On Sat, May 20, 2017 at 10:02:32PM +0900, Hisao Tanabe wrote: > DELL 27-inch display is connected to ThinkPad 250 via DisplayPort cable, > and DELL 27-inch display is used as primary display. > > After upgrade kernel from 4.10 to 4.11, the DELL 27-inch display is now > recognized as a secondary display. What's primary and secondary? Do you mean X's RandR PrimaryOutput, or the layout, both of which are provided by userspace. I suspect what you mean is that the connectors were relabelled, so the output from before/after xrandr might help to clarify that. -Chris -- Chris Wilson, Intel Open Source Technology Centre _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel