Difference between revisions of "CS4624"
(Mention driver bug) |
(Added suspend workaround) |
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=== Linux ALSA driver === | === Linux ALSA driver === | ||
| − | This sound chip is supported by the snd-cs46xx kernel module. The driver has a bug in that sound does not work after suspend and resume. | + | This sound chip is supported by the snd-cs46xx kernel module. The driver has a bug in that sound does not work after suspend and resume. If the cs46xx Alsa driver is compiled as a module though, sound can be reinitialized by removing and reloading the module and resetting the alsamixer soundlevels. A simple bash-script (to be run as root) that does this, would look roughly like this: |
| + | |||
| + | <pre>#!/bin/sh | ||
| + | /etc/rc.d/init.d/alsa stop | ||
| + | modprobe -r cs46xx | ||
| + | modprobe cs46xx | ||
| + | /etc/rc.d/init.d/alsa start</pre> | ||
| + | |||
| + | Do note that the link to "/etc/rc.d/init.d/alsa" may have to be modified depending on where your distributions init-files are placed. | ||
| + | |||
If you can't seem to use your mic with this card, open up alsamixer and set the following 3 channels to "capture": MIC, CAPTURE, ADC. Make sure your amixer output contains following: | If you can't seem to use your mic with this card, open up alsamixer and set the following 3 channels to "capture": MIC, CAPTURE, ADC. Make sure your amixer output contains following: | ||
Revision as of 15:33, 11 January 2008
CS4624This is a Cirrus Logic Audio controller Note: This chip is paired with a CS4297A AC'97 Audio controller, only one sound driver should be loaded. Features
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Linux OSS driver
This sound chip is supported by the cs46xx kernel module.
Linux ALSA driver
This sound chip is supported by the snd-cs46xx kernel module. The driver has a bug in that sound does not work after suspend and resume. If the cs46xx Alsa driver is compiled as a module though, sound can be reinitialized by removing and reloading the module and resetting the alsamixer soundlevels. A simple bash-script (to be run as root) that does this, would look roughly like this:
#!/bin/sh /etc/rc.d/init.d/alsa stop modprobe -r cs46xx modprobe cs46xx /etc/rc.d/init.d/alsa start
Do note that the link to "/etc/rc.d/init.d/alsa" may have to be modified depending on where your distributions init-files are placed.
If you can't seem to use your mic with this card, open up alsamixer and set the following 3 channels to "capture": MIC, CAPTURE, ADC. Make sure your amixer output contains following:
Simple mixer control 'ADC',0 Capabilities: volume cswitch cswitch-joined Playback channels: Front Left - Front Right Capture channels: Front Left - Front Right Limits: 0 - 32767 Front Left: 32767 [100%] Capture [on] Front Right: 32767 [100%] Capture [on]
(see also: http://alsa.opensrc.org/cs46xx)
