There's also some indications this may be related to 4k monitors as well; my original crash with the ThinkPad Dock and Ubuntu's 4.4.0 kernel was a FullHD monitor, later tests with 4.6 and 4.7 were all with a 4k DP 1.2 monitor. I'll have to test again with the dock and a non-4k monitor once I get my hands on it.
I found a couple existing bugs in the freedesktop.org tracker that might be related, all marked as fixed in recent nightlies:
https:/ /bugs.freedeskt op.org/ show_bug. cgi?id= 96714 /bugs.freedeskt op.org/ show_bug. cgi?id= 95498 /bugs.freedeskt op.org/ show_bug. cgi?id= 94822 /bugs.freedeskt op.org/ show_bug. cgi?id= 89055
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There's also some indications this may be related to 4k monitors as well; my original crash with the ThinkPad Dock and Ubuntu's 4.4.0 kernel was a FullHD monitor, later tests with 4.6 and 4.7 were all with a 4k DP 1.2 monitor. I'll have to test again with the dock and a non-4k monitor once I get my hands on it.