[linux-audio-user] clicks with video activity

[Hector Centeno]

Hello,

I'm getting clicks in the audio using jack when there is video activity
(i.e. audio software that displays meters like Rezound, when muse
refreshes the display at playing and following the cursor, when
minimizing and maximizing windows, etc). If I increase the latency they
seem to stop. What could be causing this? Here there are some details of
my system:

Asus P4P800Deluxe
Pentium 4HT 2.8 ghz
1 gig ram
M-Audio Audiophile
Agnula Linux with kernel 2.6.12 (with preemption)

This is my cat /proc/interrupts

hector at demudi:~$ cat /proc/interrupts
CPU0
0: 3167206 IO-APIC-edge timer 0/67206
1: 601 IO-APIC-edge i8042 0/601
7: 0 IO-APIC-edge parport0 0/0
9: 0 IO-APIC-level acpi 0/0
14: 20770 IO-APIC-edge ide0 0/20769
15: 43 IO-APIC-edge ide1 0/41
177: 187389 IO-APIC-level uhci_hcd:usb1, radeon at pci:0000:01:00.0
0/87389185: 205449 IO-APIC-level uhci_hcd:usb2 0/5449
193: 3 IO-APIC-level ehci_hcd:usb3 0/3
201: 21466 IO-APIC-level Intel ICH5 0/21466
209: 3 IO-APIC-level ohci1394 0/3
217: 35511 IO-APIC-level SysKonnect SK-98xx 0/35511
225: 1696593 IO-APIC-level ICE1712 0/96593
NMI: 0
LOC: 3167251
ERR: 0
MIS: 0

I have jack set to 128 frames, 2 periods and 44100 sample rate.
The video card is a Radeon 7000.

As you can see my audio card is in the last IRQ (225: 1696593
IO-APIC-level ICE1712 0/96593) so I was wondering if this is the
cause. I tried to set a higher priority using chrt -f -p 99 `pidof "IRQ
225"` but it didn't fix anything.
I remember having the same problem long time ago in windows when I had
an Intel motherboard and I was using the built-in video card. The
problem disappeared when I installed a new AGP card.

Thank you!


Hector