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Old 10-07-2005, 08:18 PM   #1
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Distortion with ICH6 onboard audio + ALSA...


I've been having some slight troubles with my onboard sound chip, an Intel ICH6 family chip. This is the output from 'lspci -v':

0000:00:1e.2 Multimedia audio controller: Intel Corporation 82801FB/FBM/FR/FW/FRW (ICH6 Family) AC'97 Audio Controller (rev 04)
        Subsystem: Acer Incorporated [ALI]: Unknown device 006a
        Flags: bus master, medium devsel, latency 0, IRQ 10
        I/O ports at 1c00 [size=256]
        I/O ports at 1880 [size=64]
        Memory at 80000800 (32-bit, non-prefetchable) [size=512]
        Memory at 80000400 (32-bit, non-prefetchable) [size=256]
        Capabilities: [50] Power Management version 2
I'm currently using the kernel snd-intel8x0 driver, and there's a small amount of distortion. This is especially noticeable in low bass, high volume, or a combination of both. Sometimes it even happens with no special circumstances at all. Testing this same chip under Windows (dual-boot), there is no distortion at all, whatsoever (well, that I can hear at least).

The laptop I am using this on is an Acer TravelMate C310, and I'm running Gentoo with a 2.6.11 kernel and ALSA version 1.0.9.

Thanks in advance and cheers!
Old 10-08-2005, 12:48 PM   #2
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Distortion is usually caused by overdriving one of the amplification stages. try turning down PCM and turning up the Master volume to compensate.
Old 10-08-2005, 09:59 PM   #3
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Thank you, that solved my problem .


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