https://bugzilla.kernel.org/show_bug.cgi?id=49481
Summary: Backlight hotkeys do not trigger scancodes on Asus A8F
laptop
Product: ACPI
Version: 2.5
Kernel Version: 3.2.0-32-generic-pae
Platform: All
OS/Version: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: Other
AssignedTo: [email protected]
ReportedBy: [email protected]
Regression: No
Created an attachment (id=84691)
--> (https://bugzilla.kernel.org/attachment.cgi?id=84691)
lspci output
I have an issue with the backlight controls on my Asus A8F laptop. I can
change the brightness with the Fn-keys (Fn+F5/F6 in particular). However, when
changing the brightness with the Fn-keys, no event is triggered in KDE/X and
hence the brightness slider doesn't get adjusted.
I tried monitoring events with xev, but nothing is triggered when I press the
Fn-brightness keys (F5 and F6). Other Fn-keys do trigger events in xev.
Same goes for udev monitoring using
sudo /lib/udev/keymap -i input/event6 - no scancodes from those two
combinations.
Nothing is logged in the dmesg when I do these manipulations.
But I can monitor what happens when I press the keys with acpi_listen:
$acpi_listen
[starting from total bright: press Fn+F5]
hotkey ATKD 0000002e 00000023
hotkey ATKD 0000002d 0000001f
hotkey ATKD 0000002c 0000001e
hotkey ATKD 0000002b 0000001d
hotkey ATKD 0000002a 0000001b
hotkey ATKD 00000029 00000018
hotkey ATKD 00000028 00000017
hotkey ATKD 00000027 00000017
hotkey ATKD 00000026 00000017
hotkey ATKD 00000025 00000015
hotkey ATKD 00000024 00000016
hotkey ATKD 00000023 00000010
hotkey ATKD 00000022 0000000f
hotkey ATKD 00000021 0000000e
hotkey ATKD 00000020 00000055
[nearly total dark now: press Fn+F6]
hotkey ATKD 00000011 0000000d
hotkey ATKD 00000012 0000000e
hotkey ATKD 00000013 0000000f
hotkey ATKD 00000014 00000010
hotkey ATKD 00000015 00000017
hotkey ATKD 00000016 00000015
hotkey ATKD 00000017 00000017
hotkey ATKD 00000018 00000017
hotkey ATKD 00000019 00000017
hotkey ATKD 0000001a 00000018
hotkey ATKD 0000001b 0000001b
hotkey ATKD 0000001c 0000001d
hotkey ATKD 0000001d 0000001e
hotkey ATKD 0000001e 0000001f
hotkey ATKD 0000001f 000001c0
[total bright again]
I have also tried this with a newever kernel (on live USB, Kubuntu 12.10), but
there the problem exists as well.
Please let me know how I can help to fix this bug.
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