[kde] [Bug 505356] New: HDMI Display (TV) cannot wake up from sleep, even when PC actually already woke up

[bugzilla_noreply at kde.org]

https://bugs.kde.org/show_bug.cgi?id=505356

            Bug ID: 505356
           Summary: HDMI Display (TV) cannot wake up from sleep, even when
                    PC actually already woke up
    Classification: I don't know
           Product: kde
      Version First unspecified
       Reported In:
          Platform: Fedora RPMs
                OS: Linux
            Status: REPORTED
          Severity: major
          Priority: NOR
         Component: general
          Assignee: unassigned-bugs at kde.org
          Reporter: mohdyusuf at gmail.com
  Target Milestone: ---

SUMMARY
HDMI TV display connected to PC (Fedora 42 + KDE) cannot wake up from sleep.
PC can wake up on mouse + keyboard USB trigger, but TV screen will not show
display.
Same hardware works completely fine on Windows 11 (screen can wake up fine).

STEPS TO REPRODUCE
1. Leave PC idle, it goes to sleep. Screen goes to sleep (HDMI).
2. Tap on keyboard, PC wakes up from the sleep.
3.

OBSERVED RESULT
TV shows “hdmi connected” but the screen remained dark.

EXPECTED RESULT
TV screen should wake up. 

SOFTWARE/OS VERSIONS
Windows: 
macOS: 
(available in the Info Center app, or by running `kinfo` in a terminal window)
Linux/KDE Plasma: Fedora 42, kernel 6.14.9-300.fc42.x86_64
KDE Plasma Version: 6.3.5 
KDE Frameworks Version: 6.14.0
Qt Version: 6.9.0

ADDITIONAL INFORMATION
Hardware:
- AMD Ryzen 9 7900
- NVidia RTX 4090 (Gigabyte) - driver version 575.57.08
- Gigabyte B650 Aorus Pro AX
- TV TCL QM8 144hz

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