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[regression] Sound not transferred to docking station after resume from StR

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From: Frans Pop
Subject: [regression] Sound not transferred to docking station after resume from StR
Date: Friday, April 16, 2010 - 12:31 pm

Scenario:
- suspend laptop while *un*docked, i.e. with laptop speakers in use
- dock laptop
- resume

With 2.6.33 and earlier the sound would always come from the external 
speakers connected to the docking station. But with 2.6.34-rc4 I get sound 
still coming from the laptop's internal speakers, which is not correct.

System: HP 2510p running Debian stable ("Lenny")
Sound driver: snd_hda_intel; codec: AD1981

Attached my kernel config for .34, and dmesg output for both .33 and .34 
showing:
- boot (docked)
- undocking (visible as several USB disconnects)
- suspend
- resume after docking

I don't see any significant changes in dmesg output during resume.

I'll do a bisect, unless someone has some idea what may be causing this.
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Messages in current thread:
[regression] Sound not transferred to docking station afte ..., Frans Pop, (Fri Apr 16, 12:31 pm)
Re: [regression] Sound not transferred to docking station ..., Frans Pop, (Fri Apr 16, 12:48 pm)
Re: [regression] Sound not transferred to docking station ..., Frans Pop, (Sat Apr 17, 2:06 am)
Re: [regression] Sound not transferred to docking station ..., Takashi Iwai, (Mon Apr 19, 12:47 am)
Re: [regression] Sound not transferred to docking station ..., Frans Pop, (Mon Apr 19, 4:38 am)
Re: [regression] Sound not transferred to docking station ..., Takashi Iwai, (Mon Apr 19, 4:59 am)
Re: [regression] Sound not transferred to docking station ..., Takashi Iwai, (Mon Apr 19, 5:14 am)
Re: [regression] Sound not transferred to docking station ..., Frans Pop, (Mon Apr 19, 5:18 am)
Re: [regression] Sound not transferred to docking station ..., Frans Pop, (Mon Apr 19, 5:39 am)
Re: [regression] Sound not transferred to docking station ..., Takashi Iwai, (Mon Apr 19, 5:53 am)
Re: [regression] Sound not transferred to docking station ..., Frans Pop, (Mon Apr 19, 7:58 am)
Re: [regression] Sound not transferred to docking station ..., Takashi Iwai, (Mon Apr 19, 9:17 am)