Difference between revisions of "Acer Aspire TimelineX 4820TG"

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(Sensors: remove useless output)
(Switchable Graphics: remove obsolete init script and useless note)
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[root@arp arp]# echo "DIGD" > /sys/kernel/debug/vgaswitcheroo/switch
 
[root@arp arp]# echo "DIGD" > /sys/kernel/debug/vgaswitcheroo/switch
 
[root@arp arp]# echo "DDIS" > /sys/kernel/debug/vgaswitcheroo/switch
 
[root@arp arp]# echo "DDIS" > /sys/kernel/debug/vgaswitcheroo/switch
</pre>
 
 
Init script for switching off the Radeon card -
 
 
{{Note|There is now a vgaswitcheroo systemd service which should be used instead}}
 
 
<pre>
 
[root@arp arp]# cat /etc/rc.d/radeon_off
 
 
#!/bin/bash
 
 
. /etc/rc.conf
 
. /etc/rc.d/functions
 
 
case "$1" in
 
 
  start)
 
  echo "DIGD" > /sys/kernel/debug/vgaswitcheroo/switch
 
  echo "OFF"  > /sys/kernel/debug/vgaswitcheroo/switch
 
  ;;
 
 
  stop)
 
  echo "DIGD" > /sys/kernel/debug/vgaswitcheroo/switch
 
  echo "DDIS" > /sys/kernel/debug/vgaswitcheroo/switch
 
  ;;
 
 
  restart)
 
    stat_busy "Restarting radeon_off ..."
 
    $0 stop
 
    $0 start
 
    stat_done
 
  ;;
 
 
  *)
 
    echo "usage: $0 {start|stop|restart}"
 
esac
 
 
[root@arp arp]# chmod +x /etc/rc.d/radeon_off
 
</pre>
 
 
Switch the Radeon off while booting. Add following at the end of the file : [[Rc.sysinit|/etc/rc.sysinit]]
 
<pre>
 
#Switch-off discrete graphics
 
/etc/rc.d/radeon_off restart
 
 
/bin/dmesg >| /var/log/dmesg.log
 
 
</pre>
 
</pre>
  

Revision as of 13:55, 20 January 2018

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Reason: Does not comply with Help:Style and Category:Laptops guidelines. (Discuss in Talk:Acer Aspire TimelineX 4820TG#)

Acer Aspire TimelineX 4820TG is a 14-inch laptop that packs in an Intel Core i5-430M processor and dedicated ATI Radeon HD 5650 graphics, making it a powerful 14-inch laptop. ArchLinux works mostly works out of box, but there are few tweaks required to make the hardware fully compatible with ArchLinux.

Hardware

Make sure that you have BIOS_Acer_1.25_A_A.zip installed.

PowerSmart / Battery Optimization

Switchable Graphics

This laptop contains inbuilt Intel HD & Radeon 5650 graphics adapters. The Intel HD graphics adapter is optimized for low power consumption which Radeon 5650 consumes high power.

To use Linux kernel's "Laptop Hybrid Graphics - GPU switching support" add following to /etc/fstab

none            /sys/kernel/debug debugfs defaults 0 0

This will enable /sys/kernel/debug/vgaswitcheroo/switch

[root@arp arp]# cat /sys/kernel/debug/vgaswitcheroo/switch
0:IGD:+:Pwr:0000:00:02.0
1:DIS: :Pwr:0000:01:00.0

IDN - denotes integrated Intel graphics. DIS - denotes discrete Radeon graphics.

To switch-off Radeon, do following -

[root@arp arp]# echo "DIGD" > /sys/kernel/debug/vgaswitcheroo/switch
[root@arp arp]# echo "OFF"  > /sys/kernel/debug/vgaswitcheroo/switch
[root@arp arp]# cat /sys/kernel/debug/vgaswitcheroo/switch
0:IGD:+:Pwr:0000:00:02.0
1:DIS: :Off:0000:01:00.0

To switch-on both graphics chips, do following -

[root@arp arp]# echo "DIGD" > /sys/kernel/debug/vgaswitcheroo/switch
[root@arp arp]# echo "DDIS" > /sys/kernel/debug/vgaswitcheroo/switch

Enable CPU Frequency Scaling

Enabled by default, see CPU frequency scaling for details.

Power Usage

The power rating before tweak -

Power usage (ACPI estimate): 24.1W (2.8 hours)

The power rating after "switching off the radeon graphics" and "enabling laptop-mode tools".

Power usage (ACPI estimate): 11.1W (6.5 hours)

Sensors

Install lm_sensors.

Synaptics Touchpad

See Touchpad Synaptics.