Hi Igor,
On 01/18/2014 09:54 PM, Igor Gnatenko wrote:
From: Aaron Lu aaron.lu@intel.com
Some system's ACPI video backlight control interface is broken and the native backlight control interface should be used by default. This patch sets the use_native_backlight parameter to true for those systems so that video backlight control interface will not be created. To be specific, the ThinkPad T430s/X230/X1 Carbon, Lenovo Yoga 13, Dell Inspiron 7520, Acer Aspire 5733Z and HP ProBook 4340s are added here, if they appear in some other DMI table before, they are removed from there.
Note that the user specified kernel cmdline option will always have the highest priority, i.e. if use_native_backlight=0 is specified and the system is in the DMI table, the video module will not skip registering backlight interface for it.
Thinkpad T430s: Reported-by: Theodore Tso tytso@mit.edu Reported-and-tested-by: Peter Weber bugs@ttyhoney.com Reference: https://bugzilla.kernel.org/show_bug.cgi?id=51231 Thinkpad X230: Reported-and-tested-by: Igor Gnatenko i.gnatenko.brain@gmail.com Reference: https://bugzilla.kernel.org/show_bug.cgi?id=51231 ThinkPad X1 Carbon: Reported-and-tested-by: Igor Gnatenko i.gnatenko.brain@gmail.com Lenovo Yoga 13: Reported-by: Lennart Poettering lennart@poettering.net Reported-and-tested-by: Kevin Smith thirdwiggin@gmail.com Reference: https://bugzilla.kernel.org/show_bug.cgi?id=63811 Dell Inspiron 7520: Reported-by: Rinat Ibragimov ibragimovrinat@mail.ru Acer Aspire 5733Z: Reported-by: sov.info@mail.ru Reference: https://bugzilla.kernel.org/show_bug.cgi?id=62941 HP ProBook 4340s: Reported-and-tested-by: Vladimir Sherenkov a_12300@mail.ru Reference: http://redmine.russianfedora.pro/issues/1258
Signed-off-by: Aaron Lu aaron.lu@intel.com Signed-off-by: Igor Gnatenko i.gnatenko.brain@gmail.com
Thanks for updating this patch.
In the meantime, I plan to make some small modifications to this patch in next revision: 1 remove the win8 OSI check, I've seen win7 laptops that also needs to have only the GPU interface left and checking win8 doesn't make much sense now; 2 add more entries for laptops that appeared in bugzilla recently.