Hi Corentin,
於 三，2012-06-13 於 09:32 +0200，Corentin Chary 提到：
> Instead of using directly acpi_video_unregister(), use
> acpi_video_dmi_promote_vendor() (and make it call
> acpi_video_unregister() if needed)
>
> Signed-off-by: Corentin Chary <corentin.chary@xxxxxxxxx>
> ---
> drivers/platform/x86/acer-wmi.c | 16 +++++++++-------
> drivers/platform/x86/apple-gmux.c | 6 ++++++
> drivers/platform/x86/samsung-laptop.c | 22 ++++++++++++----------
> 3 files changed, 27 insertions(+), 17 deletions(-)
>
> diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c
> index ce875dc..ffc53df 100644
> --- a/drivers/platform/x86/acer-wmi.c
> +++ b/drivers/platform/x86/acer-wmi.c
> @@ -2060,14 +2060,16 @@ static int __init acer_wmi_init(void)
>
> set_quirks();
>
> + if (dmi_check_system(video_vendor_dmi_table))
> + acpi_video_dmi_promote_vendor();
> if (acpi_video_backlight_support()) {
> - if (dmi_check_system(video_vendor_dmi_table)) {
> - acpi_video_unregister();
> - } else {
> - interface->capability &= ~ACER_CAP_BRIGHTNESS;
> - pr_info("Brightness must be controlled by "
> - "acpi video driver\n");
> - }
> + interface->capability &= ~ACER_CAP_BRIGHTNESS;
> + pr_info("Brightness must be controlled by acpi video driver\n");
> + } else {
> +#ifdef CONFIG_ACPI_VIDEO
The 'ifdef CONFIG_ACPI_VIDEO' didn't work on my machine with v3.4
kernel, the acpi video didn't unregister.
My autoconf.h like following:
include/generated/autoconf.h:#define CONFIG_ACPI_VIDEO_MODULE 1
Need use:
-#ifdef CONFIG_ACPI_VIDEO
+#if (defined CONFIG_ACPI_VIDEO || defined CONFIG_ACPI_VIDEO_MODULE)
pr_info("Disabling ACPI video driver\n");
acpi_video_unregister();
#endif
I tested the above change works to me.
Thanks a lot!
Joey Lee
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