I'm reopening this old bug report, because it's still not really fixed, even in the most recent kernels, and I've finally had a chance to do some more debugging. Here's what I found, after doing some git bisects and compiling a whole lot of kernels:
This is the first commit causing the problem: kernels after this point exhibit the "sequence errors" messages in the log. commit c44b225077bb1fb25ed5cd5c4f226897b91bedd4 Author: Alan Stern <[email protected]> Date: Mon Oct 1 10:32:09 2012 -0400 UHCI: implement new semantics for URB_ISO_ASAP Later on, more usb changes occured around commit bef073b067a7b1874a6b381e0035bb0516d71a77, right before v3.12-rc3 - after this point, the messages no longer appear in the log, but instead, there's a kernel panic when I use the Tascam - sometimes it works for a while, and sometimes it crashes right away. This is true for kernels well into this year (though I haven't tested the most recent ones, it doesn't look like this USB code has been touched since 2013). I hope this is useful for further debugging - as things stand, I have to boot up a 3-year-old kernel to use the device! ** Changed in: linux (Ubuntu) Status: Expired => Confirmed -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1177394 Title: USB sequence errors in snd_usb_usx2y To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1177394/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
