compiz interferes with jackd realtime audio playback

[Vivian Stewart]

Binary package hint: compiz

this happens with both ATI and NVIDIA graphics cards and only started happening just recently. when I'm recording or playing back multitrack audio in ardour minimize, maximize, open, close of a window for instance will cause xruns. my realtime session in jackd has priority of 70-80 so....? my system has all the usually tweaks for realtime audio i.e the linux-rt kernel, /etc/udev/40-permissions... and /etc/security/limits.comf edits. this was fine what happened?

[Martin Pitt (pitti)]

We need some further details. Which Ubuntu release are you using? You said it started "recently", what changed at this time? Are you using proposed updates? Did you recently change your graphics driver? Did you try this on multiple machines (since you mentioned both ATI and nvidia)?

This is neither a compiz nor a jockey problem, might be a regression in the new kernel or a new nvidia driver.

[Vivian Stewart (vivichrist)]

this is using hardy updated from gutsy and feisty. I recently changed the graphics card from a gforce 7900gs to radeon 1600 pro pci-express and before that I upgraded to a MA790X-DS4 motherboard, phenom 9550 CPU from DFI lanparty NF4-ultra Socket 939 CPU. in both cases, before and after the change in graphics card, this bug happened. but before I changed motherboard I had a different problem where jackd kept dyeing. no proposed updates are not enabled since they made my system unstable (surprise surprise). my laptop (hpcompaqv6001au) has Ibex ... haven't tested that yet. the previous problem to this one I solved on my laptop by updating to Ibex. and yes from nvidia to fglrx with no change in the bug. I have the standard restricted drivers installed (no envy or compiled).

[Vivian Stewart (vivichrist)]

after I upgraded the motherboard jackd&ardour worked as expected for while ...can't remember which update it was. sorry. but it is instantly reproducible. I'll have a look in the xorg.log.

[Vivian Stewart (vivichrist)]

actually after some testing this only happens with the use of firewire (freebob) audio.

[kernel-janitor (kernel-janitor)]

Hi vivichrist,

This bug was reported a while ago and there hasn't been any activity in it recently. We were wondering if this is still an issue? Can you try with the latest development release of Ubuntu? ISO CD images are available from http://cdimage.ubuntu.com/releases/karmic .

If it remains an issue, could you run the following command from a Terminal (Applications->Accessories->Terminal). It will automatically gather and attach updated debug information to this report.

apport-collect -p linux 279984

Also, if you could test the latest upstream kernel available that would be great. It will allow additional upstream developers to examine the issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Once you've tested the upstream kernel, please remove the 'needs-upstream-testing' tag. This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs-upstream-testing' text. Please let us know your results.

Thanks in advance.

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