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Message-ID: <s5hwrpxnf41.wl%tiwai@suse.de>
Date: Tue, 05 Oct 2010 11:49:50 +0200
From: Takashi Iwai <tiwai@...e.de>
To: Miklos Szeredi <miklos@...redi.hu>
Cc: linux-kernel@...r.kernel.org, alsa-devel@...a-project.org
Subject: Re: [REGRESSION] no sound on T60 laptop (HDA Intel)
At Tue, 05 Oct 2010 11:25:53 +0200,
Miklos Szeredi wrote:
>
> Hi,
>
> In 2.6.36-rc* sound stopped working on my T60 (HDA Intel). Everything
> appears normal except there's no sound.
>
> Dmesg attached.
>
> ...
>
> Hmm, it appears sound is back after a suspend/resume. Strange.
I see no obvious errors related the sound there.
Did the sound come from the headphone before suspend? Thinkpad has
also thinkpad_acpi stuff, and this can control the speaker volume as
well.
And,
> [24556.438378] =======================================================
> [24556.438384] [ INFO: possible circular locking dependency detected ]
> [24556.438387] 2.6.36-rc6-00084-gc6ea21e-dirty #99
> [24556.438390] -------------------------------------------------------
> [24556.438393] sh/19063 is trying to acquire lock:
> [24556.438395] (s_active#121){++++.+}, at: [<ffffffff8111f29a>] sysfs_addrm_finish+0x31/0x5a
> [24556.438407]
> [24556.438408] but task is already holding lock:
> [24556.438410] (dbs_mutex){+.+.+.}, at: [<ffffffff8138642d>] cpufreq_governor_dbs+0x37c/0x427
> [24556.438420]
> [24556.438421] which lock already depends on the new lock.
> [24556.438422]
> [24556.438424]
> [24556.438425] the existing dependency chain (in reverse order) is:
> [24556.438427]
> [24556.438428] -> #2 (dbs_mutex){+.+.+.}:
> [24556.438433] [<ffffffff81068d6b>] __lock_acquire+0x889/0x8fa
> [24556.438440] [<ffffffff81068ecb>] lock_acquire+0xef/0x115
> [24556.438445] [<ffffffff8144a677>] mutex_lock_nested+0x4b/0x2e6
> [24556.438451] [<ffffffff81386127>] cpufreq_governor_dbs+0x76/0x427
> [24556.438456] [<ffffffff81382e16>] __cpufreq_governor+0x10b/0x14c
> [24556.438461] [<ffffffff81382f5b>] __cpufreq_set_policy+0x104/0x142
> [24556.438465] [<ffffffff81384a51>] store_scaling_governor+0x190/0x1ca
> [24556.438470] [<ffffffff81383f4f>] store+0x56/0x79
> [24556.438474] [<ffffffff8111dc22>] sysfs_write_file+0x103/0x13f
> [24556.438480] [<ffffffff810ccfe6>] vfs_write+0xae/0x136
> [24556.438487] [<ffffffff810cd127>] sys_write+0x45/0x6c
> [24556.438491] [<ffffffff8100202b>] system_call_fastpath+0x16/0x1b
> [24556.438497]
> [24556.438498] -> #1 (&per_cpu(cpu_policy_rwsem, cpu)){+++++.}:
> [24556.438503] [<ffffffff81068d6b>] __lock_acquire+0x889/0x8fa
> [24556.438508] [<ffffffff81068ecb>] lock_acquire+0xef/0x115
> [24556.438512] [<ffffffff8144ab7f>] down_write+0x2c/0x4f
> [24556.438517] [<ffffffff81382c80>] lock_policy_rwsem_write+0x4a/0x7a
> [24556.438522] [<ffffffff81383f32>] store+0x39/0x79
> [24556.438526] [<ffffffff8111dc22>] sysfs_write_file+0x103/0x13f
> [24556.438531] [<ffffffff810ccfe6>] vfs_write+0xae/0x136
> [24556.438536] [<ffffffff810cd127>] sys_write+0x45/0x6c
> [24556.438540] [<ffffffff8100202b>] system_call_fastpath+0x16/0x1b
> [24556.438545]
> [24556.438546] -> #0 (s_active#121){++++.+}:
> [24556.438552] [<ffffffff81067ee6>] validate_chain+0x727/0xd23
> [24556.438557] [<ffffffff81068d6b>] __lock_acquire+0x889/0x8fa
> [24556.438561] [<ffffffff81068ecb>] lock_acquire+0xef/0x115
