This PC is my brother's, originally installed 24 months ago by myself with 15.1. He claims sleep/hibernate used to work before the upgrade to 15.2, and now 15.3. He wants hibernate/sleep to work again. So far, I haven't found the secret to success. # inxi -Fxzy System: Kernel: 5.3.18-lp152.41-default x86_64 bits: 64 compiler: gcc v: 7.5.0 Desktop: KDE Plasma 5.18.6 Distro: openSUSE Leap 15.3 Machine: Type: Desktop Mobo: ASRock model: N68C-GS FX serial: N/A BIOS: American Megatrends v: P1.40 date: 10/31/2012 CPU: Info: 6-Core model: AMD Phenom II X6 1055T bits: 64 type: MCP arch: K10 rev: 0 cache: L2: 3 MiB flags: lm nx pae sse sse2 sse3 sse4a svm bogomips: 33754 Speed: 803 MHz min/max: 800/2800 MHz boost: enabled Core speeds (MHz): 1: 803 2: 1470 3: 804 4: 1772 5: 1667 6: 1675 Graphics: Device-1: NVIDIA C61 [GeForce 7025 / nForce 630a] vendor: ASRock driver: nouveau v: kernel bus-ID: 00:0d.0 Display: x11 server: X.Org 1.20.3 driver: loaded: modesetting unloaded: fbdev,vesa resolution: 1680x1050~60Hz OpenGL: renderer: llvmpipe (LLVM 11.0.1 128 bits) v: 4.5 Mesa 20.2.4 direct render: Yes Audio: Device-1: NVIDIA MCP61 High Definition Audio vendor: ASRock driver: snd_hda_intel v: kernel bus-ID: 00:05.0 Sound Server-1: ALSA v: k5.3.18-lp152.41-default running: yes Sound Server-2: PulseAudio v: 14.2-rebootstrapped running: no Sound Server-3: PipeWire v: 0.3.24 running: no Network: Device-1: NVIDIA MCP61 Ethernet vendor: ASRock 939NF6G-VSTA Board type: network bridge driver: forcedeth v: kernel port: e080 bus-ID: 00:07.0 IF: eth0 state: up speed: 1000 Mbps duplex: full mac: <filter> Drives: Local Storage: total: 111.79 GiB used: 204.73 GiB (183.1%) ID-1: /dev/sda vendor: A-Data model: SU650 size: 111.79 GiB Partition: ID-1: / size: 17.18 GiB used: 9.41 GiB (54.8%) fs: ext4 dev: /dev/sda3 ID-2: /home size: 51.45 GiB used: 14.53 GiB (28.2%) fs: ext4 dev: /dev/sda5 Swap: ID-1: swap-1 type: partition size: 4 GiB used: 0 KiB (0.0%) dev: /dev/sda2 Sensors: System Temperatures: cpu: 33.5 C mobo: N/A Fan Speeds (RPM): N/A Info: Processes: 191 Uptime: 1h 16m Memory: 3.59 GiB used: 816 MiB (22.2%) Init: systemd runlevel: 5 Compilers: gcc: N/A Packages: 2580 Shell: Bash v: 4.4.23 inxi: 3.3.04 The BIOS doesn't have any setting labeled S1 or S3, but the ACPI setting it does have that Google says equates to S3 is enabled. To generate the following, I first booted to multi-user, logged in as root, then issued systemctl start systemd-suspend. The response was no different that I could tell than by selecting sleep or hibernate from Plasma's Power/Session menu. # dmesg https://paste.opensuse.org/99478212 # journalctl -b https://paste.opensuse.org/10906426 My search fu is fubar again. I was sure there was recent discussion about this subject either on a mailing list or on the forums, but I'm not finding it. Is there anything in the two logs to explain why an attempt to suspend or hibernate results either in: 1-several seconds of black screen without a poweroff, then all coming back as if resume had been intentionally triggered, or 2-several seconds of black screen without a poweroff, then all coming back as if screenlocker had been triggered, or 3-reboot Does anyone know of some bug that needs a workaround, or a fix or config change required? Is this supposed to be controllable via YaST? The only place I see power control settings are in Plasma's systemsettings, where screen energy saving and suspend session are enabled, but the other three checkboxes (including button events) not. -- Evolution as taught in public schools is, like religion, based on faith, not based on science. Team OS/2 ** Reg. Linux User #211409 ** a11y rocks! Felix Miata