[haiku-bugs] Re: [Haiku] #8270: [HDA] very quiet on Lenovo laptop (due to hda mixer?)
- From: "ttcoder" <trac@xxxxxxxxxxxx>
- Date: Thu, 05 Jan 2012 21:51:04 -0000
#8270: [HDA] very quiet on Lenovo laptop (due to hda mixer?)
---------------------------------+----------------------------
Reporter: ttcoder | Owner: korli
Type: bug | Status: new
Priority: normal | Milestone: R1
Component: Drivers/Audio/HDA | Version: R1/Development
Resolution: | Keywords:
Blocked By: | Blocking:
Has a Patch: 0 | Platform: All
---------------------------------+----------------------------
Comment (by ttcoder):
listdev:
{{{
device Multimedia controller (Audio device) [4|3|0]
vendor 8086: Intel Corporation
device 284b: 82801H (ICH8 Family) HD Audio Controller
}}}
And it so happens that I waited until '''finding (a) culprit''', before
filing this ticket. As of tonight, after a few weeks of fiddling with the
HDA driver, I now have FULL volume in Haiku. Here's the diff I applied:
{{{
~/Desktop/haiku_GIT/hda> diff hda_codec_ORIGINAL.cpp hda_codec.cpp
1040c1041,1042
< if (!hda_audio_group_build_output_tree(audioGroup, true)) {
---
> // if (!hda_audio_group_build_output_tree(audioGroup, true))
> {
}}}
This of course cannot be commited as-is to the source-tree, but hopefully
it will help find the root cause.. :-)
Looking at the syslog, I see that the hda-mixer has a 'offset' that
differs' from its 'number of steps' (20 vs. 43).. noticed that this is
atypical of the other entries listed in the syslog, though dunno if it's
significant for sure..:
{{{
KERN: 23: Audio mixer
KERN: Supported power states: D0 D1 D2 D3
KERN: [Power] [Conn. list] [Amplifier override] [In amplifier] [Stereo]
KERN: In Amp: supports mute, step size: 1.5 dB, # steps: 43, offset to 0
dB: 20 (0x80052B14)
KERN: Inputs: 25 20 18 17 21
}}}
I'm available for questions, tests ..etc that could help fix this for
good.
Thanks.
--
Ticket URL: <http://dev.haiku-os.org/ticket/8270#comment:1>
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