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Crash or video playback instability after KDE monitor power down #323

Description

@Bellimora

Environment

Release Notes

You are at 37.4, 187.8, 1509.9 in Puff located at simhost-0ffcb041d8ca5c492.agni
SLURL: https://maps.secondlife.com/secondlife/Puff/37/188/1510
(global coordinates 183589.0, 305084.0, 1509.9)
Second Life RC BlueSteel 2026-06-12.27437375581
Release Notes

CPU: AMD Ryzen 9 3900X 12-Core Processor (4673.82 MHz)
Memory: 31994 MB
Concurrency: 24
OS Version: Linux 7.0.9-200.nobara.fc43.x86_64 #1 SMP PREEMPT_DYNAMIC Sun May 17 16:46:25 UTC 2026 x86_64
Graphics Card Vendor: NVIDIA Corporation
Graphics Card: NVIDIA GeForce RTX 4070 Ti SUPER/PCIe/SSE2

OpenGL Version: 4.6.0 NVIDIA 595.71.05

Window size: 2560x1406
Font Size Adjustment: 96pt
UI Scaling: 1.25
Draw distance: 256m
Bandwidth: 3000kbit/s
LOD factor: 1.75
Render quality: 5
Texture memory: 16376MB
Disk cache: Max size 2150 MB (100.0% used)
HiDPI display mode: true

RestrainedLove API: RLV v3.4.3 / RLVa v2.5.0.62472
J2C Decoder Version: OpenJPEG runtime: 2.5.4
Audio Driver Version: FAudio 3.249.148 — Default Device (6ch @ 48000Hz)
Dullahan: 1.23.0.202605301603
  CEF: 148.0.9+g0d9d52a+chromium-148.0.7778.180
  Chromium: 148.0.7778.180
LibVLC Version: 3.0.23
Voice Server Version: Secondlife WebRTC Gateway 1.3.2-0c3d727/estate

Compiler Version: GCC 150201
Packets Lost: 0/7349 (0.0%)
June 21 2026 20:49:58```

### Description

When KDE powers the monitors down due to inactivity alchemy hard freezes, forcing me to issue a kill command to shut it down, or it will APPEAR to be fine, but all video playback on any web browser with hardware acceleration enabled will just straight up fail until I shut down alchemy, fish out the errant alchemy process that's still running and smack that down with a kill command.


### Reproduction steps

Reproduction steps: 
1. In power management in KDE set the monitors to power down after a while
2. Start alchemy
3. leave system idle until the monitors power down.
4. wake monitors back up
5. see if alchemy is still running, if yes, try opening a youtube vid in an accelerated web browser (brave in this case, since it's the only thing that does HDR in kde at the moment).

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