Sierra still broken

[sgniwder]

Originally Posted by Maxime

Just installed 10.12.1 Beta 3 (16B2338c) and I still have the same bug

You can reproduce it by trying to move a workspace from the display link monitor (mission control) to another and then the same from the other monitor.

I went back to 2.5.1 and it is not doing this.

[jared52]

Originally Posted by sgniwder

I went back to 2.5.1 and it is not doing this.

Just downloaded the newest public beta (10.12.1 beta 3), uninstalled the DisplayLink 2.6 driver, installed 2.5.1 and can confirm that the window server crash when dragging windows to and from my DisplayLink display. Was hoping your solution was the right one, but it's still an issue.

[Carlo]

Hi Jared,

Just to confirm, is this in Mission Control? The Window Server crash just by dragging windows is not an issue we have reproduced so far. If in Finder, does this happen with any windows or only with some specific applications or content?

Realistically, we can only bring these bugs to the attention of Apple but if we have a good reproduction we can help them out by pointing them to the failing subsystem.

It's worth noting that the reproducibility of all the Window Server crashes on a specific system can be affected by a new installation of driver and/or operating system update.

Cheers,
Carlo

[shaunvis]

This isn't Mission Control I don't think.

Under trackpad settings, it's called "Swipe between full-screen apps". Although I'm not using apps in full screen mode.

The 4 finger swipe up (Mission Control) seems ok. From there I have multiple desktops on each screen with different apps in each desktop.

Then if I go to a monitor and use the 4 finger swipe to switch between desktops on a monitor, things crash, I get logged out, etc.

[shaunvis]

Just a note, clicking on the apps in the dock to switch between them works fine. It seems to just be the 4 finger swipe to switch desktops. I believe this happens if you change the gesture to use 3 fingers as well.

[Carlo]

Yes that makes sense. With the four finger scroll you are activating a hardware accelerated full screen transition that is triggering the same Window Server issues as the Mission Control problem.
I'm afraid it's essentially the same issue and we can't fix it on our side.

I'm not aware for workarounds to reduce or eliminate this specific graphics effect so the only thing I can do is to update our FAQ and invite you to avoid using this OS feature until it's fixed.
We have bugs in place with Apple for this issue and our recommendation stands: raise the same issue on bugreporter.apple.com to raise its priority.

As a final note, we do understand how annoying is all this. I'm using Sierra and I too can't use my DisplayLink screens properly (and my Canon printer at home).
We are hopeful Apple will not only fix the existing issues but also introduce proper support for third party screens in a future update.
Certainly we are working towards this goal and not giving up on the platform.

Best regards,
Carlo

[jared52]

Originally Posted by shaunvis

This isn't Mission Control I don't think.

Under trackpad settings, it's called "Swipe between full-screen apps". Although I'm not using apps in full screen mode.

The 4 finger swipe up (Mission Control) seems ok. From there I have multiple desktops on each screen with different apps in each desktop.

Then if I go to a monitor and use the 4 finger swipe to switch between desktops on a monitor, things crash, I get logged out, etc.

If I 4 finger swipe up and then try to drag windows from the DisplayLink display, that's when I typically see the crash.