boot process (eg. swspeak, brltty, etc) then the
vol option for setting volume level doesn't work (IE. volume always ends
up being 90%). This is a problem when using a system with no physical
volume control (eg. a laptop using internal speakers).

This is using the grml 2009.05 CD.

Bugreport by Michael Whapples.