[Fiwex]

What does this PR do?

The first click on a hyprland/workspaces button resolves the dispatch protocol with a systeminfo request. Hyprland answers it by running lspci -vnn synchronously on its main thread (src/helpers/SystemInfo.cpp), and reading the PCI config space of a runtime-suspended discrete GPU wakes it up. On hybrid-GPU laptops the whole compositor freezes until the dGPU has resumed. That matches #5286: the first click freezes the system, later clicks are fine, and it comes back when Waybar restarts. Keybinds and gestures don't go through Waybar, so they never trigger it.

This replaces the probe with eval return nil:

• Only the Lua config manager runs eval and answers ok.
• The legacy manager answers eval is only supported with the lua config manager. eval landed in 0.55 together with the Lua manager, so this still covers a 0.55+ instance started with a hyprland.conf.
• Hyprland < 0.55 answers unknown request.

So the result is the same as with the configProvider check. In Lua mode, Hyprland runs a dispatch request through the same eval path, so the probe adds no side effect the click doesn't already have.

Measured on Hyprland 0.56.2, Ryzen 5000 (Cezanne) + RTX 3050 Ti Mobile, 3 runs each, starting with the dGPU runtime-suspended:

request	time	dGPU afterwards
systeminfo	1640–1659 ms	woken up
eval return nil	9–26 ms	still suspended

isLuaConfigProvider and its tests are replaced by isLuaEvalReply, tested on the replies Hyprland actually sends.

Related issues

Closes #5286

Checklist

• Code is formatted with clang-format
• Builds locally (ninja -C build), meson test passes
• Man page: n/a, no user-facing change
• Tested against the affected module(s): the same change on top of 0.15.0 + fix(hyprland/workspaces): adapt dispatch commands for Lua IPC protocol #5013/fix(hyprland): detect dispatch protocol via configProvider #5231, Hyprland 0.56.2 with hyprland.lua. The first click switches instantly and the log shows detected Lua-based dispatch protocol.

I reproduced the freeze, tested the fix on my machine, and reviewed the diff. With the help of Claude Code for both the code, and this description.

[EldinBegano]

i just tested your fix on 0.57 and it worked for me

[FarukOfCulture]

Works for me as well on 0.57