https://bugzilla.kernel.org/show_bug.cgi?id=95911
--- Comment #7 from gitne@excite.co.jp --- (In reply to Michel Dänzer from comment #6)
Is this a regression compared to older kernel versions? If yes, can you bisect or at least narrow down which kernel version is the last good / first bad one?
Unfortunately, I cannot tell if this bug is a regression or new. I have started to experience this bug only with my new piece of hardware AMD Radeon R7. I have not tested specifically on a range different kernel versions either, nor intend to bisect anything. Sorry, but I am using my machine to do actual work and do not have time to do this kind of testing nor have the required knowledge to compile the kernel. So no, I am not a kernel developer. If I were, I would probably fix this and submit a patch but I am not.
The AMD APU Radeon R7 should be a common piece of hardware by now, and very similar to any other APU Radeon R* so testing should be relatively easy for kernel developers.
All I can say is that I have went through all the F21 kernel versions with the same annoying effect. Since, Fedora kernel versions are somewhat lagging a bit behind the upstream kernel versions, and hibernation not being a No. 1 test feature, plus the R7 being a relatively new piece of hardware makes me assume that this has not been fixed in the latest kernel versions either. I would really love hibernation to work because it is a very practical and time saving feature.