Jonathan Leonard wrote: > Hi, I have noticed with beta 3 that sometimes I get Xruns with very > large values. I have researched the internet and this symptom can be > found since 2006 but is still occurring in some Ubuntu and Studio > systems, and also even posted in the 64studio forum without any useful > response anywhere including the internet. I found one post in a kernel > archive from a long time ago that was the typical 'we patched this a > long time ago' but also contained mention of jack getting 2 different > timers. The first 2 digits are almost always 12.....with the remaining > ones varying. The VERY LARGE Async XRUN is audible and happens with > wined apps and a native one like Renoise 2. > > What timer does 64STV3b3 supposed to use to time stamp events? Is it > RTC or something else? How can I check that? Could any settings for > the clock vs the hardware clock on the mobo cause this?
Presumably the HPET if your system was made in last 5 years. Of course if you are using any non-standard boot parameters (like noapic) then you will also have problems. > > I am using RME hardware currently and I am pretty sure I have seen this Which device are you using? I have an RME 9652 that seems to be working fine. Also, what are the specs of your computer? Perhaps the output from /proc/interrupts would be useful if yours is an older PC. 3rd party kernel modules may be causing you problems as well, are you using either the fglrx (old ati 3d) or nvidia drivers? Perhaps you have other 3rd party modules installed (eg. vmware)? > with both the multimedia and RT kernel. Certainly the RT... > Xruns are to be expected with the non-RT kernel if you are using the same settings. You need to be far less aggressive with periods and buffers than you would be with an RT kernel. Perhaps your settings are also too aggressive for either kernel? There is virtually no info in your original post. Any relevant details that you could provide would be helpful. Hth,
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