Well unfortunately I was quick to assume. The custom video-amdgpu isn't getting used even though I expected it to be. Instead it seems my fiddling with mesa and drm and a reboot fixed it.
I am currently using the latest stable mesa (11.1.0) and the latest code in the drm repo (d6ffb997263402eebdcb029e061ae0221925f643) Some of the parts from building xorg are also still sitting around but there are too many to really keep track of. The x server seems to be using some of these libraries as well which any number of them could have fixed the issue. I am going to close this issue as I expect the bug is too hard to repeat and a simple fresh install would probably clear things up. ** Changed in: xserver-xorg-video-amdgpu (Ubuntu) Status: Incomplete => Invalid -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-amdgpu in Ubuntu. https://bugs.launchpad.net/bugs/1523197 Title: Segfault at address 0x0 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-amdgpu/+bug/1523197/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp