Shih-Yuan; the "ubiquity_hidpi.patch" patch you attached doesn't seem to be directly related to HiDPI support. Maybe I'm misreading, but those seem to be nothing more than some of the changes that aren't yet in Trusty.
As for the changes to unity-settings-daemon, I can only let you finish those since there seemed to be some logic missing to properly calculate the scaling factor. Have you considered Sebastien's option of applying the gtk scaling factor directly from u-s-d if we can't detect unity in the session? I'll make the ubiquity task Incomplete for now; I'm not saying we can't apply the changes in your patch, but I just couldn't see the relation with HiDPI scaling. ** Changed in: ubiquity (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to unity-settings-daemon in Ubuntu. https://bugs.launchpad.net/bugs/1382291 Title: Account creation during first boot of an OEM image needs to scale based on resolution Status in OEM Priority Project: Confirmed Status in OEM Priority Project trusty series: Confirmed Status in ubiquity package in Ubuntu: Incomplete Status in unity-settings-daemon package in Ubuntu: Confirmed Status in ubiquity source package in Trusty: Confirmed Status in unity-settings-daemon source package in Trusty: Confirmed Bug description: [Impact] The ubiquity window size display in HiDPI screens is small. The new gSettings to scale GTK applications (and their corresponding settings in System Settings) work great, but this does not help for the account creation (first boot) for users buying a pre-install system. We would need changes in Ubiquity to: * Probe the monitor to get resolution information * Re-scale the ubiquity window using the corresponding gsetting (com.ubuntu.user-interface scale-factor) based on resolution We would need the changes to be backported to Trusty as well. [Test Case] 1. Install image on a system with HiDPI panel 2. Check the ubiquity window size displayed on screen Expected Result: The window size should be reasonable for user to read the content. Actual Result: The window size is small and user is hard to read the content. To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1382291/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp