On Wed, Apr 20, 2016 at 3:20 AM, Lennart Poettering <lenn...@poettering.net> wrote:
> I am still open to add searching for the resume swap partition to the > generator, but only where this may be done reliably, i.e. GPT, but not > MBR. And we should either define a new GPT partition type UUID for > "hibernation swap", or reuse the swap GPT partition type UUID but then > set a flag in it which marks it for use in resume= usage. > > Given that Windows mandates EFI in modern laptops (and thus GPT), I am > pretty sure you can cover large majority of systems with that. But > again, it won't be a 100% solution, since there are of course people > who still use MBR. Windows mandates Secure Boot by default too. And Fedora's kernels disable linux hibernation on Secure Boot enabled systems. So... a large majority can't use linux hibernation right there, if they have a kernel that disables it when Secure Boot is enabled. [root@f23s ~]# mokutil --sb-state SecureBoot enabled [root@f23s ~]# cat /sys/power/state freeze mem [root@f23s ~]# cat /sys/power/disk [disabled] And then GNU parted doesn't support arbitrary partition type GUIDs. Anaconda, and many other installers, use parted for partitioning. My impression is upstream would accept patches to enable arbitrary partition type GUIDs, but no one upstream cares to do this themselves. https://bugzilla.redhat.com/show_bug.cgi?id=1201814#c1 So at this point, I think hibernation is in the realm of expert users and the best advise is to encourage the DE's to disable hibernation by default, and hide hibernation related GUI elements. The emphasis should be on making applications capable of self-saving their state so that if poweroff is called for in low battery cases, it's possible to power off quickly, cleanly, while saving user data. *shrug* -- Chris Murphy _______________________________________________ systemd-devel mailing list systemd-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/systemd-devel
