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Issue 840343 link

Starred by 4 users

Issue metadata

Status: Closed
Owner:
Last visit > 30 days ago
Closed: Nov 21
Components:
EstimatedDays: ----
NextAction: ----
OS: Chrome
Pri: 2
Type: Bug



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cros login screen avatars/photos are heavily saturated

Project Member Reported by pawalls@google.com, May 7 2018

Issue description

UserAgent: Mozilla/5.0 (X11; CrOS x86_64 10575.22.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.26 Safari/537.36
Platform: 10575.22.0 (Official Build) dev-channel eve

Steps to reproduce the problem:
1. boot up (or log out of) a cros device
2. add an extra user or two to the device
3. highlight one of the accounts

What is the expected behavior?
The photo for the selected account should be displayed at natural saturation levels and less saturated when de-selected.

What went wrong?
The photo for the selected account has the saturation levels bumped up from the natural de-selected levels.

Did this work before? N/A 

Chrome version: 67.0.3396.26  Channel: beta
OS Version: 10575.22.0
Flash Version:
 
Components: -UI UI>Shell>StartScreen
Owner: zalcorn@google.com
Status: Assigned (was: Unconfirmed)
zalcorn@ please triage
Owner: eddych@chromium.org
+eddych I believe this is due to CABC
eddych@ does not seem to be available, should we find another owner?
Sorry that I missed this bug.  

Yes, the phenomena is related to CABC.  When the majority of screen is dark, we will dim the backlight to save power, resulting in very un-saturated colors, and when screen content gets brighter (e.g. when account is selected) the backlight brightness gets bumped up and the screen content saturation will appear to increase a lot.

We have a separate issue that is related to screen flicker caused by CABC.  The fix will solve both flicker and un-saturated color, and is rolled out to dogfooders.

https://bugs.chromium.org/p/chromium/issues/detail?id=750456#c25


Status: Closed (was: Assigned)
Confirmed that this is due to CABC in the platform and not a UI issue.

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