# Screen cannot lay out a video wall

> Canonical HTML: https://screenrig.ai/problems/wall-unsupported/

HTTP 409 · `wall_unsupported`

## What it means

The API answers with HTTP 409 Conflict and an `application/problem+json` document when the condition is Screen cannot lay out a video wall. The document's `type` member is `https://screenrig.ai/problems/wall-unsupported`, the address of this page, and its `code` member is `wall_unsupported`.

## What to do

This screen's Player did not declare the display.wall host capability, so it cannot lay out a video wall. Use a Linux Player that drives its outputs through cage and wlr-randr, update it to its current version, then set the wall again.

## Player action

This problem defines no Player action class. It belongs to a project, pairing or account flow that an agent or the dashboard drives.

## Reference

| Field | Value |
| --- | --- |
| Code | `wall_unsupported` |
| HTTP status | `409 Conflict` |
| Type | `https://screenrig.ai/problems/wall-unsupported` |
| Player action | `none` |

- [All problem types](https://screenrig.ai/problems/)
- [API reference](https://screenrig.ai/docs/api/#problems)
- [Problem registry YAML](https://screenrig.ai/docs/api/problems.yaml)