Thanks. I can see the variable was honoured this time: Aug 23 12:42:32 stella gnome-shell[1104]: Added device '/dev/dri/card1' (i915) using non-atomic mode setting. Aug 23 12:42:33 stella kernel: intel ips 0000:00:1f.6: i915 driver attached, reenabling gpu turbo
Strange that kernel message always seems to be present around the same time. I think the next step is to add: MUTTER_DEBUG=kms so we can maybe see why the screen is freezing. Also try MUTTER_DEBUG=kms without MUTTER_DEBUG_ENABLE_ATOMIC_KMS=0. ** Summary changed: - Gnome desktop freeze after kernel update + Screen freezes with kernel 6.8 (also "i915 driver attached, reenabling gpu turbo"), while kernel 6.5 still works -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2077265 Title: Screen freezes with kernel 6.8 (also "i915 driver attached, reenabling gpu turbo"), while kernel 6.5 still works To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-hwe-6.8/+bug/2077265/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs