Public bug reported: I'm running the Chromium snap on elementary OS 8, which is configured to automatically switch between light and dark themes as the day goes by.
Chromium is able to change from the dark theme to the light theme, but it fails to switch from light to dark; its window flickers dark for a moment, but it stays light-themed. At this point, Chromium no longer reacts to desktop color changes, and is effectively stuck in light mode. It picks up the expected theme after a restart. To reproduce: 1. Set your desktop to dark mode. 2. Start Chromium and make sure the "Classic" theme is selected, and that "Mode" is set to "Device". If that's set, it should start in dark mode, as expected. 3. Switch your desktop to light mode, and observe how Chromium reacts to the change; then switch to dark mode. 4. When Chromium fails to switch to the dark mode, restart it; it should then start with the expected appearance. 5. With Chromium restarted and in dark mode, switch your desktop to light mode once again; it should work as before, but switching to dark mode will fail again. It's possible that this has nothing to do with the Snap packaging; but without access to a Debian (apt) package, I'm unable to test it. $ uname -a Linux helium 6.14.0-37-generic #37~24.04.1-Ubuntu SMP PREEMPT_DYNAMIC Thu Nov 20 10:25:38 UTC 2 x86_64 x86_64 x86_64 GNU/Linux $ type -a chromium chromium is /snap/bin/chromium $ snap info chromium name: chromium summary: Chromium web browser, open-source version of Chrome publisher: Canonical✓ store-url: https://snapcraft.io/chromium contact: https://bugs.launchpad.net/ubuntu/+source/chromium-browser/+bugs?field.tag=snap license: unset description: | An open-source browser project that aims to build a safer, faster, and more stable way for all Internet users to experience the web. commands: - chromium.chromedriver - chromium services: chromium.daemon: simple, disabled, inactive snap-id: XKEcBqPM06H1Z7zGOdG5fbICuf8NWK5R tracking: latest/stable refresh-date: yesterday at 01:27 -03 channels: latest/stable: 143.0.7499.169 2026-01-05 (3343) 184MB - latest/candidate: 143.0.7499.169 2025-12-20 (3343) 184MB - latest/beta: 144.0.7559.20 2025-12-19 (3340) 185MB - latest/edge: 145.0.7587.4 2026-01-07 (3345) 186MB - installed: 143.0.7499.169 (3343) 184MB - $ echo "$XDG_SESSION_TYPE" wayland $ lsb_release -rd No LSB modules are available. Description: elementary OS 8 Release: 8 Attached outputs: - lspci -v - snap connections chromium - /snap/bin/chromium --enable-logging=stderr ** Affects: chromium-browser (Ubuntu) Importance: Undecided Status: New ** Attachment added: "lspci -v" https://bugs.launchpad.net/bugs/2137676/+attachment/5938145/+files/lspci.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2137676 Title: Fails to switch to Classic dark mode when desktop color mode is changed To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/chromium-browser/+bug/2137676/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
