Some new Thinkpad has a mute button with led. This mute led can out-of-sync with mute in user interface. This kernel parameter disables the hardware mute and led to avoid confusion. The hotkey will only issue scancode to UI.
Signed-off-by: Alex Hung <[email protected]> --- drivers/platform/x86/thinkpad_acpi.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c index 03ca6c1..adb3a4e 100644 --- a/drivers/platform/x86/thinkpad_acpi.c +++ b/drivers/platform/x86/thinkpad_acpi.c @@ -253,6 +253,9 @@ enum tpacpi_hkey_event_t { #define strlencmp(a, b) (strncmp((a), (b), strlen(b))) +static bool use_hardware_mute = 1; +module_param(use_hardware_mute, bool, 0644); + /**************************************************************************** * Driver-wide structs and misc. variables */ @@ -3327,6 +3330,17 @@ static int __init hotkey_init(struct ibm_init_struct *iibm) if (res) goto err_exit; + if (!use_hardware_mute) { + acpi_handle temp; + + if (!ACPI_SUCCESS(acpi_get_handle(hkey_handle, "SHDA", &temp))) + pr_info("hardware mute interface is not supported\n"); + else { + if (!acpi_evalf(hkey_handle, &status, "SHDA", "dd", 1)) + pr_info("failed to disable hardware mute\n"); + } + } + /* Set up key map */ hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE, GFP_KERNEL); -- 1.8.1.2 -- To unsubscribe from this list: send the line "unsubscribe platform-driver-x86" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
