i'm a new user of slackware
is there is anyone know how to install driver of my graphic card..
I'm using slackware 13 and acer aspire 4741.....

Please give us the output of `lspci | grep -i vga`?

Or better :

lspci -vnn | grep -iA 8 vga

Result of lspci -vnn | grep -iA 8 vga

VGA compatible controller [0300]: Intel Corporation Core Processor Integrated Graphics Controller [8086:0046] (rev 12) (prog-if 00 [VGA controller])
Subsystem: Acer Incorporated [ALI] Device [1025:0370]
Flags: bus master, fast devsel, latency 0, IRQ 26
Memory at f0000000 (64-bit, non-prefetchable) [size=4M]
Memory at d0000000 (64-bit, prefetchable) [size=256M]
I/O ports at 1800 [size=8]
Expansion ROM at <unassigned> [disabled]
Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [d0] Power Management version 2

Orry guys..
the grapich card is alredy installed but i just couldn't change the brightness....