** Description changed:
- Recently upgraded to Ubuntu 22.04, and it seems like the power-saving
- feature in Gnome 42 does not actually turn off the screen(s) after X
- minutes, but just blanks them. When I manually run `xset dpms force
- off`, they do properly turn off and go to powersave mode.
+ [ Impact ]
- 1) Description: Ubuntu 22.04 LTS
- Release: 22.04
+ On some machines when the screen blanks, the LCD backlight stays on.
- 2) gnome-settings-daemon:
- Installed: 42.1-1ubuntu2
- Candidate: 42.1-1ubuntu2
+ [ Workarounds (reported to work by some people) ]
- 3) In Settings -> Power -> Screen Blank, set the inactivity period to 5
- minutes. After 5 minutes, the screens should turn off.
+ * Configure the monitor (in its own menus) to not auto-switch inputs.
+ * Change from HDMI to DisplayPort cables.
+ * Disable HDMI audio output.
- 4) Screens go black, but remain active and consume (too much) power.
- ---
- ProblemType: Bug
- ApportVersion: 2.20.11-0ubuntu82
- Architecture: amd64
- CasperMD5CheckResult: unknown
- CurrentDesktop: ubuntu:GNOME
- DistributionChannelDescriptor:
- # This is the distribution channel descriptor for the OEM CDs
- # For more information see
http://wiki.ubuntu.com/DistributionChannelDescriptor
- canonical-oem-somerville-bionic-amd64-20190418-59+beaver-osp1+X00
- DistroRelease: Ubuntu 22.04
- InstallationDate: Installed on 2020-07-04 (667 days ago)
- InstallationMedia: Ubuntu 18.04 "Bionic" - Build amd64 LIVE Binary
20190418-12:10
- Package: gnome-settings-daemon 42.1-1ubuntu2
- PackageArchitecture: amd64
- ProcVersionSignature: Ubuntu 5.15.0-27.28-generic 5.15.30
- Tags: jammy
- Uname: Linux 5.15.0-27-generic x86_64
- UpgradeStatus: Upgraded to jammy on 2022-04-30 (3 days ago)
- UserGroups: adm cdrom dialout dip lpadmin plugdev sambashare sudo vboxusers
video wireshark
- _MarkForUpload: True
+ [ Test Plan ]
+
+ 0. Make sure you're using an LCD (not OLED) so you can see if the backlight
is on.
+ 1. In Settings -> Power -> Screen Blank, set the inactivity period to 1
minute.
+ 2. Verify after 1 minute that the screen is blank and the backlight is also
visibly off.
+
+ [ Where problems could occur ]
+
+ [ Other Info ]
** Tags removed: mantic
** Changed in: gnome-settings-daemon (Ubuntu)
Status: Confirmed => Triaged
** Changed in: mutter (Ubuntu)
Status: Confirmed => Triaged
--
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to gnome-settings-daemon in Ubuntu.
https://bugs.launchpad.net/bugs/1971434
Title:
Display powersave only blanks, but does not turn off
Status in Mutter:
Unknown
Status in gnome-settings-daemon package in Ubuntu:
Triaged
Status in mutter package in Ubuntu:
Triaged
Bug description:
[ Impact ]
On some machines when the screen blanks, the LCD backlight stays on.
[ Workarounds (reported to work by some people) ]
* Configure the monitor (in its own menus) to not auto-switch inputs.
* Change from HDMI to DisplayPort cables.
* Disable HDMI audio output.
[ Test Plan ]
0. Make sure you're using an LCD (not OLED) so you can see if the backlight
is on.
1. In Settings -> Power -> Screen Blank, set the inactivity period to 1
minute.
2. Verify after 1 minute that the screen is blank and the backlight is also
visibly off.
[ Where problems could occur ]
[ Other Info ]
To manage notifications about this bug go to:
https://bugs.launchpad.net/mutter/+bug/1971434/+subscriptions
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