# Steam Deck client update fixes Vulkan hang on alt-tab in desktop mode

> **Key takeaway:** The October 21 Steam Deck Client update fixes a bug where Vulkan games would hang after alt-tabbing in desktop mode.

**Published:** 2026-10-21T22:41:03+00:00 
**Source:** Steam Deck HQ (Reviews & Optimizations) 
**Category:** open-gaming 
**Canonical URL:** https://fosswire.org/news/steam-deck-client-update-fixes-vulkan-hang-on-alt-tab-in-des.html 

## Summary
Valve released a small Steam Deck Client update on October 21, 2026. The patch fixes Vulkan games hanging after alt-tab when running in desktop mode, corrects a date display error for users in British Columbia, and updates certificate revocation lists. Users can install it through system settings.

## What the October 21 update changes
- **Vulkan hang fix**: Games using the Vulkan graphics API no longer freeze when users alt-tab away and back in desktop mode
- **Date display fix**: Corrects regional date formatting for users in British Columbia, Canada
- **Certificate revocation lists updated**: Standard security maintenance for SSL/TLS certificate validation
- **Update delivery**: Standard over-the-air update via Steam Deck system settings