On 04/24/2012 04:40 PM, Alex Hung wrote:
The tp_features.bright_acpimode will not be set correctly for brightness
control because ACPI_VIDEO_HID will not be located in ACPI. As a result,
a duplicated key event will always be sent. acpi_video_backlight_support()
is sufficient to detect standard ACPI brightness control.
Signed-off-by: Alex Hung<alex.hung@xxxxxxxxxxxxx>
---
drivers/platform/x86/thinkpad_acpi.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/drivers/platform/x86/thinkpad_acpi.c b/drivers/platform/x86/thinkpad_acpi.c
index 7b82868..7d032d5 100644
--- a/drivers/platform/x86/thinkpad_acpi.c
+++ b/drivers/platform/x86/thinkpad_acpi.c
@@ -3405,7 +3405,7 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
/* Do not issue duplicate brightness change events to
* userspace. tpacpi_detect_brightness_capabilities() must have
* been called before this point */
- if (tp_features.bright_acpimode&& acpi_video_backlight_support()) {
+ if (acpi_video_backlight_support()) {
pr_info("This ThinkPad has standard ACPI backlight "
"brightness control, supported by the ACPI "
"video driver\n");
Hi,
I tested the patch on thinkpad x200 and x220, and the brightness up/down
key presses will no longer generate a duplicated event, i.e. output from
"sudo showkey".
Best Regards,
Alex Hung
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