Asus U31SD
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This wiki is intended to help to fix problems related to Ubuntu and the Asus U31SD laptop. Apart from the following fixes, the Asus U31SD laptop works well with Ubuntu 12.04.
These minor fixes have been tested the models below but they should work under other models as well.
Ubuntu 12.04 Beta 2 (Precise Pangolin) on an Asus U31SD-RX260V
Ubuntu 12.04 (Precise Pangolin) on an Asus U31SD-XA1
Ubuntu 12.04.2 (Precise Pangolin) on an Asus U31SD-XH51
Disclaimer
I make no guarantees, nor take any responsibility for any consequences following the use of this wiki page. Use at your own risk.
Fixing or enabling notebook functionalities
This section will guide you through fixing bug or enable functionalities which don't work out of the box.
Suspend and Hibernate
Warning: The script below simply disables Suspend and Hibernation on U-series models. As of Ubuntu 12.04.2 LTS, suspension is fixed. If the problem still persists, then use the script below.
To fix the suspension and hibernation bug you can use the 20_suspend-ehci-hcd script:
1 #!/bin/sh
2 #
3 # Suspend and Hibernate Fix Script
4 #
5 # Credits: Cuong Tham
6
7 TMPLIST_E=/tmp/ehci-dev-list
8 TMPLIST_X=/tmp/xhci-dev-list
9 E_DIR=/sys/bus/pci/drivers/ehci_hcd
10 X_DIR=/sys/bus/pci/drivers/xhci_hcd
11 E_BIND=$E_DIR""/bind
12 E_UNBIND=$E_DIR""/unbind
13 X_BIND=$X_DIR""/bind
14 X_UNBIND=$X_DIR""/unbind
15
16 unbindDev() {
17 echo -n '' > $1
18 for i in `ls $2 | egrep '[0-9a-z]+\:[0-9a-z]+\:.*$'`; do
19 echo -n "$i" | tee $3
20 echo "$i" >> $1
21 done
22 }
23
24 bindDev() {
25 [ -f $1 ] || return
26
27 for i in `cat $1`; do
28 echo -n "$i" | tee $2
29 done
30
31 rm $1
32 }
33
34 case "${1}" in
35 hibernate|suspend)
36 unbindDev $TMPLIST_E $E_DIR $E_UNBIND
37 unbindDev $TMPLIST_X $X_DIR $X_UNBIND
38 ;;
39 resume|thaw)
40 bindDev $TMPLIST_E $E_BIND
41 bindDev $TMPLIST_X $X_BIND
42 ;;
43 esac
Paste the script in /etc/pm/sleep.d/20_suspend-ehci-hcd and save it
sudo nano /etc/pm/sleep.d/20_suspend-ehci-hcd
The script can have any name, but to ensure the load order, use the prefix 20_
add the execution permission:
sudo chmod 755 /etc/pm/sleep.d/20_suspend-ehci-hcd
To remove the script in case it does not work:
sudo rm /etc/pm/sleep.d/20_suspend-ehci-hcd
suspend-ehci-hcd
Power consumption
I followed the instructions on installing Bumblebee, and after rebooting the computer, the power consumption went down from ~14W to ~8W due to the nVidia 520M discrete GPU is now disabled.
To do this, it was sufficient to add the Bumblebee PPA repository and update it via:
sudo add-apt-repository ppa:bumblebee/stable
sudo apt-get update
Install Bumblebee using the proprietary nvidia driver:
sudo apt-get install bumblebee bumblebee-nvidia linux-headers-generic
Install simple Bumblebee (with only power-saving functionality):
sudo apt-get install --no-install-recommends bumblebee linux-headers-generic
Reboot the computer.
To run certain apps such as heavy 3D programs or games with discrete nVidia GPU (using the proprietary nvidia driver), simply run:
optirun application-name
Reference links: