Installing linux-backports-modules does not fix the problem on my HP
dv9000. I reproduced the bug by playing a file in rhythmbox and turning
up the right channel in alsamixer and then the left channel. While my
aplay lists my card as hda nvidia, the codec that's used by ALSA is hda
intel, because apparently the two are similar enough for it to work. My
headphone channel on my laptop has always "worked fine".
Am I missing the workaround? I installed the linux-backports-modules-
hardy package.
$aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: NVidia [HDA NVidia], device 0: CONEXANT Analog [CONEXANT Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: NVidia [HDA NVidia], device 1: Conexant Digital [Conexant Digital]
Subdevices: 1/1
Subdevice #0: subdevice #0
$uname -a
Linux Stormbringer 2.6.24-16-generic #1 SMP Thu Apr 10 12:47:45 UTC 2008 x86_64
GNU/Linux
lspci -v of my audio device:
00:07.0 Audio device: nVidia Corporation MCP67 High Definition Audio (rev a1)
Subsystem: Hewlett-Packard Company Unknown device 30cf
Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 21
Memory at f6480000 (32-bit, non-prefetchable) [size=16K]
Capabilities: [44] Power Management version 2
Capabilities: [50] Message Signalled Interrupts: Mask+ 64bit+ Queue=0/0
Enable-
Capabilities: [6c] HyperTransport: MSI Mapping
--
left-channel distortion on intel-hda
https://bugs.launchpad.net/bugs/75906
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