** Changed in: linux (Ubuntu)
Status: In Progress = Confirmed
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Title:
Various Toshiba laptops - brightness controls work on first boot,
Same problem on Tosihba R930.
Looks like it don't only affects brighness, but after a first sleep/resume , it
won't sleep again or shutdown properly (just shutdown the hard drive but not
the computer)
Do you also have the same issue ?
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Just got a Z930 and cannot change display brightness at all.
Set acpi_backlight=vendor in /etc/default/grub which resulted in
displaying a widget that shows the current setting for display
brightness and the change when I press FN-F6 or FN-F7 but the display
itself remains at full power.
In the recent ubuntu 13.04 Beta 2, /sys/class/backlight/acpi_video0 did
not exist anymore on my toshiba satellite Z930 (acpi_backlight=vendor is
NOT set). Therefore I had to change the udev script proposed by @cmtsij
like this:
diff --git a/etc/udev/rules.d/00-tosh-backlight.rules
Thanks, cmtsij. This is the only solution which works for my Toshiba
Z960 on kernel 3.8.0-16-generic.
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Title:
Various Toshiba laptops -
I try to write a udev script to workaround.
When user press Fn-F6 or Fn-F7, a uevent would be generated from acpi_video0.
I wrote a udev rule to hook this uevent to config intel_backlight brightness.
diff --git a/etc/udev/rules.d/00-tosh-backlight.rules
I am experiencing the same problem. I'm on a Dell XPS ultrabook with the
Dell Sputnik PPAs. In my case, I hibernate the computer (I do not
suspend) bu the symptoms are the same.
Also, after coming back from hibernation, the bluetooth widget shows
that bluetooth is enabled even though I had
This proposed solution worked for me:
### SYSTEM INFO ###
# Model: Toshiba SATELLITE R830
# Kernel: 3.5.0-23-generic x86_64
# OS: Ubuntu 12.10 quantal
### KERNEL PARAMETER ###
$ grep vendor /etc/default/grub
GRUB_CMDLINE_LINUX_DEFAULT=quiet acpi_backlight=vendor
### SCRIPT ###
Toshiba portege M400 here,
3.5.0-21-generic #32-Ubuntu SMP
Brightness keys stop working after suspend/resume, first time. However,
in a departure from others' observed behavior, my
backlight/toshiba/brightness controls work. When the system is running
after a resume, the 'brightness' value is
Comment/link in #57 worked for me on my Portege r705-P25
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Title:
Various Toshiba laptops - brightness controls work on first boot, but
do
I'm experiencing the same bug on my Toshiba R830-13D, running Ubuntu
12.10. The workaround suggested in #57 worked for me.
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Title:
Various
I have the same problem with portege Z930 with quantal (amd64). A
workaround is to do as root
cd /sys/class/backlight/intel_backlight
echo some_value brightness
with some_value an integer lower than 4539.
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I tried the workaround suggested in #57, and it doesn't work on an R840
using Quantal. Not sure if anyone else has had luck on any other laptop
on Quantal.
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Bug still exists under 3.6 rc6. (tested with z930)
** Description changed:
Overview -
This bug affects many Toshiba laptops including R700, R705, R800, R830,
- R835, R840 and R850 models - please update this description if your
+ R835, R840, R850, Z930 models - please update this
I compiled all the latest patches for toshiba_acpi.c but no success.
When this BUG's going to be closed ?
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Title:
Various Toshiba laptops -
I have Toshiba Satellite R630, and this BUG is really bothering.
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Title:
Various Toshiba laptops - brightness controls work on first boot, but
Here is a nice resource of workarounds for toshiba z830:
http://www.linlap.com/wiki/toshiba+portege+z830-10f
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Title:
Various Toshiba laptops -
It's still broken for me.
Running the following pre-release kernel: Linux version
3.4.0-030400-generic (apw@gomeisa) (gcc version 4.4.3 (Ubuntu
4.4.3-4ubuntu5.1) ) #201205210521 SMP Mon May 21 09:22:02 UTC 2012
Obtained from here:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.4-precise/
Oops, I forgot to add the acpi_backlight=vendor kernel parameter. I'm
now seeing the same behavior as everyone else, with the above
configuration.
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Wohoo! I'll give a post 3.3.5 PPA a try when I get a chance, and report
back.
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Title:
Various Toshiba laptops - brightness controls work on
Hiya,
Just confirming that the fix suggested in #50 works in Fedora 16 kernel
3.3.5-2.x86_64, so I'm guessing it'll work in Ubuntu also.
Can't thank you guys enough for exploring this one; been a real headache
for me and I'm nowhere near knowledgeable enough to even begin to
attempt to fix it.
** Summary changed:
- Toshiba R840 - brightness controls work on first boot, but do nothing after
suspend/resume
+ Various Toshiba laptops - brightness controls work on first boot, but do
nothing after suspend/resume to RAM.
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** Description changed:
+ Overview -
+
+ This bug affects many Toshiba laptops including R700, R705, R800, R830,
+ R835, and R840 models - please update this description if your model is
+ also affected, but make sure the symptoms match exactly.
+
+ The symptoms are that brightness control
Seth Jowi, well done on your progress with this bug which I have been
tracking for a while on duplicate reports. Since you have the most
progress on the problem I have merged the various reports into this one
and updated the title description to reflect the various models
affected.
Seth, there
** Changed in: linux
Status: Unknown = Confirmed
** Changed in: linux
Importance: Unknown = Medium
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Title:
Various Toshiba laptops -
** Changed in: debian
Status: Unknown = Confirmed
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Title:
Various Toshiba laptops - brightness controls work on first boot, but
do
Martin: Thanks for gathering all the data.
I'm hesitating on the solution from comment #30 because writing to
HCI_BACKLIGHT seems to sometimes cause the machine to lock up, and
because it's only a partial fix (acpi_video backlight still doesn't
work). I'm hoping we can do better, when I have a
** Bug watch added: Red Hat Bugzilla #755768
https://bugzilla.redhat.com/show_bug.cgi?id=755768
** Also affects: fedora via
https://bugzilla.redhat.com/show_bug.cgi?id=755768
Importance: Unknown
Status: Unknown
** Bug watch added: Novell/SUSE Bugzilla #711339
Launchpad has imported 6 comments from the remote bug at
https://bugzilla.novell.com/show_bug.cgi?id=711339.
If you reply to an imported comment from within Launchpad, your comment
will be sent to the remote bug automatically. Read more about
Launchpad's inter-bugtracker facilities at
Jowi wrote in comment #29:
I tried to work around with the acpi_backlight=vendor kernel parameter. To my
surprise with this parameter set intel_backlight seems to be used behind the
scenes when the Fn-F6/7 keys are pressed. But after resume the backlight stayed
off, hence I don't followed this
Martin: The instructions you linked to work without the HCI_BACKLIGHT
patch to the kernel? Interesting. Have you tried it without passing
acpi_backlight=vendor to see if the acpi backlight works as well? What
about writing values other than 7?
The way that toshiba_acpi currently handles the
Martin: With acpi_backlight=vendor and writing to toshiba/brightness
after resume the backlight actually turns on, but leaves me with an
empty screen. Xorg shows the following log entries:
[ 211.813] (WW) intel(0): flip queue failed: Invalid argument
[ 211.813] (WW) intel(0): Page flip
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