Public bug reported: A recent Ubuntu 12.04 update has resulted in a flood of kernel log messages like:
Jun 10 16:53:50 fringe kernel: [1083938.675908] delay: estimated 222, actual 1 Jun 10 16:53:53 fringe kernel: [1083941.451942] delay: estimated 89, actual 0 Jun 10 16:54:02 fringe kernel: [1083950.876085] delay: estimated 309, actual 1 Jun 10 16:54:12 fringe kernel: [1083961.212252] delay: estimated 266, actual 1 Jun 10 16:54:28 fringe kernel: [1083976.940540] delay: estimated 265, actual 0 Jun 10 16:54:31 fringe kernel: [1083979.444548] delay: estimated 177, actual 1 Jun 10 16:54:40 fringe kernel: [1083989.164726] delay: estimated 265, actual 1 Jun 10 16:54:48 fringe kernel: [1083997.216594] delay: estimated 354, actual 1 Jun 10 16:54:48 fringe kernel: [1083997.220835] delay: estimated 134, actual 1 Jun 10 16:54:55 fringe kernel: [1084003.572938] delay: estimated 222, actual 1 Jun 10 16:55:31 fringe kernel: [1084039.821516] delay: estimated 266, actual 1 Jun 10 16:55:33 fringe kernel: [1084041.717585] delay: estimated 89, actual 0 whenever a USB sound card is used. (Even just sitting idle with no playback. As long as the card is selected as the output device in Sound settings, it happens.) Here's a link to a message from about a year ago where Pierre-Louis Bossart says he is the one who added this diagnostic message: http://permalink.gmane.org/gmane.linux.alsa.devel/97011 Other references include: https://bugzilla.redhat.com/show_bug.cgi?format=multiple&id=798844 http://www.gossamer-threads.com/lists/linux/kernel/1592033?do=post_view_threaded There appears to be no functional impact or difference compared to how the sound card worked prior to the update. The warnings are either in error or warning of an insignificant condition. The main problem with them is that they obscure important errors in the kernel logs, and waste disk space. ** Affects: alsa-utils (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to alsa-utils in Ubuntu. https://bugs.launchpad.net/bugs/1189661 Title: "delay: estimated N, actual N" warning logged by kernel Status in “alsa-utils” package in Ubuntu: New Bug description: A recent Ubuntu 12.04 update has resulted in a flood of kernel log messages like: Jun 10 16:53:50 fringe kernel: [1083938.675908] delay: estimated 222, actual 1 Jun 10 16:53:53 fringe kernel: [1083941.451942] delay: estimated 89, actual 0 Jun 10 16:54:02 fringe kernel: [1083950.876085] delay: estimated 309, actual 1 Jun 10 16:54:12 fringe kernel: [1083961.212252] delay: estimated 266, actual 1 Jun 10 16:54:28 fringe kernel: [1083976.940540] delay: estimated 265, actual 0 Jun 10 16:54:31 fringe kernel: [1083979.444548] delay: estimated 177, actual 1 Jun 10 16:54:40 fringe kernel: [1083989.164726] delay: estimated 265, actual 1 Jun 10 16:54:48 fringe kernel: [1083997.216594] delay: estimated 354, actual 1 Jun 10 16:54:48 fringe kernel: [1083997.220835] delay: estimated 134, actual 1 Jun 10 16:54:55 fringe kernel: [1084003.572938] delay: estimated 222, actual 1 Jun 10 16:55:31 fringe kernel: [1084039.821516] delay: estimated 266, actual 1 Jun 10 16:55:33 fringe kernel: [1084041.717585] delay: estimated 89, actual 0 whenever a USB sound card is used. (Even just sitting idle with no playback. As long as the card is selected as the output device in Sound settings, it happens.) Here's a link to a message from about a year ago where Pierre-Louis Bossart says he is the one who added this diagnostic message: http://permalink.gmane.org/gmane.linux.alsa.devel/97011 Other references include: https://bugzilla.redhat.com/show_bug.cgi?format=multiple&id=798844 http://www.gossamer-threads.com/lists/linux/kernel/1592033?do=post_view_threaded There appears to be no functional impact or difference compared to how the sound card worked prior to the update. The warnings are either in error or warning of an insignificant condition. The main problem with them is that they obscure important errors in the kernel logs, and waste disk space. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/alsa-utils/+bug/1189661/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
