[SOLVED] Can't control brightness

[NiteiaTt]

For a week now, I haven't been able to control my laptop's brightness in any way. Pressing Fn + F2/F3 DOES show the brightness gizmo in the screen, but nothing happens. Doing so also changes /sys/class/samsung/brightness, but nothing happens.
I can modify the file manually and nothing happens.
I can try with setpci -s 00:01.1 FA.B=FF and nothing happens.
I'm not sure it's a DE issue, I tried in KDE, Gnome, Cinnamon and nothing happened.
I downgraded linux to a version 2-weeks prior to the day the issue started, and I don't know what's going on.
The only time brightness gets changed is when I suspend to RAM
It gets dimmer, but that's it, I cannot change it.
Something I noticed is that I can only modify /sys/class/samsung/brightness when I am running without X
I boot up in single user mode and I totally can change the brightness altering said file.
But then, again, log in normally and it's out of my hands.
That's a reason to suspect X, but I don't really know
I've tried booting with and without fglrx, no difference.
I don't really know what else to do
I really need help here

My system is a Samsung NP305V4A, using ArchLinux

[rokytnji]

Nice post but you forgot model number of Samsung Netbook/Chromebook/Laptop

Also, I aint sure. But isn't fglrx and newer kernels kinda iffy?

$ inxi -F -z
System:    Host: biker Kernel: 3.7.8-antix.1-486-smp i686 (32 bit) 
           Desktop: Fluxbox 1.3.2 Distro: antiX-13-beta1_386-base Ahmad Sami 8 February 2013
Machine:   System: manda product: Intel powered classmate PC version: Gen 1.5L
           Mobo: N/A model: N/A Bios: American Megatrends version: CM94515A.86A.0024.2008.0715.1716 date: 07/15/2008
CPU:       Single core Intel Core CPU N270 (-HT-) cache: 512 KB flags: (nx pae sse sse2 sse3 ssse3) 
           Clock Speeds: 1: 1600.00 MHz 2: 1600.00 MHz
Graphics:  Card: Intel Mobile 945GSE Express Integrated Graphics Controller 
           X.Org: 1.12.4 drivers: intel (unloaded: fbdev,vesa) Resolution: 1024x600@53.3hz 
           GLX Renderer: Mesa DRI Intel 945GME x86/MMX/SSE2 GLX Version: 1.4 Mesa 8.0.5
Audio:     Card: Intel NM10/ICH7 Family High Definition Audio Controller driver: snd_hda_intel 
           Sound: Advanced Linux Sound Architecture ver: k3.7.8-antix.1-486-smp
Network:   Card: Realtek RTL8101E/RTL8102E PCI Express Fast Ethernet controller driver: r8169 
           IF: eth0 state: down mac: <filter>
Drives:    HDD Total Size: 63.3GB (0.3% used) 1: id: /dev/sda model: KingSpec_KSD size: 63.3GB 
Partition: ID: / size: 8.7G used: 1.7G (21%) fs: ext2 ID: /home size: 50G used: 206M (1%) fs: ext2 
Sensors:   System Temperatures: cpu: 61.0C mobo: N/A 
           Fan Speeds (in rpm): cpu: N/A 
Info:      Processes: 80 Uptime: 2:59 Memory: 220.1/2015.1MB Client: Shell (bash) inxi: 1.8.34 
harry@biker:~
$ apt-cache policy acpi
acpi:
  Installed: 1.6-1
  Candidate: 1.6-1
  Version table:
 *** 1.6-1 0
        500 http://ftp.us.debian.org/debian/ testing/main i386 Packages
        100 /var/lib/dpkg/status

on my eeepc's I use the

Debian -- Details of package eeepc-acpi-scripts in sid

but not sure how Arch handles this with a Samsung.

[NiteiaTt]

Whoops! I knew I forgot something. It's a Samsung NP305V4A Laptop
I've been using Arch in my Samsung for quite a while now, and never gave me any trouble.
I haven't found anything wrong with fglrx
The last time I updated it was 5 days ago...
Wait...
Let me rollback to a previous version

[rokytnji]

Might help. Not sure though.

https://wiki.archlinux.org/index.php/AMD_Catalyst

[NiteiaTt]

Well, how about that...
It seems to be fglrx's fault.
I downgraded the driver from version 13.2-1 to 13.1-1 and I can control brightness again.
How silly of me not to consider that

Thanks to all those who showed interest!