[Bug 172261] Brightness keys FN+5 FN+6 not generating acpi events on Asus e200ha laptop

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=172261

Zhang Rui  changed:

   What|Removed |Added

 Status|NEEDINFO|CLOSED
 Resolution|--- |DOCUMENTED

--- Comment #8 from Zhang Rui  ---
First of all, I don't think this is an ACPI bug as there is no ACPI interrupts
when pressing these hotkeys.

Usually, this is a feature gap that some platform specific drivers fail to
catch these events and expose to userspace.
Eventually, some guy may introduce this feature to Linux by reverse engineering
or something else, but I don't know when. And for this issue, the best way is
to raise it to Asus to provide Linux support for this.

Bug closed.

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[Bug 172261] Brightness keys FN+5 FN+6 not generating acpi events on Asus e200ha laptop

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=172261

--- Comment #7 from Zhang Rui  ---
By comparing /proc/interrupts, we can see that there are several differences
after pressing the hotkeys.

-  32:   1521   1805  0  0   IO-APIC   32-fasteoi  
808622C1:00
+  32:   1521   4249  0  0   IO-APIC   32-fasteoi  
808622C1:00

this is the I2C controller, code is drivers/i2c/busses/i2c-designware-platdrv.c

-  34:269 112780  0  0   IO-APIC   34-fasteoi  
808622C1:02
+  34:269 550515  0  0   IO-APIC   34-fasteoi  
808622C1:02

this is the I2C controller, code is drivers/i2c/busses/i2c-designware-platdrv.c

-  45:  12429  48918  0  0   IO-APIC   45-fasteoi  
mmc0
+  45:  12429  58690  0  0   IO-APIC   45-fasteoi  
mmc0

this is the mmc storage, and it has nothing to do with the hotkey

- 166:159  0  0  0  chv-gpio   51  PDEC3393:00
+ 166:400  0  0  0  chv-gpio   51  PDEC3393:00

this is the gpio controller, code is drivers/pinctrl/intel/pinctrl-cherryview.c

- 182:   3375  0  0  0  chv-gpio   11  ELAN0100:00
+ 182:  16695  0  0  0  chv-gpio   11  ELAN0100:00

this is the gpio controller, code is drivers/pinctrl/intel/pinctrl-cherryview.c

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[Bug 172261] Brightness keys FN+5 FN+6 not generating acpi events on Asus e200ha laptop

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https://bugzilla.kernel.org/show_bug.cgi?id=172261

--- Comment #6 from g...@flydando.com ---
Created attachment 239891
  --> https://bugzilla.kernel.org/attachment.cgi?id=239891=edit
after pressing - grep . /sys/firmware/acpi/interrupts/*

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[Bug 172261] Brightness keys FN+5 FN+6 not generating acpi events on Asus e200ha laptop

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https://bugzilla.kernel.org/show_bug.cgi?id=172261

--- Comment #5 from g...@flydando.com ---
Created attachment 239881
  --> https://bugzilla.kernel.org/attachment.cgi?id=239881=edit
after pressing - cat /proc/interrupts

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[Bug 172261] Brightness keys FN+5 FN+6 not generating acpi events on Asus e200ha laptop

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https://bugzilla.kernel.org/show_bug.cgi?id=172261

--- Comment #4 from g...@flydando.com ---
Created attachment 239871
  --> https://bugzilla.kernel.org/attachment.cgi?id=239871=edit
before pressing - grep . /sys/firmware/acpi/interrupts/*

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[Bug 172261] Brightness keys FN+5 FN+6 not generating acpi events on Asus e200ha laptop

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https://bugzilla.kernel.org/show_bug.cgi?id=172261

--- Comment #3 from g...@flydando.com ---
Created attachment 239861
  --> https://bugzilla.kernel.org/attachment.cgi?id=239861=edit
before pressing - cat /proc/inturrupts

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[Bug 172261] Brightness keys FN+5 FN+6 not generating acpi events on Asus e200ha laptop

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=172261

Zhang Rui  changed:

   What|Removed |Added

 Status|NEW |NEEDINFO
 CC||rui.zh...@intel.com

--- Comment #2 from Zhang Rui  ---
please attach the output of "cat /proc/interrupts" and "grep .
/sys/firmware/acpi/interrupts/*" both before and after pressing the brightness
up/down hotkeys.

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[Bug 172261] Brightness keys FN+5 FN+6 not generating acpi events on Asus e200ha laptop

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=172261

g...@flydando.com changed:

   What|Removed |Added

 CC||g...@flydando.com

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[Bug 172261] Brightness keys FN+5 FN+6 not generating acpi events on Asus e200ha laptop

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=172261

--- Comment #1 from g...@flydando.com ---
As a matter of reference FN+10, FN+11 and FN+12 do all generate events when
using acpi_listen. These keys are mute, vol down and vol up.

acpi_listen output when using the above keys:

gavin@gavin-E200HA:~$ acpi_listen
button/mute MUTE 0080  K
button/volumedown VOLDN 0080  K
button/volumeup VOLUP 0080  K

All other FN keys generate no output. The following is a list of FN keys that
are not working:

FN+1 Sleep
FN+2 Airplane Mode
FN+5 Decrease brightness
FN+6 Increase brightness
FN+7 (Erm .. icon is a box with and X in the middle) Not sure.
FN+8 Switch Displays
FN+9 Disable/enable touchpad

Please let me know if I can provide further information.

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