Upstream did not have any ideas on what may have introduced this. The next best step may be to perform a Reverse bisect since we know the bug is fixed in 3.9.0-rc4.
Before starting the reverse bisect, can you test the latest 3.8 stable kernel, to confirm it still exists there: http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.8.10-raring/
Upstream did not have any ideas on what may have introduced this. The next best step may be to perform a Reverse bisect since we know the bug is fixed in 3.9.0-rc4.
Before starting the reverse bisect, can you test the latest 3.8 stable kernel, to confirm it still exists there: kernel. ubuntu. com/~kernel- ppa/mainline/ v3.8.10- raring/
http://