There is no sound output from my laptop (ACER 5920) speakers. The weird thing is that the sound is being output to my head phones when i plug them in.

uname -a
Linux localhost.localdomain 2.6.23.1-42.fc8 #1 SMP Tue Oct 30 13:55:12 EDT 2007 i686 i686 i386 GNU/Linux

lspci | grep Audio
00:1b.0 Audio device: Intel Corporation 82801H (ICH8 Family) HD Audio Controller (rev 04)


modinfo snd-hda-intel

filename: /lib/modules/2.6.23.1-42.fc8/kernel/sound/pci/hda/snd-hda-intel.ko
description: Intel HDA driver
license: GPL
alias: pci:v000010DEd00000AC3sv*sd*bc*sc*i*
alias: pci:v000010DEd00000AC2sv*sd*bc*sc*i*
alias: pci:v000010DEd00000AC1sv*sd*bc*sc*i*
alias: pci:v000010DEd00000AC0sv*sd*bc*sc*i*
alias: pci:v000010DEd00000777sv*sd*bc*sc*i*
alias: pci:v000010DEd00000776sv*sd*bc*sc*i*
alias: pci:v000010DEd00000775sv*sd*bc*sc*i*
alias: pci:v000010DEd00000774sv*sd*bc*sc*i*
alias: pci:v000010DEd000007FDsv*sd*bc*sc*i*
alias: pci:v000010DEd000007FCsv*sd*bc*sc*i*
alias: pci:v000010DEd0000055Dsv*sd*bc*sc*i*
alias: pci:v000010DEd0000055Csv*sd*bc*sc*i*
alias: pci:v000010DEd0000044Bsv*sd*bc*sc*i*
alias: pci:v000010DEd0000044Asv*sd*bc*sc*i*
alias: pci:v000010DEd000003F0sv*sd*bc*sc*i*
alias: pci:v000010DEd000003E4sv*sd*bc*sc*i*
alias: pci:v000010DEd00000371sv*sd*bc*sc*i*
alias: pci:v000010DEd0000026Csv*sd*bc*sc*i*
alias: pci:v000010B9d00005461sv*sd*bc*sc*i*
alias: pci:v00001039d00007502sv*sd*bc*sc*i*
alias: pci:v00001106d00003288sv*sd*bc*sc*i*
alias: pci:v00001002d0000AA00sv*sd*bc*sc*i*
alias: pci:v00001002d0000960Csv*sd*bc*sc*i*
alias: pci:v00001002d00007919sv*sd*bc*sc*i*
alias: pci:v00001002d0000793Bsv*sd*bc*sc*i*
alias: pci:v00001002d00004383sv*sd*bc*sc*i*
alias: pci:v00001002d0000437Bsv*sd*bc*sc*i*
alias: pci:v00008086d0000293Fsv*sd*bc*sc*i*
alias: pci:v00008086d0000293Esv*sd*bc*sc*i*
alias: pci:v00008086d0000284Bsv*sd*bc*sc*i*
alias: pci:v00008086d0000269Asv*sd*bc*sc*i*
alias: pci:v00008086d000027D8sv*sd*bc*sc*i*
alias: pci:v00008086d00002668sv*sd*bc*sc*i*
depends: snd-pcm,snd-page-alloc,snd,snd-hwdep
vermagic: 2.6.23.1-42.fc8 SMP mod_unload 686 4KSTACKS
parm: power_save:Automatic power-saving timeout (in second, 0 = disable). (int)
parm: index:Index value for Intel HD audio interface. (int)
parm: id:ID string for Intel HD audio interface. (charp)
parm: model:Use the given board model. (charp)
parm: position_fix:Fix DMA pointer (0 = auto, 1 = none, 2 = POSBUF, 3 = FIFO size). (int)
parm: probe_mask:Bitmask to probe codecs (default = -1). (int)
parm: single_cmd:Use single command to communicate with codecs (for debugging only). (bool)
parm: enable_msi:Enable Message Signaled Interrupt (MSI) (int)
parm: power_save_controller:Reset controller in power save mode. (bool)
parm: enable:bool

What version/distro of Linux are you using?

Also, check the mixer settings (try running either alsamixer or run the kmix application from the KDE sound applet, but you don't say anything about your desktop either). Often times, the speakers are muted by default. Since you're getting headphones sound, that points to things being muted.

I am using gnome on fedora 8.

alsamixer -c 0

The following is the configuration for PC Speaker

Card: HDA Intel
Chip: Realtek ALC888
View: [Playback] Capture All
Item: PC Speaker [dB gain=12.00, 12.00]

and the volume is set to full.

Just try running "alsamixer", without the "-c 0". See if any channels are muted.

look at my thread for the MSI laptop very similar to your problem (got it working )

In Acer laptops the internal speaker points to "Surround" and not to "PC Speaker" or "Front". By default "Surround" is muted. I unmuted it and sound works properly now.

That's what I suggested in my first couple of posts, to check to see if any channels were muted.

Glad it worked.

ya. thanks :-)