If that’s your conclusion from reading this thread, you’ll need to reread it more carefully.
Edit: 18 hours later, the patch with the bug fix for VPixx and CRS visual stimulators on AMD Polaris is now accepted and will be part of an upcoming Linux release (5.19 ~ 5.20). If things don’t go unexpectedly sideways from there on, it will get back-ported/included into some Ubuntu 22.04-LTS Linux 5.15-LTS kernel upgrade within a few weeks or maybe a month or two. For reference:
https://lists.freedesktop.org/archives/amd-gfx/2022-July/081269.html
The advice for AMD Polaris or Vega gpu owners which use CRS or VPixx stimulators/display devices atm. is simply to refrain from upgrading to Ubuntu 22.04 until I give the “all clear”. See this other thread for reference:
"Dithering" with Ubuntu 22.04 / MD Radeon Pro WX 3200 / ViewPIXX - #16 by mariokleiner?
If you don’t intend to use such a CRS/VPixx device, or you have an older card than Polaris, then the problem won’t exist.
If you want to spend some money, I’d rather ask people to buy our paid support licenses to financially support my work. That is money better spent in the mid to long term than on
replacing hw that is almost certainly still perfectly fine for most jobs:
https://www.psychtoolbox.net/#service
People who take part in our user survey will even get a little discount on that license as a thank you.
-mario