Game: Path of Exile 2 — AppID 2694490

System Information:

• GPU: NVIDIA RTX 5090
• Video driver version: 4.6.0 NVIDIA 610.43.02
• Link to full system information report as Gist: https://gist.github.com/Shakool/ee04ec9f404714d9a78532882effcadd
• Kernel: 7.1.1-2-cachyos
• OS: CachyOS Linux, KDE Plasma 6.7, Wayland session
• Proton versions: Proton Experimental (Wine 11)

I confirm:

• [x] that I haven't found an existing compatibility report for this game.
• [x] that I have checked whether there are updates for my system available.

Symptoms:

Electron-based overlay tools (Exiled Exchange 2, Awakened PoE Trade) that use sentinel-based clipboard polling fail to retrieve item text from Path of Exile 2 when the game runs under Wine 11. The overlay shows no result ("No item text found").

Reproduction:

1. Run PoE2 under Proton Experimental or GE-Proton11-1 (Wine 11)
2. Launch Exiled Exchange 2 AppImage with --ozone-platform=x11
3. Hover an item in-game and press Ctrl+D (price check)
4. Observe: overlay does not appear, debug log shows [ClipboardPoller] No item text found
5. Immediately run xclip -o -selection clipboard in a terminal → item text IS present

Root cause analysis:

These tools work by:

1. Writing a sentinel value (_APT_FORCE_EMPTY*) to X11 CLIPBOARD
2. Sending a synthetic Ctrl+Alt+C keypress via XTEST to make PoE2 copy the hovered item
3. Polling the clipboard until the sentinel is replaced with item text, or timing out

Under Wine 11, step 3 times out before the game's clipboard write arrives. The xclip test proves the write does happen — just too late.

Evidence that XTEST delivery is not the issue: the Alt modifier from Ctrl+Alt+C visibly triggers the in-game advanced item description flicker on every attempt, confirming the keypress reaches the game process.

Bisect:

• GE-Proton10-34 (Wine 10.0 Staging) → works correctly
• GE-Proton11-1 (Wine 11.0 Staging) → broken
• Proton Experimental (Wine 11) → [broken / confirm before posting]

The same __APT_FORCE_EMPTY sentinel getting stuck was reproduced independently on CachyOS's Proton fork between builds: https://github.com/CachyOS/proton-cachyos/issues/135

Related upstream issue: https://github.com/Kvan7/Exiled-Exchange-2/issues/982

steam-2694490.log