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Subjecti810_audio problems + patch
Hi Alan,
somewhere between 2.4.18 and 2.4.19 i810_audio.c was changed to exclude
softmodems from initilization. Since then, i cannot use the mixer anymore
and also 44.1khz rates don't work anymore. Reverting the change made these
things work again.
I don't know if it's right what i did, could you please have a look at the
attached patch ?
For completeness, here is the output of dmesg and lspci -vv:

non-working:
i810: Intel 440MX found at IO 0x8400 and 0x8200, IRQ 5
i810_audio: Audio Controller supports 2 channels.
ac97_codec: AC97 Audio codec, id: 0x4358:0x5442 (Unknown)
i810_audio: codec 0 is a softmodem - skipping.

working:
i810: Intel 440MX found at IO 0x8400 and 0x8200, IRQ 5
i810_audio: Audio Controller supports 2 channels.
ac97_codec: AC97 Audio codec, id: 0x4358:0x5442 (Unknown)
i810_audio: AC'97 codec 0 Unable to map surround DAC's (or DAC's not
present), total channels = 2

00:00.1 Multimedia audio controller: Intel Corp. 82440MX AC'97 Audio
Controller
Subsystem: Samsung Electronics Co Ltd: Unknown device 2325
Control: I/O+ Mem- BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
Status: Cap- 66Mhz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
Latency: 0
Interrupt: pin B routed to IRQ 5
Region 0: I/O ports at 8200 [size=256]
Region 1: I/O ports at 8400 [size=64]

Thanks & bye,
Patrick
diff -urN linux-2.4.20-pre4-clean/drivers/sound/i810_audio.c linux-2.4.20-pre4/drivers/sound/i810_audio.c
--- linux-2.4.20-pre4-clean/drivers/sound/i810_audio.c 2002-08-29 01:56:03.000000000 +0200
+++ linux-2.4.20-pre4/drivers/sound/i810_audio.c 2002-08-31 17:44:36.000000000 +0200
@@ -2697,14 +2697,6 @@
break;
}

- codec->codec_write(codec, AC97_EXTENDED_MODEM_ID, 0L);
- if(codec->codec_read(codec, AC97_EXTENDED_MODEM_ID))
- {
- printk(KERN_WARNING "i810_audio: codec %d is a softmodem - skipping.\n", num_ac97);
- kfree(codec);
- continue;
- }
-
card->ac97_features = eid;

/* Now check the codec for useful features to make up for
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