I've been using the http://kernel.ubuntu.com/~kernel-ppa/mainline/ to test and narrow down which kernels are good and where the bug was introduced. I'm not sure i'm following the protocol for the bisect stuff exactly, but so far my narrowing has produced these preliminary results. I am testing 4.1 again right now, but the first time i had no problems. Once i look at the bisect information christopher provided i might be able to narrow it down even more.
4.1.0-040100-generic #201510261105 good 4.2.4-040204-generic #201510261009 bad -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1575467 Title: [Dell Inspiron 3451] WARNING: CPU: 1 PID: 1297 at /build/linux-lts- utopic-vy2yyy/linux-lts- utopic-3.16.0/drivers/gpu/drm/i915/intel_display.c:1743 vlv_wait_port_ready+0x126/0x170 [i915]() To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1575467/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
