[HIGH] [SDL #4398] Multi-display configuration lost in linux when going fullscreen and then turning back

[Chevalier12]

Tracking upstream SDL issue libsdl-org#4398

• Priority: HIGH — provisional triage from SDL-OPEN-ISSUES-PRIORITIES.md, NOT an official SDL severity.
• Source: Multi-display configuration lost in linux when going fullscreen and then turning back libsdl-org/SDL#4398
• Original title: Multi-display configuration lost in linux when going fullscreen and then turning back
• Reported by: brawaga
• Upstream state at capture: open; state reason:
• Created: 2021-05-24T14:01:25.0000000Z; updated: 2025-08-26T22:07:51.0000000Z
• Snapshot captured: 2026-09-07T17:43:56.2552831Z
• Upstream labels:
• Upstream milestone (not affected versions): 3.x (https://github.com/libsdl-org/SDL/milestone/6)
• Upstream assignees: icculus
• Upstream comments included: 1
• Locked: False; lock reason:
• Triage rationale: Stare de afișare/input greșită raportată; verificați dacă problema istorică mai afectează versiunile curente.

This is an attributed tracking copy, not a locally reproduced or confirmed Graphix defect. Applicability, affected versions and ownership still require validation. No automatic synchronization or resolution is implied. Original descriptions and comments are preserved literally in Markdown code blocks to avoid notifying mentioned users or resolving SDL references against Graphix. Attachments, logs, patches and other linked resources remain at their original URLs; external resource contents and edit/event histories are not copied.

Graphix validation checklist

• Read the current upstream issue and discussion.
• Establish affected versions/platforms and whether Graphix is affected.
• Reproduce the reported behavior and identify the invariant owner.
• Implement an ownership-correct fix or document an upstream/external resolution.
• Verify regression coverage and applicable platform/runtime gates.

Original description

I have two displays, one of them rotated 90°. Any SDL application works good in fullscreen, but, after closing or returning to windowed mode, system shows same picture on both displays, and I have to restore settings manually. That's really annoying, especially because fullscreen key could be pressed not intentially.

Original discussion (chronological)

Original comment by icculus

Source: libsdl-org#4398 (comment)
Created: 2021-07-30T04:50:32.0000000Z; updated: 2021-07-30T04:50:32.0000000Z; association: COLLABORATOR

This isn't going to make it for 2.0.16, tracking it down is going to take longer than we have.