Comment 4 for bug 1579678

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Sebastien Bacher (seb128) wrote : Re: ubuntu unity workspace switcher state reset after screen lock

Thanks, that looks similar to bug #1295267

Could you try to do a fresh boot, log in, lock screen, unlock and attach the Xorg.0.log to the bug?

The logs reported have snippets like

"[ 18.916] (II) intel(0): resizing framebuffer to 3840x1080
[ 18.932] (II) intel(0): switch to mode 1920x1080@60.0 on HDMI2 using pipe 1, position (1920, 0), rotation normal, reflection none
[ 23.688] (II) intel(0): switch to mode 1920x1080@60.0 on HDMI1 using pipe 0, position (1920, 0), rotation normal, reflection none
[ 23.691] (II) intel(0): switch to mode 1920x1080@60.0 on HDMI2 using pipe 1, position (0, 0), rotation normal, reflection none
[ 2239.871] (II) intel(0): resizing framebuffer to 1920x1080
[ 2239.873] (II) intel(0): switch to mode 1920x1080@60.0 on HDMI2 using pipe 0, position (0, 0), rotation normal, reflection none
[ 2240.201] (II) intel(0): resizing framebuffer to 3840x1080"

unsure if that matches an user triggered change or if the monitor config in xorg changes when power saving starts or something