diff options
Diffstat (limited to 'Documentation/sound/alsa/ALSA-Configuration.txt')
| -rw-r--r-- | Documentation/sound/alsa/ALSA-Configuration.txt | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/Documentation/sound/alsa/ALSA-Configuration.txt b/Documentation/sound/alsa/ALSA-Configuration.txt index 12e3a0fb9be..8c16d50f6cb 100644 --- a/Documentation/sound/alsa/ALSA-Configuration.txt +++ b/Documentation/sound/alsa/ALSA-Configuration.txt @@ -860,7 +860,8 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed. [Multiple options for each card instance] model - force the model name - position_fix - Fix DMA pointer (0 = auto, 1 = use LPIB, 2 = POSBUF) + position_fix - Fix DMA pointer (0 = auto, 1 = use LPIB, 2 = POSBUF, + 3 = VIACOMBO, 4 = COMBO) probe_mask - Bitmask to probe codecs (default = -1, meaning all slots) When the bit 8 (0x100) is set, the lower 8 bits are used as the "fixed" codec slots; i.e. the driver probes the @@ -925,6 +926,11 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed. (Usually SD_LPIB register is more accurate than the position buffer.) + position_fix=3 is specific to VIA devices. The position + of the capture stream is checked from both LPIB and POSBUF + values. position_fix=4 is a combination mode, using LPIB + for playback and POSBUF for capture. + NB: If you get many "azx_get_response timeout" messages at loading, it's likely a problem of interrupts (e.g. ACPI irq routing). Try to boot with options like "pci=noacpi". Also, you @@ -2038,7 +2044,7 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed. Install the necessary firmware files in alsa-firmware package. When no hotplug fw loader is available, you need to load the firmware via vxloader utility in alsa-tools package. To invoke - vxloader automatically, add the following to /etc/modprobe.conf + vxloader automatically, add the following to /etc/modprobe.d/alsa.conf install snd-vx222 /sbin/modprobe --first-time -i snd-vx222 && /usr/bin/vxloader @@ -2162,10 +2168,10 @@ corresponds to the card index of ALSA. Usually, define this as the same card module. An example configuration for a single emu10k1 card is like below: ------ /etc/modprobe.conf +----- /etc/modprobe.d/alsa.conf alias snd-card-0 snd-emu10k1 alias sound-slot-0 snd-emu10k1 ------ /etc/modprobe.conf +----- /etc/modprobe.d/alsa.conf The available number of auto-loaded sound cards depends on the module option "cards_limit" of snd module. As default it's set to 1. @@ -2178,7 +2184,7 @@ cards is kept consistent. An example configuration for two sound cards is like below: ------ /etc/modprobe.conf +----- /etc/modprobe.d/alsa.conf # ALSA portion options snd cards_limit=2 alias snd-card-0 snd-interwave @@ -2188,7 +2194,7 @@ options snd-ens1371 index=1 # OSS/Free portion alias sound-slot-0 snd-interwave alias sound-slot-1 snd-ens1371 ------ /etc/modprobe.conf +----- /etc/modprobe.d/alsa.conf In this example, the interwave card is always loaded as the first card (index 0) and ens1371 as the second (index 1). |