NOPE, NEVERMIND. The issue is still happening. I thought I did a full reboot, with [deep], and came back. But I just came back after an hour or two and the BACKLIGHT turned on, but it still wouldn't come back from suspend. This seems like it attempted to come back online: $ journalctl -o short-precise -k -b -1 Nov 06 06:48:08.615902 sedna kernel: ACPI: EC: EC stopped Nov 06 06:48:08.615935 sedna kernel: PM: Saving platform NVS memory Nov 06 06:48:08.615965 sedna kernel: Disabling non-boot CPUs ... Nov 06 06:48:08.616002 sedna kernel: IRQ 41: no longer affine to CPU1 Nov 06 06:48:08.616039 sedna kernel: IRQ 42: no longer affine to CPU1 Nov 06 06:48:08.616071 sedna kernel: IRQ 43: no longer affine to CPU1 Nov 06 06:48:08.616104 sedna kernel: smpboot: CPU 1 is now offline Nov 06 06:48:08.616136 sedna kernel: ACPI: Low-level resume complete Nov 06 06:48:08.616165 sedna kernel: ACPI: EC: EC started Nov 06 06:48:08.616199 sedna kernel: PM: Restoring platform NVS memory Nov 06 06:48:08.616230 sedna kernel: Enabling non-boot CPUs ... Nov 06 06:48:08.616255 sedna kernel: x86: Booting SMP configuration: Nov 06 06:48:08.616284 sedna kernel: smpboot: Booting Node 0 Processor 1 APIC 0x2 Nov 06 06:48:08.616313 sedna kernel: CPU1 is up Nov 06 06:48:08.616338 sedna kernel: ACPI: Waking up from system sleep state S3 Nov 06 06:48:08.616374 sedna kernel: ACPI: EC: interrupt unblocked Nov 06 06:48:08.616405 sedna kernel: ACPI: EC: event unblocked Nov 06 06:48:08.616435 sedna kernel: sd 0:0:0:0: [sda] Starting disk Nov 06 06:48:08.616612 sedna kernel: elan_i2c i2c-ELAN0000:00: invalid report id data (ff) Nov 06 06:48:08.616821 sedna kernel: usb 1-3: reset high-speed USB device number 2 using xhci_hcd Nov 06 06:48:08.617097 sedna kernel: ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300) Nov 06 06:48:08.617134 sedna kernel: ata1.00: configured for UDMA/133 Nov 06 06:48:08.617164 sedna kernel: OOM killer enabled. Nov 06 06:48:08.617198 sedna kernel: Restarting tasks ... done. Nov 06 06:48:08.617227 sedna kernel: PM: suspend exit Nov 06 06:48:12.073184 sedna kernel: wlp1s0: authenticate with 1c:3b:f3:4c:6b:6f Nov 06 06:48:12.081030 sedna kernel: wlp1s0: send auth to 1c:3b:f3:4c:6b:6f (try 1/3) Nov 06 06:48:12.081106 sedna kernel: wlp1s0: authenticated Nov 06 06:48:12.081155 sedna kernel: wlp1s0: associate with 1c:3b:f3:4c:6b:6f (try 1/3) Nov 06 06:48:12.083802 sedna kernel: wlp1s0: RX AssocResp from 1c:3b:f3:4c:6b:6f (capab=0x1511 status=0 aid=3) Nov 06 06:48:12.089026 sedna kernel: wlp1s0: associated Nov 06 06:48:12.139628 sedna kernel: IPv6: ADDRCONF(NETDEV_CHANGE): wlp1s0: link becomes ready [there are no more entries] [then the reboot] $ sudo dmesg Nov 06 06:49:04.835437 sedna kernel: microcode: microcode updated early to revision 0x2f, date = 2019-11-12 Nov 06 06:49:04.835488 sedna kernel: Linux version 5.13.0-20-generic (buildd@lgw01-amd64-013) (gcc (Ubuntu 11.2.0-7ubuntu2) 11.2.0, GNU ld (GNU Binut> Nov 06 06:49:04.835508 sedna kernel: Command line: BOOT_IMAGE=/boot/vmlinuz-5.13.0-20-generic root=UUID=afb97784-f7dc-4891-8f9b-f6c22831a037 ro mitig> Nov 06 06:49:04.835521 sedna kernel: KERNEL supported cpus: Nov 06 06:49:04.835533 sedna kernel: Intel GenuineIntel Nov 06 06:49:04.835545 sedna kernel: AMD AuthenticAMD Nov 06 06:49:04.835558 sedna kernel: Hygon HygonGenuine Nov 06 06:49:04.835570 sedna kernel: Centaur CentaurHauls Nov 06 06:49:04.835584 sedna kernel: zhaoxin Shanghai Nov 06 06:49:04.835600 sedna kernel: x86/fpu: Supporting XSAVE feature 0x001: 'x87 floating point registers' Nov 06 06:49:04.835613 sedna kernel: x86/fpu: Supporting XSAVE feature 0x002: 'SSE registers' Nov 06 06:49:04.835625 sedna kernel: x86/fpu: Enabled xstate features 0x3, context size is 576 bytes, using 'standard' format. Nov 06 06:49:04.835636 sedna kernel: BIOS-provided physical RAM map: Nov 06 06:49:04.835649 sedna kernel: BIOS-e820: [mem 0x0000000000000000-0x000000000009fbff] usable Nov 06 06:49:04.835663 sedna kernel: BIOS-e820: [mem 0x000000000009fc00-0x000000000009ffff] reserved Nov 06 06:49:04.835678 sedna kernel: BIOS-e820: [mem 0x00000000000f0000-0x00000000000fffff] reserved [etc]