I recently noticed that my laptop fans start running at full speed on suspend, and promptly resumes to normal once I wake it up from suspend. Is that normal?
Interestingly, viewing the kernel messages with dmesg reveals the following lines:
[ 3649.352928] Lockdown: systemd-logind: hibernation is restricted; see man kernel_lockdown.7
[ 3653.387722] Lockdown: systemd-logind: hibernation is restricted; see man kernel_lockdown.7
[ 3653.402975] Lockdown: systemd-logind: hibernation is restricted; see man kernel_lockdown.7
[ 3655.246235] PM: suspend entry (s2idle)
[ 3655.248770] Filesystems sync: 0.002 seconds
[ 3655.249886] Freezing user space processes ... (elapsed 0.016 seconds) done.
[ 3655.266049] OOM killer disabled.
[ 3655.266049] Freezing remaining freezable tasks ... (elapsed 0.000 seconds) done.
[ 3655.267009] printk: Suspending console(s) (use no_console_suspend to debug)
[ 3655.410880] wlp0s20f3: deauthenticating from c0:56:27:67:05:0b by local choice (Reason: 3=DEAUTH_LEAVING)
[ 3656.106084] PM: suspend devices took 0.839 seconds
[ 3656.138777] ACPI: EC: interrupt blocked
[ 5701.226656] ACPI: EC: interrupt unblocked
[ 5701.280445] ACPI Error: No handler or method for GPE 43, disabling event (20200528/evgpe-839)
[ 5702.528426] PM: resume devices took 0.583 seconds
[ 5702.528429] OOM killer enabled.
[ 5702.528429] Restarting tasks ...
[ 5702.529114] mei_hdcp 0000:00:16.0-b638ab7e-94e2-4ea2-a552-d1c54b627f04: bound 0000:00:02.0 (ops i915_hdcp_component_ops [i915])
[ 5702.531300] done.
[ 5702.605207] PM: suspend exit
[ 5702.632440] ACPI Error: No handler or method for GPE 43, disabling event (20200528/evgpe-839)
[ 5709.176632] wlp0s20f3: authenticate with c0:56:27:67:05:0b
[ 5709.180142] wlp0s20f3: send auth to c0:56:27:67:05:0b (try 1/3)
[ 5709.220455] wlp0s20f3: authenticated
[ 5709.221426] wlp0s20f3: associate with c0:56:27:67:05:0b (try 1/3)
[ 5709.225734] wlp0s20f3: RX AssocResp from c0:56:27:67:05:0b (capab=0x1411 status=0 aid=2)
[ 5709.232679] wlp0s20f3: associated
[ 5709.266055] IPv6: ADDRCONF(NETDEV_CHANGE): wlp0s20f3: link becomes ready
[ 5734.283670] Lockdown: systemd-logind: hibernation is restricted; see man kernel_lockdown.7
Following the suggestions in the kernel messages, man 7 kernel_lockdown says:
Unencrypted hibernation/suspend to swap are disallowed as the kernel image is saved to a medium that can then be accessed.
Does that mean that since my swap is unencrypted (I think? I used the default settings when installing Fedora 32 Workstation on my new Lenovo laptop), selecting “Suspend” doesn’t actually suspend my laptop?