I think I have found a workaround, by setting nohz=off. Will test more with the recording functionality of my card later, but so far have been unable to reproduce crackles (which happen constantly in all other settings tried).
I think this a manifestation of this kernel bug: https://bugzilla.kernel.org/show_bug.cgi?id=14426 I also see CE: hpet increasing min_delta_ns messages, but I haven't seen them higher than 22500. Until now I haven't really been looking for them, but will leave system on with nohz enabled to see if they stack up. hpet=disable, and likewise acpi=off, greatly reduces the volume and consistency of crackles, but they are still there. Are there any suggestions you have for identifying the bug? Should this bug be closed in favor of a bug against kernel? I will test a bit more in the coming days to see if I can repro with nohz=off. ** Bug watch added: Linux Kernel Bug Tracker #14426 http://bugzilla.kernel.org/show_bug.cgi?id=14426 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/814426 Title: Natty Narwhal Crackling Sound To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/814426/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
