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# Acer Travelmate 4750

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This article or section is a candidate for merging with Laptop/Acer#Travelmate.

Notes: Only bad and outdated advice about CPU frequency and audio devices. (Discuss in Talk:Acer Travelmate 4750)

This article or section does not follow the Laptop page guidelines.

Reason: Stub (Discuss in Talk:Acer Travelmate 4750)

This article or section is out of date.

Reason: This page is ancient (Discuss in Talk:Laptop#Old laptop pages)

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

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- Acer

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