Thank you for the feedback — and apologies if the original report came across as a personal preference rather than a serious technical issue. This is my first bug report, and I may not have made the core problem clear enough.
Let me clarify: The issue is not that the system shuts down too early — the issue is that it doesn't shut down at all. When the battery reaches 2% (as per UPower's current default), on laptops with moderate battery wear (in my case ~64% capacity remaining), the voltage often drops too quickly for the system to finish the shutdown or suspend process. The result is not a graceful power-off, but rather: 1. A complete system freeze on boot screen (photo), 2. A blinking Caps Lock LED, which signals a kernel panic, 3. And sometimes filesystem corruption on the next boot due to unclean unmounting. This is not a subjective preference — it's a data integrity and system stability issue. After changing: "PercentageAction=5.0" ...the problem was fully resolved. The system now powers off (or hybrid- sleeps) cleanly and reliably. Raising PercentageAction slightly (e.g., to 5%) makes UPower more robust and fault-tolerant, especially in edge cases like: 1. Battery age or wear, 2. Cold environments (which reduce available charge), 3. Unexpected spikes in CPU/GPU activity that cause battery drop near the end. In effect, this makes UPower safer by design — it prevents machines from entering an unrecoverable freeze state that forces users to hold the power button to force a shutdown, which risks hardware and data. Again, I understand that defaults must work across many hardware scenarios, and I'm glad UPower is configurable. But I hope this helps explain why I believe this change would improve the reliability of Ubuntu systems by preventing critical-level system crashes, even if rare. Thanks again for your time and consideration. ** Attachment added: "H3FAhGPO.jpg" https://bugs.launchpad.net/ubuntu/+source/upower/+bug/2112342/+attachment/5881891/+files/H3FAhGPO.jpg -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2112342 Title: UPower default PercentageAction=2.0 is too aggressive for degraded batteries — suggest changing to 5.0% To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/upower/+bug/2112342/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
