Takashi Iwai tiwai@suse.de писал(а) в своём письме Mon, 20 Aug 2012 23:21:31 +0700:
[Re-added Cc to ML; please don't drop it]
At Mon, 20 Aug 2012 22:23:02 +0700, ValdikSS wrote:
Takashi Iwai tiwai@suse.de писал(а) в своём письме Mon, 20 Aug 2012 16:17:04 +0700:
At Sat, 18 Aug 2012 12:44:29 +0700, ValdikSS wrote:
Hello! I have a Lenovo ThinkPad X220 laptop with a conexant codec and
recently
(after kernel 3.5.2) it is active all the time after KDE login, as powertop says. This couldn't be fixed by logging of from KDE or
playing
some music in mplayer from console. The only kernel I tried in 3.5.x
is
3.5.2, so I can't say is this bug reproducible in 3.5.0 or 3.5.1, but everything is fine with 3.4.9. This never happens if you don't start
KDE
after reboot, you can listen to some music in mplayer in console and everything seems to be fine. lsof and fuser /dev/snd/* shows nothing.
Just to be sure, check /sys/module/snd_hda_intel/parameters/power_save value after logging into KDE. This value can be changed dynamically.
If the value is still set properly, try to build the kernel with the tracing option with the patch below. Then try to trace the power up/down sequences in the tracing buffer. Some brief description is found in Documentation/sound/alsa/HD-Audio.txt Tracepoints section.
thanks,
Takashi
From: Takashi Iwai tiwai@suse.de Subject: [PATCH] ALSA: hda - Add tracepoints at snd_hda_power_up/down entrances.
Signed-off-by: Takashi Iwai tiwai@suse.de
sound/pci/hda/hda_codec.c | 2 ++ sound/pci/hda/hda_trace.h | 24 ++++++++++++++++++++++++ 2 files changed, 26 insertions(+)
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index 408babc..ad0101e 100644 --- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -4417,6 +4417,7 @@ static void __snd_hda_power_up(struct hda_codec *codec, bool wait_power_down) spin_lock(&codec->power_lock); codec->power_count++;
- trace_hda_power_count(codec); /* Return if power_on or transitioning to power_on, unless currently
if ((codec->power_on || codec->power_transition > 0) &&
- powering down. */
@@ -4496,6 +4497,7 @@ void snd_hda_power_down(struct hda_codec *codec) { spin_lock(&codec->power_lock); --codec->power_count;
- trace_hda_power_count(codec); if (!codec->power_on || codec->power_count ||
codec->power_transition)
{ spin_unlock(&codec->power_lock); return; diff --git a/sound/pci/hda/hda_trace.h b/sound/pci/hda/hda_trace.h index 9884871..9a34b86 100644 --- a/sound/pci/hda/hda_trace.h +++ b/sound/pci/hda/hda_trace.h @@ -87,6 +87,30 @@ DEFINE_EVENT(hda_power, hda_power_up, TP_ARGS(codec) ); +TRACE_EVENT(hda_power_count,
- TP_PROTO(struct hda_codec *codec),
- TP_ARGS(codec),
- TP_STRUCT__entry(
__field( unsigned int, card )__field( unsigned int, addr )__field( int, power_count )__field( int, power_on )__field( int, power_transition )- ),
- TP_fast_assign(
__entry->card = (codec)->bus->card->number;__entry->addr = (codec)->addr;__entry->power_count = (codec)->power_count;__entry->power_on = (codec)->power_on;__entry->power_transition = (codec)->power_transition;- ),
- TP_printk("[%d:%d] power_count=%d, power_on=%d,
power_transition=%d",
__entry->card, __entry->addr, __entry->power_count,__entry->power_on, __entry->power_transition)+);
TRACE_EVENT(hda_unsol_event, TP_PROTO(struct hda_bus *bus, u32 res, u32 res_ex),
Thanks for the quick reply! I compiled 3.5.2 kernel with this patch, enabled hda tracing, ran mplayer once in the console and started KDE. Once KDE is started, card is used 100% of time, which can be seen in powertop. When I logout from KDE and kill kdm, no events are generated in trace since KDE start (no sounds are played from KDE start till KDM kill) and card is still used 100% of time. If you play any sounds in mplayer in console after kdm kill, the card is still used 100% time. This can be fixed by laptop suspend.
The traces are quite huge so I pasted it to pastebin: 01-trace-just-enabled http://pastebin.com/JNRWXUPy 02-mplayer-played-and-stopped-card-is-normal http://pastebin.com/r0jZLDey 03-kde-started-and-stopped-100-percent-card http://pastebin.com/Z7mzbY4c The last log begins with latest rows from 02
It's still not clear from the log. You can reduce the trace pattern to hda_power_* for reducing the trace log size.
In anyway, could you try the patch below?
thanks,
Takashi
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index 88a9c20..b94e04d 100644 --- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -4433,6 +4433,8 @@ static void __snd_hda_power_up(struct hda_codec *codec, bool wait_power_down) * then there is no need to go through power up here. */ if (codec->power_on) {
if (codec->power_transition < 0)codec->power_transition = 0;
Yes, thanks, this patch fixes this bug.