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SubjectRe: 2.6.0-test9-mm2

Daniel Drake wrote:

> I've been getting a couple of audio skips with 2.6.0-test9-mm2.
> Haven't heard a skip since test4 or so, so I'm assuming this is a
> result of the IO scheduler tweaks.
> Here's how I can produce a skip:
> Running X, general usage (e.g. couple of xterms, an emacs, maybe a
> mozilla-thunderbird)
> I switch to the first virtual console with Ctrl+Alt+F1. I then switch
> back to X with Alt+F7. As X is redrawing the screen, the audio skips
> once.
> This happens most of the time, but its easier to reproduce when i am
> compiling something, and also when I cycle through the virtual
> consoles before switching back to X.

Unlikely to be an IO scheduler change.

Switching from X to console or back can cause high CPU scheduling
latencies. I haven't tried to discover why.

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