Further investigation: adding printk's everywhere, I can determine that it
hangs in acpi_enable_subsystem. It prints "Enabling ACPI mode", but doesn't
get to "Installing default handler":
...
/* Enable ACPI mode */
printk("Enabling ACPI mode.\n");
if (!(flags & ACPI_NO_ACPI_ENABLE)) {
ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
"[Init] Going into ACPI mode\n"));
acpi_gbl_original_mode = acpi_hw_get_mode();
status = acpi_enable();
if (ACPI_FAILURE(status)) {
ACPI_WARNING((AE_INFO, "AcpiEnable failed"));
return_ACPI_STATUS(status);
}
}
printk("Installing default handlers.\n");
...
Furthermore, I've flashed my bios to the latest version, and this
problem remains unchanged.
--
[regression] Asus F3Jm fails to work correctly without acpi=off
https://bugs.launchpad.net/bugs/184712
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