Lg gram - KDE - the external monitor turn on only if plugin it before the boot or after the command inix.

Hi all,
below the hardware details.
I have a LG gram laptop with a little annoying problem, it is little but if I can fix it will be better. :slight_smile:
In my home I would like to work using my big external monitor instead of the internal one but when i plug in the HDMI cable the external monitor remains black.

PROBLEM:
IF i plug in the monitor (HDMI) before the boot, the KDE shows me the two monitor (internal and external), but IF I plug the monitor after the boot then nothing happens.
BUT if i open the terminal and send the command "inxi -Fxxx" then the monitor blinks one time and then it start to work perfectly as in the "boot scenario".
It seems like only after the command inix starts to collect the hardware info that the system notices the monitor.
Any idea why? Something that I can try to fix that behaviour?
Thank you.

Valerio

System:
  Host: valerio-pc Kernel: 5.7.0-3-MANJARO x86_64 bits: 64 compiler: gcc v: 10.1.0 
  Desktop: KDE Plasma 5.18.5 tk: Qt 5.15.0 wm: kwin_x11 dm: SDDM 
  Distro: Manjaro Linux 
Machine:
  Type: Laptop System: LG product: 14Z990-V.AR52D v: 0.1 serial: <root required> 
  Chassis: type: 10 v: 0.1 serial: <root required> 
  Mobo: LG model: 14Z990 v: FAB1 serial: <root required> UEFI: Phoenix 
  v: W1ZD1230 X64 date: 06/03/2019 
Battery:
  ID-1: CMB0 charge: 37.8 Wh condition: 70.4/72.8 Wh (97%) volts: 7.7/7.7 
  model: LG LGC-LGC type: Li-ion serial: 9008 status: Discharging cycles: 14 
CPU:
  Topology: Quad Core model: Intel Core i5-8265U bits: 64 type: MT MCP 
  arch: Kaby Lake rev: C L2 cache: 6144 KiB 
  flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 28808 
  Speed: 1985 MHz min/max: 400/3900 MHz Core speeds (MHz): 1: 1985 2: 1980 3: 2026 
  4: 1979 5: 1999 6: 1982 7: 1962 8: 2002 
Graphics:
  Device-1: Intel UHD Graphics 620 vendor: LG driver: i915 v: kernel 
  bus ID: 00:02.0 chip ID: 8086:3ea0 
  Display: x11 server: X.Org 1.20.8 driver: intel unloaded: modesetting 
  alternate: fbdev,vesa compositor: kwin_x11 tty: N/A 
  OpenGL: renderer: Mesa Intel UHD Graphics 620 (WHL GT2) v: 4.6 Mesa 20.0.7 
  direct render: Yes 
Audio:
  Device-1: Intel Cannon Point-LP High Definition Audio vendor: LG 
  driver: snd_hda_intel v: kernel bus ID: 00:1f.3 chip ID: 8086:9dc8 
  Sound Server: ALSA v: k5.7.0-3-MANJARO 
Network:
  Device-1: Intel Cannon Point-LP CNVi [Wireless-AC] driver: iwlwifi v: kernel 
  port: 2000 bus ID: 00:14.3 chip ID: 8086:9df0 
  IF: wlp0s20f3 state: down mac: 50:eb:71:1e:21:a2 
Drives:
  Local Storage: total: 238.47 GiB used: 17.50 GiB (7.3%) 
  ID-1: /dev/sda vendor: SK Hynix model: HFS256G39TNF-N3A0A size: 238.47 GiB 
  speed: 6.0 Gb/s serial: MJ97N481711007E55 rev: 0P10 scheme: GPT 
Partition:
  ID-1: / size: 124.46 GiB used: 17.46 GiB (14.0%) fs: ext4 dev: /dev/sda7 
Sensors:
  System Temperatures: cpu: 35.0 C mobo: N/A 
  Fan Speeds (RPM): N/A 
Info:
  Processes: 225 Uptime: 3m Memory: 7.49 GiB used: 541.3 MiB (7.1%) Init: systemd 
  v: 245 Compilers: gcc: 10.1.0 Shell: bash v: 5.0.17 running in: konsole 
  inxi: 3.0.37 

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