https://bugzilla.kernel.org/show_bug.cgi?id=220505
--- Comment #6 from daniel.zhan...@icloud.com --- (In reply to Artem S. Tashkinov from comment #5) > Ultimately, the EC should not be allowed to stop the fans. > > If the OS can do that, it's a devastating DoS/physical attack that can be > carried out even under Windows. I think there may be a misunderstanding about this laptop's design. This model includes Lenovo Vantage software on Windows that provides legitimate fan control modes (Performance/Quiet/Balanced), suggesting the EC is **intended** to accept OS commands for fan management. The key difference is that Windows works correctly - fans resume normal operation after sleep/wake cycles. The issue appears to be that Linux's suspend/resume process isn't properly restoring the EC's fan control state, rather than the EC being fundamentally insecure. Could this be a Linux kernel issue where we're not properly reinitializing the EC after suspend? Other users with this model have noted that "when the operating system turns them off with a suspend, there's no way of getting them back" on Linux. Should this problem be thought of as a suspend/resume driver issue rather than a fundamental EC security flaw? The EC seems designed for OS cooperation - it just appears that Linux isn't handling the resume process correctly. -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug. _______________________________________________ acpi-bugzilla mailing list acpi-bugzilla@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/acpi-bugzilla
