#1772 HIGH Trial-2: Audio driver doesn't survive rmmod && modprobe.

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#1772: Audio driver doesn't survive rmmod && modprobe.
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  Reporter:  cjb     |       Owner:  cjb    
      Type:  defect  |      Status:  new    
  Priority:  high    |   Milestone:  Trial-2
 Component:  kernel  |     Version:         
Resolution:          |    Keywords:  power  
  Verified:  0       |  
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Comment (by jayakumar):

 The 0x7e id reg readback failure is a known issue:
 [   22.583429] Failure reading codec reg 0x7e,Last value=0x7e805368
 [   22.583614] Failure reading codec reg 0x7e,Last value=0x7e805368

 This error has been consistent since A-test. This doesn't happen with the
 other registers or the other realtek codecs that I've tested with, and I'm
 told also not with Wolfson codecs. Luckily though, the last value that the
 codec asserts is the correct value. The 0x5368 correctly identifies the
 codec as AD1888 although for some reason, the complete signal never
 asserts. I think it would be useful to scope the AC97 bus to identify why
 that's the case or ask ADI support about it.

 The modprobe issue is new to me.

 [  120.740739] Failure reading codec reg 0x7c,Last value=0x72800000

 It seems similar to #1264. Needs some looking into.

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Ticket URL: <http://dev.laptop.org/ticket/1772#comment:2>
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