dv7t Subwoofer Issue

[P4man]

W
Also, there is no LFE option in alsamixer[SIZE=1]. This is what I have on output:

Master
Headphon
Bass Spe
PCM
Mic Jack
IEC958
IEC958 D
IEC958 P
IEC958 1
Beep
Speaker

And changing the "bass spe" slider makes no difference?

[Lancelot59]

There is no slider for the bass speaker.

Also when I shutdown or restart the sub emits this very startling loud noise...not good. Can I make a script that automatically mutes it?

[lidex]

Try out some different model options in your alsa-base.conf. Replace 'model=hp-dv5' with 'model=dell-m4-1' and reboot. One more to try is 'model=dell-m4-2' (no quotes).

[Lancelot59]

How would changing it to a completely unrelated model help? Do they all use the same chipset?

Also, about the massive pop that the sub emits when the machine starts to shut down, is there anything we can do about that?

[lidex]

How would changing it to a completely unrelated model help? Do they all use the same chipset?

Also, about the massive pop that the sub emits when the machine starts to shut down, is there anything we can do about that?

Yeah, same chipset.
You might try disabling (remove or comment out) power management option line in alsa-base.conf for the pop.

[Lancelot59]

Where would that be? Is it the one I highlighted with bold? Also, should I upgrade to the latest version of ubuntu before trying this?

# autoloader aliases
install sound-slot-0 /sbin/modprobe snd-card-0
install sound-slot-1 /sbin/modprobe snd-card-1
install sound-slot-2 /sbin/modprobe snd-card-2
install sound-slot-3 /sbin/modprobe snd-card-3
install sound-slot-4 /sbin/modprobe snd-card-4
install sound-slot-5 /sbin/modprobe snd-card-5
install sound-slot-6 /sbin/modprobe snd-card-6
install sound-slot-7 /sbin/modprobe snd-card-7

# Cause optional modules to be loaded above generic modules
install snd /sbin/modprobe --ignore-install snd $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-ioctl32 ; /sbin/modprobe --quiet --use-blacklist snd-seq ; }
#
# Workaround at bug #499695 (reverted in Ubuntu see LP #319505)
install snd-pcm /sbin/modprobe --ignore-install snd-pcm $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-pcm-oss ; : ; }
install snd-mixer /sbin/modprobe --ignore-install snd-mixer $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-mixer-oss ; : ; }
install snd-seq /sbin/modprobe --ignore-install snd-seq $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-seq-midi ; /sbin/modprobe --quiet --use-blacklist snd-seq-oss ; : ; }
#
install snd-rawmidi /sbin/modprobe --ignore-install snd-rawmidi $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-seq-midi ; : ; }
# Cause optional modules to be loaded above sound card driver modules
install snd-emu10k1 /sbin/modprobe --ignore-install snd-emu10k1 $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-emu10k1-synth ; }
install snd-via82xx /sbin/modprobe --ignore-install snd-via82xx $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist snd-seq ; }

# Load saa7134-alsa instead of saa7134 (which gets dragged in by it anyway)
install saa7134 /sbin/modprobe --ignore-install saa7134 $CMDLINE_OPTS && { /sbin/modprobe --quiet --use-blacklist saa7134-alsa ; : ; }
# Prevent abnormal drivers from grabbing index 0
options bt87x index=-2
options cx88_alsa index=-2
options saa7134-alsa index=-2
options snd-atiixp-modem index=-2
options snd-intel8x0m index=-2
options snd-via82xx-modem index=-2
options snd-usb-audio index=-2
options snd-usb-us122l index=-2
options snd-usb-usx2y index=-2
options snd-usb-caiaq index=-2
# Ubuntu #62691, enable MPU for snd-cmipci
options snd-cmipci mpu_port=0x330 fm_port=0x388
# Keep snd-pcsp from being loaded as first soundcard
options snd-pcsp index=-2
# Power down HDA controllers after 10 idle seconds
options snd-hda-intel power_save=10 power_save_controller=N

# OPTIONS ADDED BY USER
options snd-hda-intel model=hp-dv5
options snd-hda-intel enable_msi=1

[lidex]

Yes, that's the one.
An upgrade could help.

[Lancelot59]

Alright, I'll upgrade to the latest kernel and see how it performs.

[opethfan89]

Lancelot,

I also own a dv7 laptop and had this exact same problem. For me, it was sound playing ONLY out of subwoofer and not speakers, but there was no terrible resonance problem.

Anyways, I am attaching a text file with the notes I wrote to myself about how to fix audio. I hope that they work for you and sorry if any of the spacing doesn't make sense, I had to convert the spacing over from Ubuntu to Windows.

Cheers,
Opethfan89

[lidex]

These are the actual options I have in my alsa-base.conf on my Dv7t running jaunty x64 with alsa 1.0.21. Codec is IDT 92HD75B3X5.
I had to upgrade alsa and add options to get any sound at all.

options snd-hda-intel model=3stack-6ch enable=yes
options snd-hda-intel position_fix=1 enable=yes
options snd-hda-intel enable_msi=1