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Re: [PATCH] thinkpad_acpi: Add support for keyboard backlight

From Johannes Stezenbach <js@sig21.net>
Newsgroups linux.kernel
Subject Re: [PATCH] thinkpad_acpi: Add support for keyboard backlight
Date 2016-01-11 22:20 +0100
Message-ID <qPS2D-7X2-23@gated-at.bofh.it> (permalink)
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On Mon, Jan 11, 2016 at 09:03:01PM +0100, Pali Rohár wrote:
> On Monday 11 January 2016 20:28:00 Henrique de Moraes Holschuh wrote
> > The two features are not the same (and are handled differently by the
> > firmware, for whatever reason), although they do serve the same
> > purpose. I don't think a thinkpad will ever have both features at
> > the same time, so I have no idea why they changed the firmware
> > interface.
...
> And more important, I was told that ThinkPad x230 comes in variant with 
> both ThinkLight (that LED upper the display) and keyboard backlight 
> (under they keyboard).

I can confirm this, my x230 has both.  FWIW, BIOS hotkey
Fn+Space cycles through off, dim backlight, full backlight
and full thinklight. /sys/class/leds/tpacpi::thinklight/brightness
can be read (showing either 0 or 255) but writes are ignored.
Dito for /proc/acpi/ibm/light.

Johannes

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Re: [PATCH] thinkpad_acpi: Add support for keyboard backlight Pavel Machek <pavel@ucw.cz> - 2016-01-04 21:20 +0100
  Re: [PATCH] thinkpad_acpi: Add support for keyboard backlight Pali Rohár <pali.rohar@gmail.com> - 2016-01-04 21:30 +0100
    Re: [PATCH] thinkpad_acpi: Add support for keyboard backlight Pali Rohár <pali.rohar@gmail.com> - 2016-01-04 21:50 +0100
  Re: [PATCH] thinkpad_acpi: Add support for keyboard backlight Henrique de Moraes Holschuh <hmh@hmh.eng.br> - 2016-01-09 18:40 +0100
    Re: [PATCH] thinkpad_acpi: Add support for keyboard backlight Henrique de Moraes Holschuh <hmh@hmh.eng.br> - 2016-01-09 18:50 +0100
      Re: [PATCH] thinkpad_acpi: Add support for keyboard backlight Darren Hart <dvhart@infradead.org> - 2016-01-11 20:10 +0100
        Re: [PATCH] thinkpad_acpi: Add support for keyboard backlight Henrique de Moraes Holschuh <hmh@hmh.eng.br> - 2016-01-11 20:30 +0100
          Re: [PATCH] thinkpad_acpi: Add support for keyboard backlight Pali Rohár <pali.rohar@gmail.com> - 2016-01-11 21:10 +0100
            Re: [PATCH] thinkpad_acpi: Add support for keyboard backlight Johannes Stezenbach <js@sig21.net> - 2016-01-11 22:20 +0100
              Re: [PATCH] thinkpad_acpi: Add support for keyboard backlight Henrique de Moraes Holschuh <hmh@hmh.eng.br> - 2016-01-12 17:10 +0100
                Re: [ibm-acpi-devel] [PATCH] thinkpad_acpi: Add support for  keyboard backlight Yves-Alexis Perez <corsac@debian.org> - 2016-01-12 17:30 +0100
                Re: [PATCH] thinkpad_acpi: Add support for keyboard backlight Johannes Stezenbach <js@sig21.net> - 2016-01-12 17:40 +0100
                Re: [PATCH] thinkpad_acpi: Add support for keyboard backlight Henrique de Moraes Holschuh <hmh@hmh.eng.br> - 2016-01-12 19:00 +0100
                Re: [PATCH] thinkpad_acpi: Add support for keyboard backlight Johannes Stezenbach <js@sig21.net> - 2016-01-12 23:10 +0100
                Re: [ibm-acpi-devel] [PATCH] thinkpad_acpi: Add support for keyboard  backlight Kevin Locke <kevin@kevinlocke.name> - 2016-01-12 19:20 +0100
                Re: [ibm-acpi-devel] [PATCH] thinkpad_acpi: Add support for keyboard  backlight Henrique de Moraes Holschuh <hmh@hmh.eng.br> - 2016-01-12 19:30 +0100
                Re: [ibm-acpi-devel] [PATCH] thinkpad_acpi: Add support for keyboard  backlight Kevin Locke <kevin@kevinlocke.name> - 2016-01-12 19:40 +0100
            Re: [PATCH] thinkpad_acpi: Add support for keyboard backlight Henrique de Moraes Holschuh <hmh@hmh.eng.br> - 2016-01-12 17:10 +0100
            Re: [PATCH] thinkpad_acpi: Add support for keyboard backlight Pavel Machek <pavel@ucw.cz> - 2016-01-12 23:00 +0100
              Re: [PATCH] thinkpad_acpi: Add support for keyboard backlight Pali Rohár <pali.rohar@gmail.com> - 2016-01-13 10:00 +0100
                Re: [PATCH] thinkpad_acpi: Add support for keyboard backlight Pavel Machek <pavel@ucw.cz> - 2016-01-13 20:10 +0100
                Re: [PATCH] thinkpad_acpi: Add support for keyboard backlight Pavel Machek <pavel@ucw.cz> - 2016-01-13 20:20 +0100
          Re: [ibm-acpi-devel] [PATCH] thinkpad_acpi: Add support for  keyboard backlight Yves-Alexis Perez <corsac@debian.org> - 2016-01-11 23:50 +0100
          Re: [PATCH] thinkpad_acpi: Add support for keyboard backlight Darren Hart <dvhart@infradead.org> - 2016-01-12 18:00 +0100
            Re: [PATCH] thinkpad_acpi: Add support for keyboard backlight Henrique de Moraes Holschuh <hmh@hmh.eng.br> - 2016-01-12 19:00 +0100

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