Laptop Brightness Problem on Toshiba Portege R705-P35

11.04 laptop troubleshooting brightness

2,289

Solution 1

Apparently recent kernels are missing some support for toshiba acpi. There are various patches you can experiment with, discussed here: http://ubuntuforums.org/showthread.php?t=1550219

Solution 2

In 13.04, I found that /sys/class/backlight/toshiba breaks after suspend, but /sys/class/backlight/intel_backlight continues to function (echo $number > backlight after resume from suspend). Some great folks over at Arch have figured this one out. This does the trick:

Source: https://wiki.archlinux.org/index.php/Intel_Graphics#Backlight_not_fully_adjusting.2C_or_adjusting_at_all_after_resume.

Adapting this for Ubuntu 13.04:

sudo vi /etc/default/grub

change the line GRUB_CMDLINE_LINUX_DEFAULT as follows:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"

sudo update-grub
Configure X11 to use the intel_backlight. Create a file called 20-intel.conf here:
```
sudo vi /usr/share/X11/xorg.conf.d/20-intel.conf
```

Paste in the following:

Section "Device"
        Identifier "card0"
        Driver "intel"
        Option "Backlight" "intel_backlight"
        BusID "PCI:0:2:0"

EndSection

6) Reboot and bask in glorious brightness control. Suspend/resume and it continues to function normally from the Fn-F6/F7 keys.

Solution 3

@keks-n (via Launchpad) is hosting a script at his/her PPA that automatically applies toshiba-acpi patch to your kernel. I think it even rebuilds DKMS style if you change kernel (?)

sudo apt-add-repository ppa:keks9n/main && sudo apt-get update && sudo apt-get install toshiba-acpi-fix

Check your toshset settings with:

sudo toshset -q

Full list of toggles:

sudo toshset

I've been running this patch for about a month, but the minor functionality gains (ability to adjust brightness after resume, disable bluetooth, kill backlight) appear to be offset by more frequent system hangs. At least that's my perception.

2,289

chandsie

Updated on September 18, 2022

Comments

chandsie over 1 year

I am currently installed aptana studio 3 beta in ububntu10.10 and now I have a follow problem(this problem doesn't exists in windows).

I want to create(open) project in(from) my local server using Aptane IDE. But I can't access to my local server from Aptana studio.

Is there any advices?

I have an one offer but I don't know linux well and therefore I don't know does this will work: Can I create alias(clone) forlder of my project's parent folder in my computer??And when I change(add new file,edit file) in my computer,that changes automatically will be occuring in server project folder??

Thank's
- n3rd almost 12 years
  
  same issues on Toshiba P835
- chandsie almost 12 years
  
  @n3rd: I have since changed laptops, and I'm sure progress has been made on the issue but the accepted answer helped me fix all my problems.
- Admin about 11 years
  
  Try installing display drivers: askubuntu.com/questions/247145/…
chandsie almost 13 years

hmm, very good resource! Thank you! toshset apparently is installed and already running on my computer however it says that it has some kernel issues, as you pointed out would be the case. I'm going to try out some of the fixes suggested in the forum and see what happens! Thank you again!
Jase_ over 10 years

Cheers. This worked for a Toshiba Portege r90 with Ubuntu 13.10.
jesusiniesta over 9 years

this is the first time i see the backlight control work on mi z930 on Ubuntu (i was able to workaround this on arch). thanks a lot!