http://bugzilla.kernel.org/show_bug.cgi?id=14733
Summary: Oops: ACPI: EC: input buffer is not empty, aborting
transaction
Product: ACPI
Version: 2.5
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: EC
AssignedTo: [email protected]
ReportedBy: [email protected]
Regression: No
First of all kernels before 2.6.32 did not observe anything like that.
All necessary information about my hardware is here
http://ru.gentoo-wiki.com/wiki/Acer_Aspire_5730ZG
In sys-kernel/vanilla-sources-2.6.32 and sys-kernel/gentoo-sources-2.6.32 after
loading the same symptoms: in the first place is not working brightness control
for display; second in dmesg watch spam
"ACPI: EC: input buffer is not empty, aborting transaction"
"ACPI Error (psparse-0537): Method parse/execution failed [\_SB_.AMW0.WMCA]
(Node ffff8800bbc3f3e0), AE_TIME
ACPI: EC: input buffer is not empty, aborting transaction
ACPI Exception: AE_TIME, Returned by Handler for [EmbeddedControl]
(20090903/evregion-424)"
the third is markedly reduced performance.
the spam in dmesg is very similar to this error
http://bugzilla.kernel.org/show_bug.cgi?id=13689
all-info* includes output of
/usr/src/linux/scripts/ver_linux; cat /proc/cmdline; cat /proc/cpuinfo; cat
/proc/modules; cat /proc/ioports; cat /proc/iomem; lspci -vvv; cat
/proc/scsi/scsi
The solution was CONFIG_PM_RUNTIME = y
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