5.1 sound does not work with HDMI audio. There is only option for stereo.

[Lazy]

As you can see from the screenshot. There is no option for anything other than stereo.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: nvidia-current 195.36.15-0ubuntu3
ProcVersionSignature: Ubuntu 2.6.32-22.36-generic 2.6.32.11+drm33.2
Uname: Linux 2.6.32-22-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Sat Jun 5 21:40:49 2010
DkmsStatus:
 nvidia-current, 195.36.15, 2.6.32-22-generic, x86_64: installed
 nvidia-current, 195.36.15, 2.6.32-21-generic, x86_64: installed
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
Lsusb:
 Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 003 Device 002: ID 045e:00f9 Microsoft Corp. Wireless Desktop Receiver 3.1
 Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
 Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
 Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.32-22-generic root=UUID=fc2c3b73-c89d-4462-963d-21e1ed51d0f3 ro quiet splash
ProcEnviron:
 LC_TIME=en_DK.utf8
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: nvidia-graphics-drivers
dmi.bios.date: 05/08/2009
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 080015
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: To be filled by O.E.M.
dmi.board.vendor: To be filled by O.E.M.
dmi.board.version: To be filled by O.E.M.
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr080015:bd05/08/2009:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnTobefilledbyO.E.M.:rnTobefilledbyO.E.M.:rvrTobefilledbyO.E.M.:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.
system:
 distro: Ubuntu
 codename: lucid
 architecture: x86_64
 kernel: 2.6.32-22-generic
xkbcomp:
 Error: command ['xkbcomp', ':0', '-w0', '-'] failed with exit code 1: No protocol specified
 Error: Cannot open display ":0"
                   Exiting

[Artur Rona (ari-tczew)]

I have similiar issue. I use TV as a 2nd video output - connected by HDMI. Sound should be played, but it doesn't work. On Windows sound works with official nvidia drivers.

Already I got Ubuntu 12.04, but this problem I've got since I use TV - it was Ubuntu 9.04.

About this bug - I think that HDMI-sound option is not necessary. TV should plays sound normally.

[dino99 (9d9)]

That version is no more supported; please open a new bug report if the actual archive found version also has the same issue.