Rafael,
Do you mean /sys/class/backlight/intel_backlight? It works but acpi_video fails.
We have some cases that needs working acpi_video interfaces. I'd also
like to backport to previous kernels that has not use native backlight
by default
Cheers,
Alex Hung
On Wed, Mar 11, 2015 at 6:20 AM, Rafael J. Wysocki <rjw@xxxxxxxxxxxxx> wrote:
> On Tuesday, March 03, 2015 02:39:14 PM Alex Hung wrote:
>> The brightness hotkeys of HP Pavilion dv6 does not work with Win8 OSI. Due
>> to insufficient documentation for the driver implementation, blacklist
>> it as a workaround.
>
> I gather that the native backlight interface doesn't work on those systems too,
> is that correct?
>
>> Signed-off-by: Alex Hung <alex.hung@xxxxxxxxxxxxx>
>> ---
>> drivers/acpi/blacklist.c | 12 ++++++++++++
>> 1 file changed, 12 insertions(+)
>>
>> diff --git a/drivers/acpi/blacklist.c b/drivers/acpi/blacklist.c
>> index 9b693d5..98aa360 100644
>> --- a/drivers/acpi/blacklist.c
>> +++ b/drivers/acpi/blacklist.c
>> @@ -300,6 +300,18 @@ static struct dmi_system_id acpi_osi_dmi_table[] __initdata = {
>> },
>>
>> /*
>> + * The brightness hotkeys do not work on those machines when
>> + * returning true for _OSI("Windows 2012")
>> + */
>> + {
>> + .callback = dmi_disable_osi_win8,
>> + .ident = "HP Pavilion dv6",
>> + .matches = {
>> + DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
>> + DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion dv6 Notebook PC"),
>> + },
>> + },
>> + /*
>> * BIOS invocation of _OSI(Linux) is almost always a BIOS bug.
>> * Linux ignores it, except for the machines enumerated below.
>> */
>>
>
> --
> I speak only for myself.
> Rafael J. Wysocki, Intel Open Source Technology Center.
--
Cheers,
Alex Hung
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