Created attachment 117820 [details]
xorg log

With latest libdrm git I can't startx due to a segfault shown in attached xorg
log.

dmesg logs several -

amdgpu 0000:01:00.0: bo ffff8800bd34b800 va 0x0000100000-0x0000100400 conflict
with 0x0000100000-0x0000100400

This happens with mesa/drm on commit 

56d8dd6 amdgpu: make vamgr per device v2

On the commit before that -

ffa305d amdgpu: add flag to support 32bit VA address v4

I can startx without error but performance is broken eg. scrolling in xterm
takes about a second to refresh the screen.