On Sunday, February 22, 2015 01:33:09 PM Jörg Otte wrote: > Starting with kernel 3.19.0-05184-g18320f2, I often find my notebook > running with 'powersave' policy even if it is on AC. > > It turned out that /sys/class/ACAD directory is missing and in the > logs I see: > > ACPI Error: Cannot release Mutex [MUT0], not acquired (20150204/exmutex-376) > ACPI Error: Method parse/execution failed [\_SB_.ACAD._PSR] (Node > ffff880216028d48), AE_AML_MUTEX_NOT_ACQUIRED (20150204/psparse-536) > ACPI Exception: AE_AML_MUTEX_NOT_ACQUIRED, Error reading AC Adapter > state (20150204/ac-131) > > At the last 25 startups since 3.19.0-05184-g18320f2 it occured 13 times. > > It does not occur with kernels older than 3.19.0-05184-g18320f2. Which mainline commit is that? The only changes in 4.0-rc1 that can affect that are the ACPI EC updates IIRC. Is there a chance to try the acpi-ec branch from linux-pm.git and see if the problem is there? Rafael -- 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
