debcrafters-packages team mailing list archive

[Daniel van Vugt <1971434@xxxxxxxxxxxxxxxxxx>]

I don't think it's totally fixed in 25.04, but it might be for some
people. Because Mutter 48 added some hysteresis to how it handles
display events, so it won't get tricked into waking up as much as
previous releases.

Remember there are also workarounds at the top of this page.

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https://bugs.launchpad.net/bugs/1971434

Title:
  Display powersave only blanks, but does not turn off

Status in GNOME Settings Daemon:
  New
Status in Mutter:
  New
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 ]

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