At Sat, 26 Jun 2010 13:25:04 +0200, Shérab wrote:
Dear all,
The problem is on a computer with an HDA Intel sound card, Intel G45 DEVCTG chip and appears will all version s of the kernel.
Running e.g. beep 440 produces a beep whose audible frequency is very low, definitely not 440 Hz.
However, it is worth notiing that grub is able to produce a beep of the right frequency at boot time.
Can this problem be fixed ?
There are a few ways.
If you build your kernel with SND_HDA_INPUT_BEEP_MODE=2, or set the option of snd-hda-intel module beep_mode=2, you'll be able to switch to the native beep from HD-audio codec digital beep via muting "Beep" mixer switch.
Or, if the value above is 0, it'll be always the system-native beep. This can be done also via writing sysfs codec hint, as documented in HD-Audio.txt.
Alternatively, you can reload pcspkr module so that it grabs the beep output again over snd-hda-intel, "modprobe -r pcspkr; modprobe pcspkr"
Takashi