Messages in this thread | | | Date | Sat, 2 Aug 2008 17:50:54 +0200 (CEST) | From | Sven Wegener <> | Subject | acer-wmi broken in latest git kernel on TravelMate 6492 (Insufficient arguments - method [WQAA]) |
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Hi all,
running Linus' latest (2b12a4c) git kernel, acer-wmi triggers the following ACPI Error on my Acer TravelMate 6492:
acer-wmi: Acer Laptop ACPI-WMI Extras ACPI Error (nseval-0159): Insufficient arguments - method [WQAA] needs 1, found 0 [20080609] acer-wmi: Unable to detect available WMID devices
Reverting commit f3454ae8104efb2dbf0d08ec42c6f5d0fe9225bc (ACPICA: Add argument count checking to control method invocation via acpi_evaluate_object) makes acer_wmi work as before.
Doing a little debugging the call trace starting at acer_wmi_init() is:
WMID_set_capabilities() (called from drivers/misc/acer-wmi.c:1192) wmi_query_block(WMID_GUID2, 1, &out) (called from drivers/misc/acer-wmi.c:747) acpi_evaluate_object(handle, method, NULL, out) (called from drivers/acpi/wmi.c:350) acpi_ns_evaluate(info) (called from drivers/acpi/namespace/nsxfeval.c:258)
Is it a bug in acer-wmi or in Acer's ACPI implementation? I can provide more information as necessary.
Sven
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