> [24556.438566] [<ffffffff8111e87e>] sysfs_deactivate+0x8e/0xcb
> [24556.438571] [<ffffffff8111f29a>] sysfs_addrm_finish+0x31/0x5a
> [24556.438575] [<ffffffff8111d236>] sysfs_hash_and_remove+0x54/0x78
> [24556.438580] [<ffffffff8112074c>] sysfs_remove_group+0x90/0xc9
> [24556.438584] [<ffffffff81386441>] cpufreq_governor_dbs+0x390/0x427
> [24556.438589] [<ffffffff81382e16>] __cpufreq_governor+0x10b/0x14c
> [24556.438594] [<ffffffff81382f45>] __cpufreq_set_policy+0xee/0x142
> [24556.438599] [<ffffffff81384a51>] store_scaling_governor+0x190/0x1ca
> [24556.438604] [<ffffffff81383f4f>] store+0x56/0x79
> [24556.438608] [<ffffffff8111dc22>] sysfs_write_file+0x103/0x13f
> [24556.438613] [<ffffffff810ccfe6>] vfs_write+0xae/0x136
> [24556.438617] [<ffffffff810cd127>] sys_write+0x45/0x6c
> [24556.438622] [<ffffffff8100202b>] system_call_fastpath+0x16/0x1b
> [24556.438627]
> [24556.438628] other info that might help us debug this:
> [24556.438629]
> [24556.438632] 4 locks held by sh/19063:
> [24556.438634] #0: (&buffer->mutex){+.+.+.}, at: [<ffffffff8111db56>] sysfs_write_file+0x37/0x13f
> [24556.438642] #1: (s_active#120){.+.+.+}, at: [<ffffffff8111dc01>] sysfs_write_file+0xe2/0x13f
> [24556.438651] #2: (&per_cpu(cpu_policy_rwsem, cpu)){+++++.}, at: [<ffffffff81382c80>] lock_policy_rwsem_write+0x4a/0x7a
> [24556.438659] #3: (dbs_mutex){+.+.+.}, at: [<ffffffff8138642d>] cpufreq_governor_dbs+0x37c/0x427
> [24556.438667]
> [24556.438667] stack backtrace:
> [24556.438671] Pid: 19063, comm: sh Not tainted 2.6.36-rc6-00084-gc6ea21e-dirty #99
> [24556.438674] Call Trace:
> [24556.438679] [<ffffffff810670c3>] print_circular_bug+0xae/0xbd
> [24556.438684] [<ffffffff81067ee6>] validate_chain+0x727/0xd23
> [24556.438689] [<ffffffff81068d6b>] __lock_acquire+0x889/0x8fa
> [24556.438694] [<ffffffff81066798>] ? mark_held_locks+0x52/0x70
> [24556.438699] [<ffffffff81065450>] ? lockdep_init_map+0x9b/0x4fb
> [24556.438703] [<ffffffff8111f29a>] ? sysfs_addrm_finish+0x31/0x5a
> [24556.438707] [<ffffffff81068ecb>] lock_acquire+0xef/0x115
> [24556.438711] [<ffffffff8111f29a>] ? sysfs_addrm_finish+0x31/0x5a
> [24556.438716] [<ffffffff8111e87e>] sysfs_deactivate+0x8e/0xcb
> [24556.438720] [<ffffffff8111f29a>] ? sysfs_addrm_finish+0x31/0x5a
> [24556.438725] [<ffffffff8111f29a>] sysfs_addrm_finish+0x31/0x5a
> [24556.438730] [<ffffffff8111d236>] sysfs_hash_and_remove+0x54/0x78
> [24556.438734] [<ffffffff8112074c>] sysfs_remove_group+0x90/0xc9
> [24556.438739] [<ffffffff81386441>] cpufreq_governor_dbs+0x390/0x427
> [24556.438744] [<ffffffff81382e16>] __cpufreq_governor+0x10b/0x14c
> [24556.438749] [<ffffffff81382f45>] __cpufreq_set_policy+0xee/0x142
> [24556.438754] [<ffffffff81384a51>] store_scaling_governor+0x190/0x1ca
> [24556.438758] [<ffffffff81384874>] ? handle_update+0x0/0xe
> [24556.438763] [<ffffffff81383f4f>] store+0x56/0x79
> [24556.438768] [<ffffffff8111dc22>] sysfs_write_file+0x103/0x13f
> [24556.438773] [<ffffffff810ccfe6>] vfs_write+0xae/0x136
> [24556.438777] [<ffffffff810cd127>] sys_write+0x45/0x6c
> [24556.438782] [<ffffffff8100202b>] system_call_fastpath+0x16/0x1b
These look a bit scary...
In anyway, if this is reproducible, get alsa-info.sh output before and
after suspend. It'll give more information of HD-audio and sound
driver status.
Takashi
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