I can confirm that upgrading libx11-6 to match libx11-xcb1 fixed my issue with chromium. Thanks!
- Bug#979618: chromium freezes on start, triggeri... Lee Garrett
- Bug#979618: marked as done (libx11 possibl... Debian Bug Tracking System
- Bug#979618: Bug#979590: fixed in libx11 2:... Lee Garrett