[Bug 246496] [NEW] [Hardy] Several artsd competing for 100% CPU

[Swâmi Petaramesh]

Public bug reported:

Binary package hint: arts

This happens on an Acer Aspire 3104 WLMi after upgrading from Gutsy to
Hardy (problem didn't exist in Gutsy) and has persisted thru all Hardy
updates so far.

At KDE session startup, not always but very often, and especially when
restoring at the same time a number of windows that would each produce a
little sound when opening, the system shows dreadfully slow and produces
no sound. It remains in this state of "dreadful slowness" indefinitely.

"top" then shows that several artsd processes (typically 2 or 3) are
running and competing for eating 100% CPU.

Issuing "killall -KILL artsd" (-TERM doesn't help) kills all mad artsd
processes and :

- The system suddenly issues a cascade of sounds that seems to have been waiting, queued or whatever.
- After that a single artsd process is running, behaving OK and sound works.

Loaded sound modules are :

snd_hda_intel         344728  1
snd_pcm_oss            42144  0
snd_mixer_oss          17920  1 snd_pcm_oss
snd_pcm                78596  2 snd_hda_intel,snd_pcm_oss
snd_page_alloc         11400  2 snd_hda_intel,snd_pcm
snd_hwdep              10500  1 snd_hda_intel
snd_seq_dummy           4868  0
snd_seq_oss            35584  0
snd_seq_midi            9376  0
snd_rawmidi            25760  1 snd_seq_midi
snd_seq_midi_event      8320  2 snd_seq_oss,snd_seq_midi
snd_seq                54224  6 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_seq_midi_event
snd_timer              24836  2 snd_pcm,snd_seq
snd_seq_device          9612  5 snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_rawmidi,snd_seq
pcspkr                  4224  0
snd                    56996  13 snd_hda_intel,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_hwdep,snd_seq_dummy,snd_seq_oss,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
soundcore               8800  1 snd


Sound hardware (per lshw) is :

description: Audio device
product: IXP SB4x0 High Definition Audio Controller
vendor: ATI Technologies Inc
physical id: 14.2
bus info: pci at 0000:00:14.2
version: 01
width: 64 bits
clock: 33MHz
capabilities: pm msi bus_master cap_list
configuration: driver=HDA Intel latency=64 module=snd_hda_intel

Any clue ?

** Affects: arts (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: arts hardy

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[Hardy] Several artsd competing for 100% CPU
https://bugs.launchpad.net/bugs/246496
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