Re: x86 hibernate, resume with different kernel version
From: "Rafael J. Wysocki" <rafael@kernel.org>
Date: 2016-06-16 22:00:22
On Thu, Jun 16, 2016 at 9:06 PM, Johannes Stezenbach [off-list ref] wrote:
On Thu, Jun 16, 2016 at 02:11:48PM +0200, Rafael J. Wysocki wrote:quoted
On Thu, Jun 16, 2016 at 12:03 PM, Johannes Stezenbach [off-list ref] wrote:quoted
it's not important for me but I hibernated kernel v4.5.7 and inadvertantly resumed using v4.6.2, and ISTR this should work (confirmed by looking into git where I found commit cc456c4e7cac3837a86aaa7ca3cb9f488d44d196). My swap is an LVM volume inside dm-crypt, on boot the kernel read the resume image but then immediately reset and invalidated it. I'm using Debian sid, the initrd calls /bin/resume from klibc-utils package. So, should this still work? I couldn't find any information about it.It should in theory, but may not in fact due to bugs discovered recently. This patch should help: https://patchwork.kernel.org/patch/9172981/ (it has to be applied to both the image and boot kernels).I applied it to both the v4.5.7 and v4.6.2 kernels, booted v4.5.7, hibernated, booted v4.6.2 to resume: still resets.
Well, it looks broken now, but it used to work at one point at least. I need to investigate a bit when the time permits.