Hi, I have written a WMI module for my Clevo laptop [1] that can accept WMI notifications. This module usually works without issues, but I have rare times where I get weird ACPI warnings *during* suspend (not on resume): [21546.880745] ACPI Error: [_T_1] Namespace lookup failure, AE_ALREADY_EXISTS (20120913/dswload2-330) [21546.880748] ACPI Exception: AE_ALREADY_EXISTS, During name lookup/catalog (20120913/psloop-231) [21546.880753] ACPI Error: Method parse/execution failed [\_SB_.WMI_.WMBB] (Node ffff880232456988), AE_ALREADY_EXISTS (20120913/psparse-536) [21546.880756] clevo_wmi: Failed to execute function 0x1: AE_ALREADY_EXISTS [21546.880757] clevo_wmi: Could not get WMI event number. [21546.900438] PM: suspend of devices complete after 459.769 msecs [21546.900558] PM: late suspend of devices complete after 0.118 msecs [21546.916355] ACPI: Marking method WMBB as Serialized because of AE_ALREADY_EXISTS error The module installs a WMI notifier when loaded. When the notifier callback is called, it calls a WMI method (WMBB) to retrieve the last event number. This last thing is failing as can be seen above. The WMBB method is defined in DSDT which can be found on [2] along with an acpidump and an analysis of WMI events/methods. To me, it seems a locking issue as this issue rarely occurs (3 times in like 2 months). I wonder if I did something wrong? Regards, Peter [1]: https://github.com/Lekensteyn/acpi-stuff/tree/master/clevo-wmi [2]: https://github.com/Lekensteyn/acpi-stuff/tree/master/dsl/Clevo_B7130 -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
