After another exhausting searching and testing, and again with the **priceless** help of @apw in IRC,
I(we) may have detect the three responsible commits for the fix. Probably they are three and not one, and certainly the MERGE in which I refer on the above comment #27, it cannot be merged into Ubuntu kernel or any older kernel. The three commits I have combined(cherry-pick them together) - tested and have been worked are: 5838ae610ff36777b8fce6f353c2417980c1a1fa f2f9a2cbaf019481feefe231f996d3602612fa99 634ffcccfbe59d77652804e1beb415d3329b1bc6 Changes are not too many (deletions, modification, additions) and they could be merged to an older Ubuntu kernel, but I'm not sure yet. I will try to cherry-pick them into ubuntu-utopic.git and try to build. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1386695 Title: [3.16.0-23] Resume from suspend/hibernation, GPU lock - possible regression To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1386695/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs