Messages in this thread Patch in this message | | | Date | Mon, 5 Jul 2010 12:20:24 +0100 | Subject | re: PC Beeps not working with HDA Intel module | From | Daniel J Blueman <> |
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On Jun 26, 12:40 pm, Shérab <Sebastien.Hinderer@ens-lyon.org> 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 ? > > Should you need any additional bit of information or testing, please ask.
I was finding the same with my Dell Studio 1557.
It may be worth using some printk calls [1] showing what frequency value is sent to the codec, then checking with the codec datasheet - we'll need to know which one, eg from 'dmesg' or 'alsa-info.sh' (from http://www.alsa-project.org/alsa-info.sh).
We'll probably need to check the configuration registers of the beep widget to check what divider it's using...
Thanks, Daniel
--- [1]
diff --git a/sound/pci/hda/hda_beep.c b/sound/pci/hda/hda_beep.c index 29714c8..98d0d6c 100644 --- a/sound/pci/hda/hda_beep.c +++ b/sound/pci/hda/hda_beep.c @@ -69,6 +69,7 @@ static int beep_linear_tone(struct hda_beep *beep, int hz) hz /= DIGBEEP_HZ_STEP; hz = 255 - hz; } + printk(KERN_ERR "HDA beep: linear value %d\n", hz); return hz; }
@@ -87,6 +88,7 @@ static int beep_standard_tone(struct hda_beep *beep, int hz) return 0xff; if (hz <= 0) return 1; + printk(KERN_ERR "HDA beep: standard value %d\n", hz); return hz; }
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