After upgrading my Toshiba Z830 Ultrabook to 12.04 (Precise Pangolin) I noticed that the ability to control the screen back-light was not working using the Toshiba Fn F6/F7 keys.
Thanks to http://www.linlap.com/wiki/acer+aspire+s3 the solution was found quite quickly.
sudo vim /etc/default/grub
This will open the grub configuration file. (Grub is the initial boot selection software)
To be able to dim the screen brightness, You’ve got to modify the line:
GRUB_CMDLINE_LINUX=""
to these two lines:
pcie_aspm=force
GRUB_CMDLINE_LINUX="quiet splash pcie_aspm=force i915.i915_enable_rc6=1 i915.lvds_downclock=1 acpi_osi=Linux acpi_backlight=vendor elevator=noop"
Another neat tip: intel-gpu-tools can be used to control brightness from the commandline.
# will set brightness at 50%
intel_backlight 50
EDIT [2012-08-24]: to avoid issues on resume you need to add a script to the
sudo vim /etc/pm/sleep.d/20_wakeup
Add the following:
#!/bin/bash
case "$1" in
suspend|hibernate)
#do nothing
;;
resume|thaw)
echo 7 > /sys/class/backlight/toshiba/brightness
;;
*)
exit 1
;;
esac
exit 0
Mark the file as executable
sudo chmod +x /etc/pm/sleep.d/20_wakeup
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My install worked without the modification to the grub boot.
Hello. You seems familiar with Ubuntu 12.04 and Toshiba.
I have Toshiba Sattelite something. (Not at the machine at the moment)
I have suspicion all FN functions are off. Worked in 11.10.
Somehow the FN functions are all off. WI-Fi, bluetooth, touchpad.
Wanted to try to fix the FN problem, before trying to fix individual components, as they might be OK, if I could activate them with FN key’s.
Do you have solution for this.?
Best regards.
Jens
@Jens You might have to look at the Toshiba FNFX utilities. I used to have to install them on older Toshy models.
sudo apt-get install fnfxd fnfx-clienthttp://sourceforge.net/projects/fnfx/
HTH !
thanx for your article. we just installed ubuntu 12.04 (32bit i guess) and it works fine, no problems. well except… mobile broadband is painfully slow, fluctuating between 10-100kB/s when downloadig with firefox. thing is, it definitely worked much faster with windows7, in the same location. any ideas?
forgot to mention, it’s some hawei dongle, running through gnome network manager, we didn’t install anything, just default settings.
@Daniel: there is many huawei dongles around. but there is plenty of info on them out there: http://lmgtfy.com/?q=huawei+usb+modem+ubuntu+12.04
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