On 10/12/2021 04:53, David Wright wrote:
On Thu 09 Dec 2021 at 17:12:01 (-0000), Curt wrote:On 2021-12-09, hdv@gmail <hdv.jadev@gmail.com> wrote:Swap is where a laptop stores RAM during suspend-to-disk, the long term hibernation suspension. Without at least as much swap as RAM, you are limited to suspend-to-RAM. In a more perfect world, the space for suspension would not otherwise be treated as swap space.It certainly was the reason why I always had swap at least as big as RAM in the past on my laptops. However, I have not had any trouble suspending or hibernating my laptops in the years since I reduced swap to 2GB. That is just my experience, and it may not be the same for others. But it might help the thread starter to know this is a feasible option (depending on their use case).It's only that there is a distinction between suspend-to-RAM and suspend-to-disk, the latter using zero power consumption until the machine is powered on. Anyway, you probably already knew that (I didn't).Aka hibernation, it's also incompatible with random-encrypted swap (recommended in https://lists.debian.org/debian-user/2021/12/msg00239.html, and by me, if you have sensitive information on your laptop).
It's a shame that TuxOnIce (aka Software Suspend 2) seems to have disappeared. That was a mostly-userspace hibernation solution that developed some quite neat tricks such as:
* Mounting a swap device prior to hibernation * Graphical progress of hibernationI seem to recall that, because it *was* a userspace solution, you needed to boot a certain amount of kernel and userspace before you could start resuming from hibernation, so there should have been a point where you could handle decryption (although, you would need a known key to decrypt the swap device, I suppose).
Cheers, David.
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