Comment 25 for bug 1200243

I think I see what may have happened. Commit 288fa3e0 was applied to v3.10-rc1 before commit ec5f0615 :

git describe --contains 288fa3e022eb85fa151e0f9bcd15caeb81679af6
<jsalisbury> v3.10-rc1~194^2~38
 git describe --contains ec5f061564238892005257c83565a0b58ec79295
<jsalisbury> v3.10-rc1~66^2~545

Commit 288fa3e fixed the Hyper-V bug, but then commit ec5f061 introduced a new, but similar bug. They were both introduced in v3.10-rc1, so we never saw the Hyper-V fix before this new bug came along.

@Milan Dadok, I built a Saucy test kernel with commit ec5f061 reverted. The kernel can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1200243/ec5f061-reverted/

Can you test this kernel and post back if it resolves this bug? You may have to install both the linux-image and linux-image-extra .deb packages.