[Bug 1755490] [NEW] Incorrect information about display shown in gnome/unity-control-center

[Launchpad Bug Tracker]

You have been subscribed to a public bug by Ubuntu Foundations Team Bug Bot (crichton):

[Impact]

 * There is a number of display devices that misuse the width & height field in EDID. Instead of real size in centimeters it contains encoded aspect ratio (e.g. 1600x900, 16x10, 160x90).
This leads to incorrect calculation of diagonal for the purpose of e.g. Unity settings app.

[Test Case]

 1. Connect a display device that provides incorrect EDID data (e.g. LG 49UB850T-DA TV).
 2. Open the Displays section of Unity settings.
 3. Look for the name of the newly connected display in the settings window.

Expected result:
Display name should contain its real diagonal or model name (if dimensions are not availabe).

Actual result:
Display name contains a ridiculous diagonal (e.g. 72" in case of a 49" display).

[Regression Potential]

 * This affects the way the display name will be formatted for any
software using unity-settings-daemon. If anything is testing/comparing
display names - it may fail.

[Other Info]

* Original bug description:

After connecting a LG 49UB850T-DA TV the following information is
displayed in the unity-control-center: Goldstar Company Ltd 72"

It's misleading since neither the company name nor the diagonal matches.

** Affects: hwdata (Ubuntu)
     Importance: Low
         Status: Incomplete

** Affects: unity-settings-daemon (Ubuntu)
     Importance: Low
         Status: Fix Released

** Affects: unity-settings-daemon (Ubuntu Xenial)
     Importance: Undecided
         Status: Fix Committed

** Affects: unity-settings-daemon (Ubuntu Bionic)
     Importance: Low
         Status: Fix Released

** Affects: unity-settings-daemon (Ubuntu Cosmic)
     Importance: Low
         Status: Fix Released


** Tags: patch verification-done verification-done-bionic verification-done-cosmic verification-done-xenial
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Incorrect information about display shown in gnome/unity-control-center
https://bugs.launchpad.net/bugs/1755490
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