linux-kernel - Re: [BUG] 3.10 regression: hang on suspend

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Message-ID: <20130716065626.GA1587@redhat.com>
Date:	Tue, 16 Jul 2013 08:56:27 +0200
From:	Stanislaw Gruszka <sgruszka@...hat.com>
To:	Ortwin Glück <odi@....ch>
Cc:	linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org
Subject: Re: [BUG] 3.10 regression: hang on suspend

Hi

On Mon, Jul 15, 2013 at 09:40:13PM +0200, Ortwin Glück wrote:
> My Samsung ultrabook hangs when suspending to RAM since this commit
> (bisected). Disabling wifi before suspend works around the issue.
> All works fine with 3.9.y.
> 
> 12e7f517029dad819c45eca9ca01fdb9ba57616b
> 
> Author: Stanislaw Gruszka <sgruszka@...hat.com>
> 
> Date:   Thu Feb 28 10:55:26 2013 +0100
> 
>     mac80211: cleanup generic suspend/resume procedures
> 
>     Since now we disconnect before suspend, various code which save
>     connection state can now be removed from suspend and resume
>     procedure. Cleanup on resume side is smaller as ieee80211_reconfig()
>     is also used for H/W restart.
> 
>     Signed-off-by: Stanislaw Gruszka <sgruszka@...hat.com>
>     Signed-off-by: Johannes Berg <johannes.berg@...el.com>

Apparently this commit changed suspend procedure on mac80211, but it's
not obvious for me why it hangs :-(

What is your user space configuration (are you using NM or other
software or maybe just wpa_supplicant)? Are you using wowlan?
If you do add no_console_suspend boot parameter does it print some
diagnostic messages during suspend before the hang ?

Thanks
Stanislaw

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