Acer Aspire TimelineX 4820TG

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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

[root@arp arp]# lspci

00:00.0 Host bridge: Intel Corporation Core Processor DRAM Controller (rev 12)
00:01.0 PCI bridge: Intel Corporation Core Processor PCI Express x16 Root Port (rev ff)
00:02.0 VGA compatible controller: Intel Corporation Core Processor Integrated Graphics Controller (rev 12)
00:16.0 Communication controller: Intel Corporation 5 Series/3400 Series Chipset HECI Controller (rev 06)
00:1a.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05)
00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio (rev 05)
00:1c.0 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 1 (rev 05)
00:1c.5 PCI bridge: Intel Corporation 5 Series/3400 Series Chipset PCI Express Root Port 6 (rev 05)
00:1d.0 USB Controller: Intel Corporation 5 Series/3400 Series Chipset USB2 Enhanced Host Controller (rev 05)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev a5)
00:1f.0 ISA bridge: Intel Corporation Mobile 5 Series Chipset LPC Interface Controller (rev 05)
00:1f.2 SATA controller: Intel Corporation 5 Series/3400 Series Chipset 4 port SATA AHCI Controller (rev 05)
00:1f.3 SMBus: Intel Corporation 5 Series/3400 Series Chipset SMBus Controller (rev 05)
00:1f.6 Signal processing controller: Intel Corporation 5 Series/3400 Series Chipset Thermal Subsystem (rev 05)
01:00.0 VGA compatible controller: ATI Technologies Inc Redwood [Radeon HD 5600 Series] (rev ff)
01:00.1 Audio device: ATI Technologies Inc Redwood HDMI Audio [Radeon HD 5600 Series] (rev ff)
02:00.0 Ethernet controller: Atheros Communications AR8151 v1.0 Gigabit Ethernet (rev c0)
03:00.0 Network controller: Broadcom Corporation BCM43225 802.11b/g/n (rev 01)
7f:00.0 Host bridge: Intel Corporation Core Processor QuickPath Architecture Generic Non-core Registers (rev 02)
7f:00.1 Host bridge: Intel Corporation Core Processor QuickPath Architecture System Address Decoder (rev 02)
7f:02.0 Host bridge: Intel Corporation Core Processor QPI Link 0 (rev 02)
7f:02.1 Host bridge: Intel Corporation Core Processor QPI Physical 0 (rev 02)
7f:02.2 Host bridge: Intel Corporation Core Processor Reserved (rev 02)
7f:02.3 Host bridge: Intel Corporation Core Processor Reserved (rev 02)

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 control switchable graphics using Linux kernel based ACPI calls, install acpi_call from AUR.

[root@arp arp]# aurget --deps -Sy --nodiscard --noedit acpi_call-git

Load corresponding module automatically while booting. Update /etc/rc.conf

MODULES=(acpi_call)

Init script for switching off the Radeon card -

[root@arp arp]# cat /etc/rc.d/radeon_off 
#!/bin/bash

. /etc/rc.conf
. /etc/rc.d/functions

case "$1" in

   start)
   echo '\_SB.PCI0.P0P2.PEGP._OFF' > /proc/acpi/call
   ;;

   stop)
   echo '\_SB.PCI0.P0P2.PEGP._ON' > /proc/acpi/call
   ;;

   restart)
     stat_busy "Restarting radeon_off ..."
     $0 stop
     $0 start
     stat_done
   ;;

   *)
     echo "usage: $0 {start|stop|restart}"
esac

Switch the Radeon off while booting. Update /etc/rc.conf

DAEMONS=(radeon_off)