power management - screen keeps turning off

I'm having trouble stopping my XFCE/Manjaro system from turning off the monitor. There is no screensaver installed and the power management settings should prevent the monitor going to sleep but it still seems to do it regardless.

Here are the xfce4 power manager settings:

[jamie@manjaro ~]$ xfconf-query -c xfce4-power-manager -lv
/xfce4-power-manager/blank-on-ac                        0
/xfce4-power-manager/blank-on-battery                   0
/xfce4-power-manager/brightness-on-battery              9
/xfce4-power-manager/brightness-switch                  0
/xfce4-power-manager/brightness-switch-restore-on-exit  1
/xfce4-power-manager/critical-power-action              3
/xfce4-power-manager/dpms-enabled                       false
/xfce4-power-manager/dpms-on-ac-off                     0
/xfce4-power-manager/dpms-on-ac-sleep                   0
/xfce4-power-manager/dpms-on-battery-off                0
/xfce4-power-manager/dpms-on-battery-sleep              0
/xfce4-power-manager/lid-action-on-ac                   0
/xfce4-power-manager/lid-action-on-battery              0
/xfce4-power-manager/lock-screen-suspend-hibernate      false
/xfce4-power-manager/logind-handle-lid-switch           false
/xfce4-power-manager/power-button-action                3
/xfce4-power-manager/show-tray-icon                     1

[jamie@manjaro ~]$ inxi -Fxxxza --no-host
System:
  Kernel: 5.4.44-1-MANJARO x86_64 bits: 64 compiler: gcc v: 10.1.0 
  parameters: BOOT_IMAGE=/boot/vmlinuz-5.4-x86_64 
  root=UUID=f73b904a-a05c-4387-b0ca-5cb50d0785d3 rw quiet apparmor=1 
  security=apparmor udev.log_priority=3 
  Desktop: Xfce 4.14.2 tk: Gtk 3.24.20 info: xfce4-panel wm: xfwm4 
  dm: LightDM 1.30.0 Distro: Manjaro Linux 
Machine:
  Type: Laptop System: LENOVO product: 81VV v: Lenovo IdeaPad S340-14IIL 
  serial: <filter> Chassis: type: 10 v: Lenovo IdeaPad S340-14IIL 
  serial: <filter> 
  Mobo: LENOVO model: LNVNB161216 v: SDK0R32776 WIN serial: <filter> 
  UEFI: LENOVO v: CUCN16WW(V1.05) date: 10/15/2019 
Battery:
  ID-1: BAT1 charge: 48.9 Wh condition: 51.1/52.5 Wh (97%) volts: 12.7/11.2 
  model: 74726570786C6543 374650334338314C type: Li-ion serial: N/A 
  status: Unknown 
CPU:
  Topology: Quad Core model: Intel Core i7-1065G7 bits: 64 type: MT MCP 
  arch: Ice Lake family: 6 model-id: 7E (126) stepping: 5 microcode: 78 
  L2 cache: 8192 KiB 
  flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx 
  bogomips: 23968 
  Speed: 2209 MHz min/max: 400/3900 MHz Core speeds (MHz): 1: 1657 2: 1543 
  3: 1613 4: 1447 5: 1368 6: 1369 7: 1385 8: 1837 
  Vulnerabilities: Type: itlb_multihit status: KVM: Split huge pages 
  Type: l1tf status: Not affected 
  Type: mds status: Not affected 
  Type: meltdown status: Not affected 
  Type: spec_store_bypass 
  mitigation: Speculative Store Bypass disabled via prctl and seccomp 
  Type: spectre_v1 
  mitigation: usercopy/swapgs barriers and __user pointer sanitization 
  Type: spectre_v2 mitigation: Enhanced IBRS, IBPB: conditional, RSB filling 
  Type: tsx_async_abort status: Not affected 
Graphics:
  Device-1: Intel Iris Plus Graphics G7 vendor: Lenovo driver: i915 
  v: kernel bus ID: 00:02.0 chip ID: 8086:8a52 
  Display: x11 server: X.Org 1.20.8 driver: modesetting 
  resolution: 1920x1080~60Hz, 1920x1080~60Hz 
  OpenGL: renderer: Mesa Intel Iris Plus Graphics (ICL GT2) 
  v: 4.6 Mesa 20.0.7 direct render: Yes 
Audio:
  Device-1: Intel Smart Sound Audio vendor: Lenovo driver: snd_hda_intel 
  v: kernel bus ID: 00:1f.3 chip ID: 8086:34c8 
  Device-2: C-Media CM106 Like Sound Device type: USB 
  driver: hid-generic,snd-usb-audio,usbhid bus ID: 1-3:2 chip ID: 0d8c:0102 
  Sound Server: ALSA v: k5.4.44-1-MANJARO 
Network:
  Device-1: Qualcomm Atheros QCA9377 802.11ac Wireless Network Adapter 
  vendor: Lenovo driver: ath10k_pci v: kernel port: 3040 bus ID: 02:00.0 
  chip ID: 168c:0042 
  IF: wlp2s0 state: up mac: <filter> 
  Device-2: Qualcomm Atheros type: USB driver: btusb bus ID: 1-10:4 
  chip ID: 0cf3:e500 
Drives:
  Local Storage: total: 476.94 GiB used: 242.80 GiB (50.9%) 
  ID-1: /dev/nvme0n1 vendor: Intel model: SSDPEKNW512G8L size: 476.94 GiB 
  block size: physical: 512 B logical: 512 B speed: 31.6 Gb/s lanes: 4 
  serial: <filter> rev: C02C scheme: GPT 
Partition:
  ID-1: / raw size: 476.64 GiB size: 468.16 GiB (98.22%) 
  used: 242.80 GiB (51.9%) fs: ext4 dev: /dev/nvme0n1p2 
Sensors:
  System Temperatures: cpu: 64.0 C mobo: N/A 
  Fan Speeds (RPM): N/A 
Info:
  Processes: 255 Uptime: 1h 56m Memory: 19.36 GiB used: 2.19 GiB (11.3%) 
  Init: systemd v: 245 Compilers: gcc: 10.1.0 clang: 10.0.0 Shell: bash 
  v: 5.0.17 running in: xfce4-terminal inxi: 3.0.37 

Your bios is not up to date

  • CUCN21WW(V1.10), CUCN65WW(V3.07)
  • 09 Jun 2020
  • 14.39 MB
  • Critical

https://pcsupport.lenovo.com/de/en/products/laptops-and-netbooks/ideapad-s-series-netbooks/s340-14iil/downloads/driver-list/component?name=BIOS%2FUEFI

  • Try latest kernel, it's a new cpu

  • as workaround try presentation mode (right-click the battery icon in the tray)

Thanks for the tip about presentation mode, i'll definitely give that a go.

The odd thing is I did have it working ok before, it just started ignoring power-manager a couple of weeks ago. I don't know if it was a system update or some software I installed, but clearly something changed. I did install displayCAL and create a new icc profile about 2-3 weeks ago but I don't see that that would affect it.

Update: Sadly presentation mode isn't preventing the screen from blanking. I feel like maybe the power manager settings are just being ignored entirely. :-/

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