Acer Travelmate 4750

Hardware	PCI/USB ID	Working?
Video		Yes
Ethernet		Yes
Wireless		Yes
Audio		Yes
Touchpad		Yes
Camera		Yes
Card reader		Yes
Function keys		Most work

Installation

Kernel boot parameters

To let kernel bootable, acpi workable, and CPU on demand. These pararmeters should be added into boot loader kernel option (eg. grub).

acpi_osi=Linux intel_pstate=disable

Audio

In order to make integrated speakers work add to /etc/modprobe.d/modprobe.conf:

options snd-hda-intel index=0 model=auto

And to /etc/modprobe.d/sound.conf add:

alias snd-card-0 snd-hda-intel
alias sound-slot-0 snd-hda-intel

Function keys

• support by kernel

* Fn+F3: Toggle Wifi (or use slider on right-bottom corner of keyboard)
* Fn+F6: Toggle back-light to save battery
* Fn+F7: Toggle touchpad
* Fn+Left/Right adjust back-light (XF86MonBrightnessDown/XF86MonBrightnessUp) (add acpi_osi=Linux option on linux boot)

• supported by acpid /etc/acpi/handler.sh

* Fn+F4: Suspend to ram
* Fn+F5 toggle VGA (XF86Display)
* Fn+F8 toggle speaker (XF86AudioMute)
* Fn+Up/Down adjust speaker volume (XF86AudioRaiseVolume/XF86AudioLowerVolume)
* Fn+Home Play/Pause(XF86AudioPlay)
* Fn+PgUp Stop(XF86AudioStop)
* Fn+PgDn Seek back(XF86AudioPrev)
* Fn+End Seek Forward(XF86AudioNext)

# use acpi_listen to check button name, modify /etc/acpi/handler.sh

    #...
    button/sleep)
        case "$2" in
            SLPB|SBTN)
                logger 'SleepButton pressed'
		echo -n mem > /sys/power/state
                ;;
            *)
                logger "ACPI action undefined: $2"
                ;;
        esac
        ;;
    #...
    button/volumeup)
		logger "VOLUP"
		amixer set Master 5%+
		;;
    button/volumedown)
        logger "VOLDN"
		amixer set Master 5%-
		;;
    button/mute)
        logger "MUTE" # still buggy, require 4 times to turn on
		amixer set Master toggle
		amixer set Headphone toggle
		amixer set Speaker toggle
		;;
    cd/play)
        logger "CDPLAY"
		;;
    cd/stop)
        logger "CDSTOP"
		;;
    cd/prev)
        logger "CDPREV"
		;;
    cd/next)
        logger "CDNEXT"
		;;

• keys which can not workable

* 'Euro','$' key