Desktop wallpaper appears to use smallest monitor's resolution after reboot

Bug #1354805 reported by furnace
6
This bug affects 1 person
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Unity
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Undecided
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unity (Ubuntu)
New
Undecided
Unassigned

Bug Description

I have two monitors, one 1440x900, the other 1920x1200.

When I boot my computer up (I am using 14.04.1 LTS, everything up-to-date), I get a low-resolution wallpaper on my larger monitor. My smaller monitor looks fine. I suspect that it is creating a small wallpaper and scaling it up for the large monitor, rather than a large wallpaper and scaling it down for the small monitor.

If I right click the desktop and choose "Change Desktop Background", then change Zoom to Centre, then change back from Centre to Zoom, it fixes the issue until next restart.

Please see attached screenshots. View it at 1:1 / full resolution and compare the right hand monitor in poor-res.png with high-res.png.

I have attached the full size image along with the dialogue where I'm switching from Zoom->Centre->Zoom when I want to boot and pretend I'm in Canada ;-P

https://www.dropbox.com/s/e9ev24f2wziyqkg/images.tar.gz

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