# Psychtoolbox 3.0.18.8 released

**URL:** https://psychtoolbox.discourse.group/t/psychtoolbox-3-0-18-8-released/4397
**Category:** Announcements
**Tags:** release
**Created:** [May 2, 2022, 7:46pm UTC](https://psychtoolbox.discourse.group/t/psychtoolbox-3-0-18-8-released/4397 "2022-05-02T19:46:02Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![mariokleiner](https://avatars.discourse-cdn.com/v4/letter/m/13edae/32.png) [@mariokleiner](https://psychtoolbox.discourse.group/u/mariokleiner)
#### Post date: [May 2, 2022, 7:46pm UTC](https://psychtoolbox.discourse.group/t/psychtoolbox-3-0-18-8-released/4397/1 "2022-05-02T19:46:02Z")

</div>

Minor bug fixes / compatibility improvements, mostly to make Ubuntu 22.04-LTS  
“Jammy Jellyfish” as beginner friendly as possible.

## Linux

- Detect if the Screen() function (for X11/GLX Linux) is executed under a Wayland based desktop GUI, which would run it under XWayland, which would end badly. Warn user, error abort with troubleshooting tips → Logout and login into a X11/Xorg native X-Server session. This to deal with the new default choice of a Wayland-based desktop environment under Ubuntu 22.04-LTS,  
which leads to “failure by default”.

## Windows

- Improve postinstall routine to skip sync tests while rebuilding the fontconfig cache on Window or macOS, as sync failure could cause a false error and failure to rebuild the fontconfig cache. Spotted on Windows, but may also apply to macOS.

Enjoy!  
-mario