http://bugzilla.kernel.org/show_bug.cgi?id=12243
Summary: eeepc_laptop takes > 1sec to initialize on a eee pc 901
Product: ACPI
Version: 2.5
KernelVersion: 2.6.28.rc7 /
head=1bda71282ded6a2e09a2db7c8884542fb46bfd4f
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Platform-Drivers
AssignedTo: [email protected]
ReportedBy: [email protected]
snaps from dmidecode:
BIOS Information
Vendor: American Megatrends Inc.
Version: 1301
Release Date: 08/05/2008
System Information
Manufacturer: ASUSTeK Computer INC.
Product Name: 901
Version: x.x
Serial Number: EeePC-1234567890
UUID: 00B6CA08-553D-DD81-2747-00221519B97E
Wake-up Type: Power Switch
SKU Number: 90OAM0BB73111131U201Q
Family: To Be Filled By O.E.M.
dmesg consistently confirms slow boot times:
[ 0.275412] eeepc: Eee PC Hotkey Driver
[ 1.311214] eeepc: Hotkey init flags 0x41
[ 1.314479] eeepc: Get control methods supported: 0x101713
debugging the code of the driver, the code basically halts at
eeepc_hotkey_check():
if (write_acpi_int(ehotk->handle, "INIT", ehotk->init_flag, &buffer)) {
which is a wrapper to:
215 static int write_acpi_int(acpi_handle handle, const char *method, int val,
216 » » » struct acpi_buffer *output)
217 {
218 » struct acpi_object_list params;
219 » union acpi_object in_obj;
220 » acpi_status status;
221
222 » params.count = 1;
223 » params.pointer = &in_obj;
224 » in_obj.type = ACPI_TYPE_INTEGER;
225 » in_obj.integer.value = val;
226
227 » status = acpi_evaluate_object(handle, (char *)method, ¶ms,
output);
228 » return (status == AE_OK ? 0 : -1);
229 }
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