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SubjectAudio volume poor in Linux, OK in Win2K
I can't seem to get much volume out of my audio controller.

I have a dual-boot system, Win2K/SP4 and Fedora Core 2 (FC2), both with
all updates applied. The volume is fine in Win2K. In FC2, even with the
volume turned up to 100%, audio output is barely loud enough for voices
to be understood. This is true whether using the built-in speakers or
with headphones. The lack of volume is *not* application dependant.

Prior to installing FC2, I ran RedHat Linux v9 with the most recent 2.4.x
kernel available at that time. The audio volume was also inadaquate in
this environment, yet was still fine in Win2K.

I see no errors or warning in my system logs that might indicate any
problems with the audio driver in use.

My hardware is a HP Presario 2570us notebook, which has an integrated ALi
M5451 audio controller. More detail:

00:06.0 Multimedia audio controller: ALi Corporation M5451 PCI AC-Link
Controller Audio Device (rev 02)
Subsystem: Hewlett-Packard Company: Unknown device 0850
Flags: bus master, medium devsel, latency 64, IRQ 5
I/O ports at 1000
Memory at d4000000 (32-bit, non-prefetchable) [size=4K]
Capabilities: [dc] Power Management version 2

These are the audio-related (kernel v2.6.8) modules seen with lsmod:

snd_ali5451 18888 0
snd_ac97_codec 58500 1 snd_ali5451
snd_pcm 75912 1 snd_ali5451
snd_page_alloc 8584 1 snd_pcm
snd_timer 18692 1 snd_pcm
snd 42596 4
soundcore 6624 1 snd

It seems that the Linux audio subsystem is incapable of producing the
audio volume that I get in Win2K, at least with this hardware. Is there
anything I can do to get more volume in Linux?


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