Upstream dev here. There is a bug in the ALSA drivers that causes the playback problem you describe. Kernel bug 177571 is the one: https://bugzilla.kernel.org/show_bug.cgi?id=177571. That patch needs to be added to Ubuntu's kernel to fix this.
The relevant patch in the linux kernel 4.8.y tree: http://git.kernel.org/cgit/linux/kernel/git/stable/linux- stable.git/commit/?h=linux-4.8.y&id=0f574c90d7476474d6b4e1d032e75cdf6c722fb3 Upstream bug report: https://sourceforge.net/p/rosegarden/bugs/1537/ Unrelated: The HR Timer issue is a long-standing mystery that upstream doesn't have time to address right now. Use the PCM timers instead if you need better resolution than the system timer. ** Bug watch added: Linux Kernel Bug Tracker #177571 http://bugzilla.kernel.org/show_bug.cgi?id=177571 ** Also affects: linux (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1637917 Title: rosegarden 16.06 plays only first note, locks up PC when trying to use HR timer Status in linux package in Ubuntu: New Status in rosegarden package in Ubuntu: New Bug description: I don't know why, but I cannot remember Rosegarden ever to be working during the last ten years. I load up some of the examples shipped with it, try to play it, the playback counter starts to wildly fluctuate back and forth around the time point 0. When I try to set the HP timer as timer source for the sequencer, the entire PC freezes. I tried this with regular linux- generic kernel on amd64, and low-latency stock kernels from Ubuntu 16.10. The only way to get the timer on the playback display going forward is to select a recording or playback device as a timer source. But even then only the first note gets played and nothing more. I even tried not having any devices connected to rosegarden, but the playback timer just kept fluctuating around 0. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1637917/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
