Ubuntu
unity-settings-daemon package

Some PCs still turn off the backlight by zero brightness even when the maximum brightness level is less than 100

Bug #1691032 reported by Shih-Yuan Lee
8
This bug affects 1 person
Affects Status Importance Assigned to Milestone
OEM Priority Project
Triaged
Medium
Unassigned
Xenial
Triaged
Medium
Unassigned
Unity Settings Daemon
Confirmed
Wishlist
unity-settings-daemon (Ubuntu)
New
Undecided
Unassigned

Bug Description

Need to have fix in Bionic, better to have it in xenial.

The minimum brightness of the laptop screen panel may not be realistic sometimes especially when having a problematic screen panel.

For example, Dell Precision 5720 AIO only has 9 levels in /sys/class/backlight/intel_backlight/max_brightness because the wrong settings in VBIOS. It is an all-in-one desktop PC and there is no brightness hotkey to control the backlight. When we set 0 to /sys/class/backlight/intel_backlight/brightness, it turns off the panel's backlight and there is no way to brightness up the backlight again so we can only avoid using 0 as the minimum backlight level.

See original description
Revision history for this message
Shih-Yuan Lee (fourdollars) wrote :

This patch is for gnome-settings-daemon, but it has been rejected by Bastien Nocera [gnome-settings-daemon developer].

Yuan-Chen Cheng (ycheng-twn)
Changed in oem-priority:
status: New → Confirmed
Bug Watch Updater (bug-watch-updater)
Changed in unity-settings-daemon:
importance: Unknown → Wishlist
status: Unknown → Confirmed
Revision history for this message
Ubuntu Foundations Team Bug Bot (crichton) wrote :

The attachment "Avoid using zero brightness by settings." seems to be a patch. If it isn't, please remove the "patch" flag from the attachment, remove the "patch" tag, and if you are a member of the ~ubuntu-reviewers, unsubscribe the team.

[This is an automated message performed by a Launchpad user owned by ~brian-murray, for any issues please contact him.]

tags: added: patch
Yuan-Chen Cheng (ycheng-twn)
Changed in oem-priority:
importance: Undecided → High
Revision history for this message
Will Cooke (willcooke) wrote : Automatically added comment

Added to Trello: https://trello.com/c/DdHQRncy/20-bug-1691032-some-pcs-still-turn-off-the-backlight-by-zero-brightness-even-when-the-maximum-brightness-level-is-less-than-100

tags: added: desktop-trello-import
tags: removed: desktop-trello-import
Yuan-Chen Cheng (ycheng-twn)
description: updated
Rex Tsai (chihchun)
tags: added: oem-priority
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