Installed Win 7 on my new 21.5" iMac. Everything has worked flawlessly except no audio. When I run diagnostics on the audio under Win 7, it says "there is a problem with the driver for Cirrus Logic CS4206A (AB 78). Reinstalling the driver might fix the problem".
I have reinstalled it but that doesn't help. Any suggestions?
Originally thought experiencing the same issue, but I got following strange behavior. Be free to verify at your end.
I tried several things, Win 7 problem solve, driver re-install, delete devices in device manager (in HM-Audio) AND device driver. As well as it is fresh install a number of updates to Win 7 happend. At least after all these tries I got following behavior:
When device is showing issues in device manager and sound symbol in task bar is crossed out I shutdown!!!! windows. When I switch the iMac on the system comes up with proper working drivers. Shutdown again next start failing device. Shutdown again system comes up with sound. This is reproducible at my end.
Just restart fails.
I have no clue what could cause this behavior.
I tried to find newer drivers. Cirrus Logic didn't offer for this chipset, only stating vendor/integrator is responsible for driver. I only found one gaming site offering a driver, but this is exactly the same version installed by bootcamp.
Maybe that could help to get closer to the issue.
One thing you can try is to go into the sound driver in Device Manager and tell it to roll back the driver to a previous version. I had this problem on my 21.5" and the default driver worked fine in Win7 and then got cranky when Bootcamp loaded the Cirrus Logic driver. As I recall that solved it for me but sorry, can't test now as I've upgraded to the i5 quad which is a different motherboard. Cheers!
Quick update - I am currently migrating devices and software step by step from my old PC. Yesterday evening I installed my colorimeter and a garmin device. After this installation my sound problem disappear. My sound is now stable even for a resstart, energy saving, hibernate.
I didn't check the rear jacks for ear phones and microphone so far.
I had the same, sometimes sound, sometimes not issue. As well, the headphone jack would not cut out the internal speakers. I had tried the modified Macbook drivers found here:
http://www.stuffedcow.net/macbook_audio
This did not solve the issue, but when I went into the device driver and got windows to update it from the internet, it seems to work correctly now.
Yes, disabling the Cirrus device and then enabling it will work. However, if you also have enabled "High Definition Audio Device" under Sound, video and game controllers, you should diabled it and not enable it. It seems that it cause problems with cirrus drivers.
How exactly does this work? I'm new using Windows (got old XP SP2) and really just installed it to play a game. I've got no sound at all. Had it briefly after I installed the drivers for the first time, but only for sounds on windows itself (no audio streaming through the internet, etc.). Now, I don't have ANY sound at all. I reinstalled drivers, etc. And what you guys are saying about enabling/disabling devices and changing from High Definition Audio Device sounds like it might fix my problem... Unfortunately I'm windows illiterate.
Would appreciate it if anyone can send word on how to do these steps.
