|
From: Shem M. <mul...@gm...> - 2007-03-07 23:41:29
|
On 3/7/07, Tobin Davis <td...@ds...> wrote: > On Wed, 2007-03-07 at 18:12 -0500, Shem Multinymous wrote: > > The ibm-acpi mixer also affects the BIOS-generated sounds (e.g., > low-battery warnings) and PC speaker. So it useful even when the sound > card is unused or unsupported. > > Don't those sounds go through the beep generator? Most codecs use a beep > generator for system sounds, that routes through the codec. In my ThinkPad the system sound volume is affected by ibm-acpi but not by any ALSA mixer settings. As far as I can tell, it behaves as if AC'97 (including all ALSA mixers) and system sound are generated independently, added together, and then scaled by the ibm_acpi mixer. Shem |
