Horrific jackd xrun behaviour after upgrade from US 10.04 to 12.04 (Re: R: Audio issues in 10.04)

[Ralf Mardorf]

On Tue, 2012-09-18 at 11:39 +0200, Thomas Orgis wrote:
> rtirq:
> 
>   PID CLS RTPRIO  NI PRI %CPU STAT COMMAND      
>   302 FF      90   - 130  0.6 S    irq/18-firewire      
>   994 FF      83   - 123  0.0 S    irq/16-snd_hda_      
>    84 FF      80   - 120  0.0 S    irq/17-ehci_hcd      
>    88 FF      80   - 120  0.0 S    irq/16-ohci_hcd      
>    86 FF      79   - 119  0.0 S    irq/19-ehci_hcd      
>    90 FF      79   - 119  0.0 S    irq/16-ohci_hcd      
>    99 FF      75   - 115  0.0 S    irq/1-i8042  
>    98 FF      74   - 114  0.1 S    irq/12-i8042 
>    23 FF      50   -  90  0.0 S    irq/9-acpi   
>    73 FF      50   -  90  0.4 S    irq/22-ahci  
>    92 FF      50   -  90  0.1 S    irq/18-ohci_hcd      
>    94 FF      50   -  90  0.1 S    irq/18-ohci_hcd      
>    96 FF      50   -  90  0.1 S    irq/18-ohci_hcd      
>   100 FF      50   -  90  0.0 S    irq/8-rtc0   
>   287 FF      50   -  90  0.0 S    irq/14-pata_ati      
>   288 FF      50   -  90  0.0 S    irq/15-pata_ati      
>   295 FF      50   -  90  0.1 S    irq/18-radeon        
>   965 FF      50   -  90  0.0 S    irq/7-parport0       
>  1212 FF      50   -  90  0.0 S    irq/42-eth3  
>     3 TS       -   0  19  1.0 R    ksoftirqd/0  
>     9 TS       -   0  19  1.0 S    ksoftirqd/1  
>    13 TS       -   0  19  1.0 S    ksoftirqd/2

I'm short in time and can't read your email right now, so I only take a
look at the output of rtirq status.
Usually you can't do anything against the shared IRQ, however it's ok,
since firewire and snd_hda are head of the IRQs. But the first IRQ,
before firewire has to be the timer rtc0.

Change the config to
RTIRQ_NAME_LIST="rtc [and add anything as it was before, excepted of a second rtc entry]"

Hth,
Ralf