Did you happen to have a chance to test the latest mainline kernel, posted in comment #2? Mainline is now up to -rc7, so the link to the kernel would be:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.6-rc7-wily/ If the bug is fixed in mainline, we can perform a reverse bisect to identify the commit that fixes it. However, if the bug still exists in mainline, we would want to perform a regular kernel bisect to find the commit that introduced the regression. To perform a bisect, we need to identify the last good and first bad kernel versions. Per comment #7 v3.16 is good, but v3.19 is bad. We would want to test the versions in between. So if mainline still has the bug, can you test the following upstream kernels: v3.17: http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.17-utopic/ v3.18: http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.18-vivid/ Once we have these results, we can narrow down the versions further to individual release candidates. Thanks in advance! ** Tags added: performing-bisect -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1571798 Title: Broadwell ECRC Support missing in Ubuntu To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1571798/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
