do you mean HDMI audio work ?
control.8 {
iface CARD
name 'HDMI/DP,pcm=7 Jack'
value true
comment {
access read
type BOOLEAN
count 1
}
}
do your video driver pass ELD to audio controller ?
cat /proc/asound/card1/eld#1.0
what are the period size and buffer size for HDMI audio ?
cat /proc/asound/card1/pcm1p/sub0/hw_params
Codec: Nvidia GPU 15 HDMI/DP
Address: 1
AFG Function Id: 0x1 (unsol 0)
Vendor Id: 0x10de0015
Subsystem Id: 0x10de0101
Revision Id: 0x100100
No Modem Function Group found
Default PCM:
rates [0x0]:
bits [0x0]:
formats [0x0]:
Default Amp-In caps: N/A
Default Amp-Out caps: N/A
State of AFG node 0x01:
Power states: D0 D1 D2 D3
Power: setting=D0, actual=D0
GPIO: io=0, o=0, i=0, unsolicited=0, wake=0
Node 0x04 [Audio Output] wcaps 0x72b1: 8-Channels Digital Stripe CP
Device: name="HDMI 0", type="HDMI", device=7
Converter: stream=6, channel=0
Digital: Enabled
Digital category: 0x0
IEC Coding Type: 0x0
PCM:
rates [0x7f0]: 32000 44100 48000 88200 96000 176400 192000
bits [0xe]: 16 20 24
formats [0x5]: PCM AC3
Unsolicited: tag=00, enabled=0
Node 0x05 [Pin Complex] wcaps 0x407381: 8-Channels Digital CP
Control: name="HDMI/DP,pcm=7 Jack", index=0, device=0
Control: name="IEC958 Playback Con Mask", index=1, device=0
Control: name="IEC958 Playback Pro Mask", index=1, device=0
Control: name="IEC958 Playback Default", index=1, device=0
Control: name="IEC958 Playback Switch", index=1, device=0
Control: name="ELD", index=0, device=7
Pincap 0x09000094: OUT Detect HBR HDMI DP
Pin Default 0x18560010: [Jack] Digital Out at Int HDMI
Conn = Digital, Color = Unknown
DefAssociation = 0x1, Sequence = 0x0
Pin-ctls: 0x40: OUT
Unsolicited: tag=01, enabled=1
Connection: 1
0x04
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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to alsa-driver in Ubuntu.
https://bugs.launchpad.net/bugs/1181721
Title:
NVIDIA HDMI audio needs a bigger bdl_pos_adj
Status in “alsa-driver” package in Ubuntu:
Confirmed
Bug description:
Right after my system finishes booting, when it plays the welcome
sound, I get this in dmesg:
hda-intel: IRQ timing workaround is activated for card #1. Suggest a
bigger bdl_pos_adj
This gives me a few bad side effects:
1) Sound latency is way too high with pulseaudio, and it's even higher
with alsa dmix.
2) Bad sound quality in most of the games I've tried (sound
interrupts, distortion, lots of buffer underruns).
3) Crackling noise in MAME (specially with older games).
Adding the following line to "/etc/modprobe.d/alsa-base.conf" seems to solve
my problems:
options snd-hda-intel enable_msi=1 bdl_pos_adj=-1,64
After that, I don't get the error in dmesg anymore, sound latency is
much better, and the buffer underruns / crackling are gone.
So I suggest a bigger "bdl_pos_adj" should be made default for NVIDIA
HDMI sound cards. I'm not saying it should be 64, because this value
is guessed.
-1, 1, 32 will give me the error in dmesg and all related problems
48 gives me mixed results, no error in dmesg, but I still get buffer
underruns sometimes
64 gives me bigger latency than 48, but I didn't get any buffer
underruns with this value so far.
ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: alsa-base 1.0.25+dfsg-0ubuntu4
Uname: Linux 3.9.0-030900-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.9.2-0ubuntu8
Architecture: amd64
Date: Sun May 19 07:50:55 2013
MarkForUpload: True
PackageArchitecture: all
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No
PulseAudio daemon running, or not running as session daemon.
SourcePackage: alsa-driver
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/17/2012
dmi.bios.vendor: Intel Corp.
dmi.bios.version: BGP6710J.86A.2209.2012.0717.2302
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: DP67BG
dmi.board.vendor: Intel Corporation
dmi.board.version: AAG10491-306
dmi.chassis.type: 3
dmi.modalias:
dmi:bvnIntelCorp.:bvrBGP6710J.86A.2209.2012.0717.2302:bd07/17/2012:svn:pn:pvr:rvnIntelCorporation:rnDP67BG:rvrAAG10491-306:cvn:ct3:cvr:
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