Ok I have tried out cyclictest, here are the results. I used the version from the repositories, run with the command:
sudo time cyclictest --histogram=1000000 > histogram.txt Prior to starting cyclictest, I opened the log file viewer and went to the end of the "messages". Then I started cyclictest, then Rythmbox; then I started a song playing. 174 seconds (by the messages time stamp) into the song, there was an Underrun! message. I quit out of Rhythmbox, then quit out of cyclictest. There is considerable output in histogram.txt :-) :-) so I deleted the run messages in front of the histogram, then all histogram buckets with a zero count. There are still 12876 lines in the reduced histogram.txt file. I took the same file and sorted it in decreasing number of counts, and I've attached that. You can see there are a lot of hits in the 999.999 bucket (that's one second, I think?) - that seems weird to me. Over and above that, there are a significant number of hits in the 944.013 bucket (that's 0,944 seconds, I think?). And lots of other high numbers. Does this help? ** Attachment added: "Histogram of cyclictest sorted in decreasing order of counts" http://launchpadlibrarian.net/49037137/histogram_sorted.txt -- Wireless blocks USB-Audio, leading to dropouts https://bugs.launchpad.net/bugs/579117 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
