[SOLVED] Brightness resets

I am a newbie to arch linux.
I have a laptop in which none of the fucntion keys work(but they worked perfectly in fedora 14 not in 13), plus the brightness resets to 100 after every restart.
The only way I can change brightness is to follow either of the two ways:
1. Use Gnome panel brighness applet(Moving the bar in the applet is really slow/lags, it is the same case with ubuntu 10.10 but not 10.04)
2. Use this command(Here I used 0 as my brightness):
echo -n 0 > /proc/acpi/video/VGA1/LCD/brightness
So, finally I decided to run this command at every startup so it starts automatically at 0. But I don't know where to put this command. I think I can put this in rc.local or create a startup application in gnome(but none of them worked).
Is there any way to excute this command at startup or make the fucntion key work. Thanks in advance.
Last edited by vikyboss (2011-05-08 02:16:53)

jasonwryan wrote:
vikyboss wrote:Is there any way I can make function key to work. I had this problem with Ubuntu 10.04, 10.10, fedora 13, fedora 14 kde. The only distro that worked out of box, meaning the all my function keys worked pefectly is with Fedora 14.
Yes. You just have to read the wiki https://wiki.archlinux.org/index.php/Ex … board_Keys
Basically, you can make Arch do pretty much anything you want it to with almost all hardware; but you have to do it yourself.
Please look through the excellent documentation the community has provided, try and get things to work yourself and then, if you encounter difficulties, ask here.
Thanks that helped a lot. So, all I have to do is assign functions to my function keys. But as I said before I can execute the echo command with specific brightness specified. But how can I implement them in my two function keys to increase/decrease depending on the two functions key?
Thanks.

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Last edited by PaBre (2014-03-16 17:10:54)

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Last edited by magum (2014-07-30 10:53:51)

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Last edited by magum (2014-06-05 10:39:58)

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Last edited by NekySerbia (2012-03-06 18:32:22)

Something happened and brightness is doing fine now, changing when I want it (except for a known KDE bug). One more thing still bothers me; my hotkeys for brightness are not working.
I opened xev and pressed the combinations, here is the output:
KeyPress event, serial 40, synthetic NO, window 0x1c00001,
root 0xac, subw 0x1c00002, time 470989, (55,54), root:(57,436),
state 0x10, keycode 232 (keysym 0x1008ff03, XF86MonBrightnessDown), same_screen YES,
XLookupString gives 0 bytes:
XmbLookupString gives 0 bytes:
XFilterEvent returns: False
KeyRelease event, serial 40, synthetic NO, window 0x1c00001,
root 0xac, subw 0x1c00002, time 470989, (55,54), root:(57,436),
state 0x10, keycode 232 (keysym 0x1008ff03, XF86MonBrightnessDown), same_screen YES,
XLookupString gives 0 bytes:
XFilterEvent returns: False
KeyPress event, serial 40, synthetic NO, window 0x1c00001,
root 0xac, subw 0x1c00002, time 476305, (55,54), root:(57,436),
state 0x10, keycode 233 (keysym 0x1008ff02, XF86MonBrightnessUp), same_screen YES,
XLookupString gives 0 bytes:
XmbLookupString gives 0 bytes:
XFilterEvent returns: False
KeyRelease event, serial 40, synthetic NO, window 0x1c00001,
root 0xac, subw 0x1c00002, time 476305, (55,54), root:(57,436),
state 0x10, keycode 233 (keysym 0x1008ff02, XF86MonBrightnessUp), same_screen YES,
XLookupString gives 0 bytes:
XFilterEvent returns: False
but nothing happens ;( What can I do to fix this? I can check my brightness level by
cat /sys/class/backlight/acpi_video1/brightness
. There is also 'acpi_video0' but it does nothing.

[Solved]Brightness control doesn`t work anymore

Hi!
I`ve made my 3rd update of Arch since installation, and... where previous two succeeded, the third one failed. It messed up my system
The problem is, i cannot change brightness any more through my function keys (and since i`m using Openbox as my DE, i cannot change it at all ). The brightness now is so low that i can barely see what i am typing. And it is not only in my Arch, it also messed up Windows and everything else: grub, bootup screen where i can select bios properties - everything. I ran xev and now i see that FN+Right/Left are not detected anymore as brightness keys. It says:
FocusOut event, serial 32, synthetic NO, window 0x3200001,
mode NotifyGrab, detail NotifyAncestor
FocusIn event, serial 32, synthetic NO, window 0x3200001,
mode NotifyUngrab, detail NotifyAncestor
KeymapNotify event, serial 32, synthetic NO, window 0x0,
keys: 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
However, FN + Win + Right/Left are now detected as brightness control function keys
KeyRelease event, serial 35, synthetic NO, window 0x3200001,
root 0x13c, subw 0x0, time 521221, (348,-43), root:(1219,884),
state 0x40, keycode 233 (keysym 0x1008ff02, XF86MonBrightnessUp), same_screen YES,
XLookupString gives 0 bytes:
XFilterEvent returns: False
But pressing them doesn`t work either. I thought that it was xfce4-power-manager problem, but changing to gnome-power-manager didn`t help either.During the update pacman also upgraded kernel to latest version.
Any ideas?
P.S. My notebook is Acer Aspire 7720g with Nvidia 8600M GT. I tried solutions from this topic: http://bbs.archlinux.org/viewtopic.php?id=73889 but none worked for me... The problem is that the system is completely unusable at this point, since i barely see anything on the monitor, and that sucks
Last edited by K0tuk (2009-06-27 08:02:56)

I can't see what you did in Arch affecting your windows installation at all. If you try to boot into windows and increase the brightness (since most laptops store the brightness level of the laptop as it was set, on battery, at least my 2 laptops do), does the new brightness level "stick" for all things? If so, the only issue you have is to re-map the function keys properly, and to configure a script or something to increase/decrease lcd brightness. You can make a simple script that echoes a value into your /proc/acpi/video/LCD/brightness file (the file path will vary, so it may be under UVGA or so). If, however, it doesn't increase again, it may very well be a hardware issue, and not a software (since, as I said above, it's highly unlikely that an Arch update has affected Windows in any way).
Last edited by lswest (2009-06-26 12:28:04)

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Last edited by mangus (2011-10-30 16:01:48)

Gusar wrote:
I was gonna tell you to search, but surprisingly the search doesn't find anything, even though I could swear this has been discussed before.
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[SOLVED] Brightness resets

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