This seems to be a regression specifically with the C-Media USB Audio chipset. At least C-Media CM6632 and CM6631A are affected: http://article.gmane.org/gmane.linux.usb.general/136685
Unfortunately I have not been able to find an older Ubuntu kernel where this works yet. But I can at least confirm the following kernels all contain the problem: 3.5.0-17.28 3.7.0-0 3.9.0-generic 3.10.0-generic 3.12.0-2-generic 3.12.0-4-generic 3.13.0-24-generic 3.13.0-30-generic 3.13.0-40-generic 3.13.0-51-generic 3.13.0-76-generic 4.2.0-25-generic 4.4 4.5-rc1 4.5-rc2 I will continue testing older kernels. ** Tags removed: kernel-bug-exists-upstream-4.5-rc1 ** Tags added: kernel-bug-exists-upstream-4.5-rc2 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1534856 Title: lsusb hangs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1534856/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
