Can you confirm the issue does not exist in 3.9.0-5-generic? If that is the case, it will be faster to bisect between 3.9.0-5-generic and 3.9.0-6-generic
Also, v3.10-rc6[0] is now available. Saucy will be rebased to v3.10 so, it would be good to know if the bug still exists in mainline.
Can you confirm the issue does not exist in 3.9.0-5-generic? If that is the case, it will be faster to bisect between 3.9.0-5-generic and 3.9.0-6-generic
Also, v3.10-rc6[0] is now available. Saucy will be rebased to v3.10 so, it would be good to know if the bug still exists in mainline.
[0] http:// kernel. ubuntu. com/~kernel- ppa/mainline/ v3.10-rc6- saucy/