keyboard laptop buttons no increase display brightness

[Member giuzeta]

hi, the keyboard of this VERY OLD laptop Asus A7CC-7005M doesnt work properly, pressing the FN button and the functions, the decreasing brightness button work, but the increasing brightnes button not work.
its a driver problem or a common antix problem?
thank you

Trying for the first time linux on an old laptop.
I think working to improve performances on old machines is the best way to learn something new, and improve ourself.

[Moderator Brian Masinick]

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Third possibly is that the control is not working properly, either dirty or about to fail.

The possibilities you mentioned may apply; if so, someone who knows more about it can respond. I would look into hardware too. It’s possibly easier to check, especially if it’s clearly working or definitely not working.

It’s not a common antiX problem, if it’s our issue. I’d check hardware then other options unless someone has seen and fixed an antiX issue I’m forgetting.

--
Brian Masinick

[Member Robin]

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First step: Try xev to find out whether the failing key gives any signal.

When entering the xev command into a console window (e.g. roxterm) it should come up with something like:

$ xev
[...]

KeyPress event, serial 38, synthetic NO, window 0x6e00001,
    root 0x6d1, subw 0x0, time 3076714182, (1465,-18), root:(1466,922),
    state 0x0, keycode 29 (keysym 0x7a, z), same_screen YES,
    XLookupString gives 1 bytes: (7a) "z"
    XmbLookupString gives 1 bytes: (7a) "z"
    XFilterEvent returns: False

KeyRelease event, serial 38, synthetic NO, window 0x6e00001,
    root 0x6d1, subw 0x0, time 3076714304, (1465,-18), root:(1466,922),
    state 0x0, keycode 29 (keysym 0x7a, z), same_screen YES,
    XLookupString gives 1 bytes: (7a) "z"
    XFilterEvent returns: False

[...]

Then you just need to find out the proper commands to send for brightness regulation and bind them to the respective key code. You might get a hint how the command is expected to look like from checking the xev output for the working brightness decrease button.

There is another approach option.
You could check whether ACPI services are started:

sudo service --status-all
[-] acpi-support
[-] acpid
...

$ sudo service acpid status
acpid is not running ... failed!

$ sudo service acpi-support status
acpi-support is not running ... failed!

if the services are not running, start them:

$ sudo service acpi-support start
$ sudo service acpid start

maybe the button works already after this, if the brightness is controlled by ACPI on your notebook.

Windows is like a submarine. Open a window and serious problems will start.

[Member mcpderez]

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You could also try the command backlight-brightness which may allow you to use your arrow keys to adjust the brightness. This tool is also available on one of the tabs of the AntiX Control Centre tool.

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