I have been running Ubuntu with Linux 4.8 kernel. Yesterday I have tried switching to latest from Mainline, i.e. 4.10-rc5 and the Line6 USB Toneport (UX2 Studio) has stopped working. There is no sound, playback freezes when I select the device. Please let me know what information you need about my system - happy to provide logs and debug info.
$ uname -a Linux precision 4.10.0-041000rc5-generic #201701221730 SMP Sun Jan 22 22:32:28 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
Created attachment 252981 [details] List of modules from /proc/modules
Created attachment 252991 [details] Dump of /proc/ioports
Created attachment 253001 [details] Dump of /proc/iomem
Created attachment 253011 [details] lspci -vvv
Created attachment 253021 [details] Dump of dmesg You can see that there are some error messages about read and write failures related to the snd_usb_toneport module.
On Tue, Jan 24, 2017 at 08:03:49AM +0000, bugzilla-daemon@bugzilla.kernel.org wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=193221 > > Bug ID: 193221 > Summary: Regression: Line6 Toneport stops working on 4.10 All USB bugs should be sent to the linux-usb@vger.kernel.org mailing list, and not entered into bugzilla. Please bring this issue up there, if it is still a problem in the latest kernel release.
The same problem on Gentoo with vanilla-sources 4.9.4-4.9.6 with Line6 POS Studio UX1
There is a revert that fixes this patch that is queued for the next 4.10 RC, and the full patch is going to be included in 4.11, according to this thread: http://marc.info/?l=linux-usb&m=148645695630414&w=2