**Critical Update:** Further debugging has pinpointed the exact level of the failure. Using `sudo udevadm monitor --environment` and `journalctl -f -k`, we can confirm that **no kernel uevent or dmesg/journal message is generated when the laptop is physically folded into tablet mode or back.**
This happens despite the physical Fn-key backlight on the keyboard correctly toggling off and on, which proves the Embedded Controller (EC) is aware of the chassis state change. **Conclusion:** The hardware's Embedded Controller is not signaling the mode change to the kernel in a way that the existing `hp-wmi` or `acpi` drivers can understand. The kernel is completely blind to the event, which is why all higher-level services (`udev`, `iio-sensor-proxy`, GNOME) are not reacting. This appears to be a kernel driver bug where the `hp-wmi` driver needs to be updated to support the specific ACPI/WMI event that this new hardware model uses for its tablet mode switch. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2137359 Title: Automatic screen rotation not working on HP OmniBook X Flip (16-ar0xxx) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/2137359/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
