https://bugs.kde.org/show_bug.cgi?id=500337

tesfab...@gmail.com changed:

           What    |Removed                     |Added
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                 CC|                            |tesfab...@gmail.com

--- Comment #1 from tesfab...@gmail.com ---
It also happens to me with an external monitor via Display Port (it uses
ddcutil).

I'm on ArchLinux with Plasma 6.3.1 (like this bug report), ddcutil 2.1.4
(there's 2.2.0 in testing in Arch's repos, I don't know if it improves things).

This is what `ddcutil detect` reports:

```
Display 1
   I2C bus:  /dev/i2c-10
   DRM connector:           card1-DP-1
   EDID synopsis:
      Mfg id:               PHL - Philips Consumer Electronics Company
      Model:                PHL 326M6V
      Product code:         49555  (0xc193)
      Serial number:        
      Binary serial number: [REDACTED]
      Manufacture year:     2019,  Week: 10
   VCP version:         3.0
```

This is what it says before shutting the screen off:
$ ddcutil getvcp 10
VCP code 0x10 (Luminosity                    ): current value =     0, max
value =   100

This is after (done via using KDE's power management "Switch the screen off"
customizable shortcut):
$ ddcutil getvcp 10
VCP code 0x10 (Luminosity                    ): current value =   100, max
value =   100

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