Created attachment 5921 disabled `Mirror displays` option In current GIT master there seems to be a regression. When plugging an HDMI cable the `Mirror displays` option is disabled. GIT bisect points me to: >git bisect bad (22224) 835671ad8db9bcaed4ec3d53753b7f9a8b4610a7 is the first bad commit commit 835671ad8db9bcaed4ec3d53753b7f9a8b4610a7 Author: Sean Davis <smd.seandavis@gmail.com> Date: Sat Jan 31 11:31:52 2015 -0500 Fix issues found with cppcheck (Thanks Mario) (Bug 10879) :040000 040000 f3782b2eee70c04f7715a6aa10d8a2ab7b5b3d42 4cbdb493675c1f077dfb1da25cc087eae33f8e3d M dialogs :040000 040000 995180b85348189b33ae73a4b3a1bd4f2ba675a6 f5e0a19760ca4a33b5ae0e681da7ee0976f5935e M xfsettingsd >git bisect bad (22224) returned '0' There was some unexpected impact of this clean-up...
On my side, when plugging a HDMI or VGA cable, I get the Mirror Displays setting *applied*, but the UI setting is not necessarily Mirror Displays. If I switch to another UI setting, nothing happens (until I switch back to Mirror Displays and then to something new). I'll wait for a patch to Liviu's report and see if it fixes what I can observe.
I'm not sure this is actually a bug. While I can reproduce what Liviu describes, much of whether the "Mirror" option is enabled or not (even using the commit predating the one Liviu bisected) for me depends on my actual setup. Hitting "Mirror" doesn't actually enable my external display (or the laptop display if I'm only using the external display). Using the "Extend to the right" option however works fine. When both monitors are enabled before opening the minimal dialog the "Mirror" option is disabled here. So it actually seems like the patch does what it should and prevents the "Mirror" option from being available when it actually doesn't work. Note that the advanced dialog also doesn't allow me to mirror.
Yeah, I agree with Simon, this doesn't look to be a bug after all...
Thanks for checking again, Liviu! Marking as invalid then.