[alsa-devel] Duplicate wake-ups in pcm_lib.c

[Colin Guthrie]

'Twas brillig, and Colin Guthrie at 20/01/10 01:24 did gyre and gimble:
> Hi,
> 
> 'Twas brillig, and Jaroslav Kysela at 18/01/10 21:39 did gyre and gimble:
>> On Mon, 18 Jan 2010, Colin Guthrie wrote:
>>> This is handled in our bug report here:
>>> https://qa.mandriva.com/show_bug.cgi?id=57010
>>>
>>> For reference relating to comment 12:
>>> 2.6.32.3-1mnb: First introduced the above 4 fixes.
>>> 2.6.32.3-2mnb: included 7b3a177
>>> 2.6.32.4-0.rc1.1mnb: included ed69c6a
>>>
>>> Is there something more that needs done?
>>
>> Thanks for feedback. Please, provide debug information:
>>
>> http://www.alsa-project.org/main/index.php/XRUN_Debug
>>
>> Use 101 or 29 values for xrun_debug and try to put ksyslog messages 
>> to a relation with the audiable problems.
> 
> Just following up on this on behalf of a colleage.
> 
> He's set the 101 value and this annoyingly seems to fix his problem
> (well, no glitches to the ear anyway!).
> 
> However he does get the following messages:
> 
> kernel: PCM: hw_ptr skipping! [Q] (pos=1024, delta=8192, period=1024,
> jdelta=0/170/0, hw_ptr=140116992/140116992)
> 
> When he does the 29 value it spams the log >one every second and he
> didn't try too long to get it to fail before he switched to 101. I can
> get the full log of the above too if it's useful or run the 29 test and
> capture the output if it'll still help even tho it's not showing the error.

Another reply on the bug with some debug output:

https://qa.mandriva.com/show_bug.cgi?id=57010#c14


hwptr log: pcmC0D0p:0: j=3421759, pos=16376/8192/16384,
hwptr=1900536/1884160
hwptr log: pcmC0D0p:0: j=3421759, pos=16376/8192/16384,
hwptr=1900536/1884160
hwptr log: pcmC0D0p:0: j=3421759, pos=16376/8192/16384,
hwptr=1900536/1884160
hwptr log: pcmC0D0p:0: j=3421759, pos=16376/8192/16384,
hwptr=1900536/1884160
hwptr log: pcmC0D0p:0: j=3421759, pos=16376/8192/16384,
hwptr=1900536/1884160
hwptr log: pcmC0D0p:0: j=3421759, pos=16376/8192/16384,
hwptr=1900536/1884160
hwptr log: pcmC0D0p:0: j=3421759, pos=0/8192/16384, hwptr=1900536/1884160
hwptr log: pcmC0D0p:0: j=3421759, pos=0/8192/16384, hwptr=1900544/1900544
hwptr log: pcmC0D0p:0: j=3421759, pos=0/8192/16384, hwptr=1900544/1900544
hwptr log: pcmC0D0p:0: j=3421759, pos=0/8192/16384, hwptr=1900544/1900544
PCM: hw_ptr skipping! [Q] (pos=0, delta=16384, period=8192,
jdelta=0/371/0, hw_ptr=1900544/1900544)
PCM: hw_ptr skipping! [Q] (pos=0, delta=16384, period=8192,
jdelta=1/371/0, hw_ptr=4882432/4882432)
PCM: hw_ptr skipping! [Q] (pos=8192, delta=16384, period=8192,
jdelta=0/371/0,hw_ptr=11395072/11395072)
PCM: hw_ptr skipping! [Q] (pos=0, delta=16384, period=8192,
jdelta=0/371/0, hw_ptr=13156352/13156352)
PCM: hw_ptr skipping! [Q] (pos=0, delta=16384, period=8192,
jdelta=0/371/0, hw_ptr=13893632/13893632)
PCM: hw_ptr skipping! [Q] (pos=8192, delta=16384, period=8192,
jdelta=0/371/0, hw_ptr=20209664/20209664)
PCM: hw_ptr skipping! [Q] (pos=8192, delta=16384, period=8192,
jdelta=0/371/0, hw_ptr=27860992/27860992)
PCM: hw_ptr skipping! [Q] (pos=0, delta=16384, period=8192,
jdelta=0/371/0, hw_ptr=28639232/28639232)


-- 

Colin Guthrie
gmane(at)colin.guthr.ie
http://colin.guthr.ie/

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