Thanks for the reply. This change is happening all the time regardless of if I have anything plugged in or not. I'm willing to accept that I might have a hardware problem. I don't currently have a working windows to try it out under a different OS. Is there a way I could debug this issue further, e.g., could I somehow check the jack detection? Could I see the hardware events in some log? What driver (kernel module?) is responsible for producing those events? Would it be possible to try another driver? Here's what hardware lister says I have: product: 6 Series/C200 Series Chipset Family High Definition Audio Controller [8086:1C20] vendor: Intel Corporation [8086] bus info: pci at 0000:00:1b.0 version: 05 width: 64 bits clock: 33MHz capabilities: Power Management, Message Signalled Interrupts, PCI Express, bus mastering, PCI capabilities listing configuration: driver: HDA Intel latency: 0 resources: irq: 66 memory: f6620000-f6623fff Thanks. On Fri, Dec 2, 2011 at 2:20 AM, David Henningsson < david.henningsson at canonical.com> wrote: > On 12/02/2011 04:54 AM, Tony Bernardin wrote: > >> Sorry if I'm posting this question in the wrong list. I've been trying >> to search for this issue, but have been unsuccessful so far with not >> even a hint at what I could try to get to the bottom of this. I'm not >> very familiar with the sound system. >> >> The symptom: regular hiccup in the sound output. >> >> What I've found: >> launching the pulseaudio daemon with -v showed that it is constantly >> changing the port of the sync: >> > > Changing port when you plug something in/out is a part of my jack > detection patches, and implemented in Ubuntu 11.10. > > Is it changing even though you're not actually plugging headphones in and > out repeatedly? If so, I suspect that your hardware might be broken. > > -- > David Henningsson, Canonical Ltd. > http://launchpad.net/~diwic > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.freedesktop.org/archives/pulseaudio-discuss/attachments/20111203/e2cef414/attachment-0001.htm>