Windows 8.1 offers some great improvements, and we’re already seeing users (particularly Surface Pro users) who are trying the preview.
The preview of Windows 8.1 just came out yesterday, and it’s important to note that it appears to break compatibility with some existing drivers. When you upgrade to 8.1, drivers are not migrated from 8.0, rather they appear to be re-enumerated and re-installed.
The most widespread change appears to be some new driver signing requirements which may cause 3rd party drivers to need an update. Also specific to USB graphics is Windows 8.1 introduces a new WDDM 1.3 graphics model, which requires some additional updates.
Fortunately, DisplayLink appears to be doing a good job of staying ahead of all these changes (they’ve been working with earlier NDA builds, in partnership with Microsoft), and have released their preview driver with support for Windows 8.1 on the same day.
We installed Windows 8.1 when it came out yesterday, and the new DisplayLink driver, and while I’m sure there’s issues there somewhere, all of our quick tests showed good results in a production environment. If you do find any issues, let us know. Or post on DisplayLink’s forum (the link above) to get the feedback directly to them, or comment here.
So for anyone updating to Windows 8.1, please install the DisplayLink 7.4 Preview driver. You can even do this before the upgrade — the 7.4 preview works also on earlier versions of Windows, and when 8.1 does a re-enumeration it will find the driver if you’ve already converted over. A reboot may be required to get things to settle.
Hope that background helps. Thanks for going out of your way for Plugable products!