Please uninstall the extension 'toggle-night-li...@cansozbir.github.io' because it seems to be broken, then see if night light works using the normal controls in Settings.
If it still doesn't work after that then it sounds like the problem is: gnome-shell[1269]: Failed to set CRTC gamma: drmModeCrtcSetGamma on CRTC 51 failed: Permission non accordée ** Bug watch added: gitlab.gnome.org/GNOME/mutter/-/issues #1106 https://gitlab.gnome.org/GNOME/mutter/-/issues/1106 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-hwe-5.15 in Ubuntu. https://bugs.launchpad.net/bugs/2025460 Title: night light stopped working Status in linux-hwe-5.15 package in Ubuntu: Incomplete Bug description: Same as #1752680 but happening from cold boot and won't work again after disabling/re-enabling night light. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: gnome-shell 3.36.9-0ubuntu0.20.04.2 ProcVersionSignature: Ubuntu 5.15.0-76.83~20.04.1-generic 5.15.99 Uname: Linux 5.15.0-76-generic x86_64 ApportVersion: 2.20.11-0ubuntu27.27 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: ubuntu:GNOME Date: Fri Jun 30 10:25:21 2023 DisplayManager: gdm3 InstallationDate: Installed on 2020-10-24 (978 days ago) InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423) ProcEnviron: PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=fr_FR.UTF-8 SHELL=/bin/bash RelatedPackageVersions: mutter-common 3.36.9-0ubuntu0.20.04.2 SourcePackage: gnome-shell UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-hwe-5.15/+bug/2025460/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp