audigy se щелчки

что ж за непруха, в слепую, сложно канешн, если б мог воспроизвести вашу ситуёвину, вот ещё вариант пропатчить ca0106_main.c

575,576c575,576
< 		chip->spi_dac_reg[reg] |= spi_dacd_bit[epcm->channel_id];
< 		snd_ca0106_spi_write(chip, chip->spi_dac_reg[reg]);
---
> 		/*chip->spi_dac_reg[reg] |= spi_dacd_bit[epcm->channel_id];
> 		snd_ca0106_spi_write(chip, chip->spi_dac_reg[reg]);*/
1827c1827
< 	struct snd_card *card = pci_get_drvdata(pci);
---
> /*	struct snd_card *card = pci_get_drvdata(pci);
1843c1843
< 	return 0;
---
> 	return 0;*/

если не поможет, то дело не в powersave, а где-нибудь тут, при остановке чипа и очистке памяти

static void ca0106_stop_chip(struct snd_ca0106 *chip)
{
        /* disable interrupts */
        snd_ca0106_ptr_write(chip, BASIC_INTERRUPT, 0, 0);
        outl(0, chip->port + INTE);
        snd_ca0106_ptr_write(chip, EXTENDED_INT_MASK, 0, 0);
        udelay(1000);
        /* disable audio */
        /* outl(HCFG_LOCKSOUNDCACHE, chip->port + HCFG); */
        outl(0, chip->port + HCFG);
        /* FIXME: We need to stop and DMA transfers here.
         *        But as I am not sure how yet, we cannot from the dma pages.
         * So we can fix: snd-malloc: Memory leak?  pages not freed = 8
         */
}

, тут

static int snd_ca0106_pcm_close_playback(struct snd_pcm_substream *substream)
{
        struct snd_ca0106 *chip = snd_pcm_substream_chip(substream);
        struct snd_pcm_runtime *runtime = substream->runtime;
        struct snd_ca0106_pcm *epcm = runtime->private_data;
        chip->playback_channels[epcm->channel_id].use = 0;

        restore_spdif_bits(chip, epcm->channel_id);

        if (chip->details->spi_dac && epcm->channel_id != PCM_FRONT_CHANNEL) {
                const int reg = spi_dacd_reg[epcm->channel_id];

                /* Power down DAC */
                /*chip->spi_dac_reg[reg] |= spi_dacd_bit[epcm->channel_id];
                snd_ca0106_spi_write(chip, chip->spi_dac_reg[reg]);*/
        }
        /* FIXME: maybe zero others */
        return 0;
}

или тут

static int snd_ca0106_pcm_close_capture(struct snd_pcm_substream *substream)
{
        struct snd_ca0106 *chip = snd_pcm_substream_chip(substream);
        struct snd_pcm_runtime *runtime = substream->runtime;
        struct snd_ca0106_pcm *epcm = runtime->private_data;
        chip->capture_channels[epcm->channel_id].use = 0;
        /* FIXME: maybe zero others */
        return 0;
}

нет подходящего образца платы для тестирования =(