Review Request 127656: Verify rotation when updating screen size in XRandR backend

[Pieterjan Camerlynck]

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(Updated Jan. 20, 2017, 10:40 p.m.)


Status
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This change has been marked as submitted.


Review request for Solid, Àlex Fiestas, Daniel Vrátil, and Sebastian Kügler.


Bugs: 356228
    http://bugs.kde.org/show_bug.cgi?id=356228


Repository: libkscreen


Description
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When rotating a single screen to portrait and back to landscape, the XRandR screen size is not updated.

When for example rotating a display of 1920x1080 portrait, the screen size is changed to 1080x1920. XRandR::screenChanged() however is called with rotation = 90 and size = 1920x1080. So the screen size stored internally remains 1920x1080, instead of being updated to 1080x1920.
When you then rotate the screen back to landscape, it checks the new screen size (1920x1080) against the stored (1920x1080) and does not update the screen size (which is at this point 1080x1920).

This should solve https://bugs.kde.org/show_bug.cgi?id=356228 which has photos of the incorrect behavior.


Diffs
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  backends/xrandr/xrandr.cpp a11b708059e8d1de9a67ca7846ae2e633fb1deee 

Diff: https://git.reviewboard.kde.org/r/127656/diff/


Testing
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- Rotate single screen to portrait and back to landscape
- Rotate one screen of dual head to portrait and back
- Rotate both screens of a dual head setup to portrait and back


Thanks,

Pieterjan Camerlynck

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