The test kernel I built an post in comment #295 was Ubuntu-3.13.0-86.131 with d215f91 reverted. However, d215f91 was committed in Ubuntu-3.13.0-35.61.
I wonder if it could be that the second bad commit is actually between 3.13.0-35.61 and 3.13.0-86.131.
Can you continue to run 4c48c35 from the original bisect and see if it is good for a long period?
As another test to see if there is a second bad commit added later in Trusty 3.13, I can build a 3.13.0-35.62 kernel with d215f91 reverted.
The test kernel I built an post in comment #295 was Ubuntu- 3.13.0- 86.131 with d215f91 reverted. However, d215f91 was committed in Ubuntu- 3.13.0- 35.61.
I wonder if it could be that the second bad commit is actually between 3.13.0-35.61 and 3.13.0-86.131.
Can you continue to run 4c48c35 from the original bisect and see if it is good for a long period?
As another test to see if there is a second bad commit added later in Trusty 3.13, I can build a 3.13.0-35.62 kernel with d215f91 reverted.