[mythtv-users] Latest CVS -> audio buffer overflows

[Anders Hanson]

Hi,

Glad to here that I could help.

Here is a brief  writeup how I figured out that it was an irq conflict.

My problem was not just with MythTV, I had the problem with all programs 
that used ALSA:
When running xmms I got an error in /var/lob/kern.log (or dmesg). I 
can't remember the exact line but
it had alsa and input/output error  in it. I did a quick search on 
Internet on the line "alsa input/output error"
and soon find out that it probably was an irq conflicts.

I alsa found and old dmesg log that was from an old installation of my 
mythtv box where everything worked.
The only difference between the two dmesg logs was the ACPI stuff. It 
was missing from the new one. I then
remembered that I had done some changes in the BIOS and when looking for 
any ACPI in there and soon
found that I had disabled ACPI for some reason.


Anders

Paul Woodward wrote:

>Hi Anders,
>
>How did you know it was an IRQ problem?
>
>I had ACPI enabled in the kernel, on in the BIOS (Abit IS-7) previously.
>To fix the problem, I disabled as many of the on-board devices as I
>could (onboard sound, serial, IR etc.) and now it works fine.
>
>It might be useful to know what changes to the myth code caused these
>problems...
>
>Thanks, Paul
>
>-----Original Message-----
>From: mythtv-users-bounces at mythtv.org
>[mailto:mythtv-users-bounces at mythtv.org] On Behalf Of Anders Hanson
>Sent: 24 July 2004 02:41
>To: Discussion about mythtv
>Subject: Re: [mythtv-users] Latest CVS -> audio buffer overflows
>
>I had that problem last night!
>
>In my case it was problem with irq collition, fixed by enableing ACPI in
>
>both kernel and BIOS.
>
>Using MythTV and ALSA from cvs with kernel 2.6.7
>
>/Anders
>
>Paul Woodward wrote:
>
>  
>
>>That sounds exactly like my problem. Good to know I'm not the only one.
>>
>>Paul
>>
>>-----Original Message-----
>>From: mythtv-users-bounces at mythtv.org
>>[mailto:mythtv-users-bounces at mythtv.org] On Behalf Of David George
>>Sent: 23 July 2004 22:02
>>To: Discussion about mythtv
>>Subject: Re: [mythtv-users] Latest CVS -> audio buffer overflows
>>
>>Paul Woodward wrote:
>>
>> 
>>
>>    
>>
>>>Hi All,
>>>
>>>I've just tried upgrading from 0.15.1 (worked fine) to the latest CVS.
>>>   
>>>
>>>      
>>>
>> 
>>
>>    
>>
>>>I am experiencing continuous audio buffer overflow errors when 
>>>watching any TV channel or recorded program. I am using an ALSA plug 
>>>for sound output to the digital out on my M-Audio Revolution 7.1.
>>>
>>>   
>>>
>>>      
>>>
>>Do you mean this message "Audio buffer overflow, audio data lost!"?
>>    
>>
>Just
>  
>
>>as a pointer, when reporting errors it is very helpful to give the
>>    
>>
>exact
>  
>
>>message.
>>
>> 
>>
>>    
>>
>>>Has anyone got any ideas what could be the cause?
>>>
>>>   
>>>
>>>      
>>>
>>I am also getting these with CVS as of last night. Using kernel 2.6.7 
>>with alsa 1.0.3. I have added additional debugging and found in my case
>>    
>>
>
>  
>
>>that Myth is constantly waiting for space on my soundcard. According to
>>    
>>
>
>  
>
>>what I found Myth wants 4096 bytes and my sound card is only reporting 
>>128 free. However mplayer and aplay work fine on this system. Using 
>>mplayer-1.0-0.10.pre5.1.fc2.fr I can even directly play the .nuv files 
>>with no problems.
>>
>>I am looking into this and will post to the list as soon as I find out 
>>what the problem is on my system. Unless, of course, someone beats me
>>    
>>
>to
>  
>
>>it.
>>
>>David
>>
>>
>>---
>>
>>Checked by AVG anti-virus system (http://www.grisoft.com).
>>Version: 6.0.723 / Virus Database: 479 - Release Date: 19/07/2004
>>
>> 
>>
>> 
>>
>>-----------------------------------------------------------------------
>>    
>>
>-
>  
>
>>_______________________________________________
>>mythtv-users mailing list
>>mythtv-users at mythtv.org
>>http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>> 
>>
>>    
>>
>
>
>---
>
>Checked by AVG anti-virus system (http://www.grisoft.com).
>Version: 6.0.726 / Virus Database: 481 - Release Date: 22/07/2004
> 
>  
>
>  
>
>------------------------------------------------------------------------
>
>_______________________________________________
>mythtv-users mailing list
>mythtv-users at mythtv.org
>http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>  
>