Dual monitors unusable with DRI3 on Ivy Bridge
Submitted by John Lindgren
Assigned to Chris Wilson @ickle
Description
Created attachment 126764
X.org log with DRI3
Using Arch Linux x86_64 with:
linux 4.7.4-1
xorg-server 1.18.4-1
xf86-video-intel 1:2.99.917+703+g15c5ff12-1
xfwm4 4.12.3-2
compton 0.1_beta2.5-3
With default settings (no xorg.conf), dual monitors can only be used in "clone" mode. When trying to switch to "extend" mode, the right-hand display freezes and continues to display a snapshot of the cloned display contents at the time of the switch. Using Option "DRI" "2" in xorg.conf is a workaround.
My system is a Dell Latitude E5530 (Core i5 3210m). The left-hand monitor in this case is the laptop display and the right-hand monitor is an Acer external display connected to the docking station with a DVI cable.
Attachment 126764, "X.org log with DRI3":
Xorg.0-DRI3.log