adding "acpi_backlight=vendor acpi_osi=linux" to grub boot options:
a. fully fixes this problem in a Dell Inspiron 1545 running 14.04 (all
behavior normal and as expected, including indicator popups for brightness
adjustment)
b. partially fixes the problem in a Dell Inspiron 1440 running 12.04
The Fedora fix seems much more elegant and less invasive by simply finding
and eliminating a software keymapping duplicate of hardware/bios activated
keys, if it's the same issue! Maybe it's part of the fix, because the
Inspiron 1545 running 14.04 already has those changes in its
Just FYI:
The bug, which Ubuntu cannot fix for 7 (SEVEN!!!) years, was fixed in Fedora in
1.5 months: https://bugzilla.redhat.com/show_bug.cgi?id=1141525
** Bug watch added: Red Hat Bugzilla #1141525
https://bugzilla.redhat.com/show_bug.cgi?id=1141525
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Is this a HAL problem? It's still a problem in 14.04 LTS...
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Title:
Screen brightness double level changes on Dell laptops
To manage
This release has reached end-of-life [0].
[0] https://wiki.ubuntu.com/Releases
** Changed in: linux (Ubuntu Hardy)
Status: Confirmed = Invalid
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Are you serios? This bug is confirmed in 12.04 and 13.04. It can't be
invalid!
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Title:
Screen brightness double level changes on Dell laptops
To
Ubuntu 12.10.. The bug is still here.
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Title:
Screen brightness double level changes on Dell laptops
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ditto on a Dell Inspiron 1440 -- still here. no workarounds that i know
of
Dell XPS m1330 -- adding acpi_backlight=vendor to grub boot parameters
resolves the issue
ethan
On Mon, Nov 5, 2012 at 8:55 AM, Pavel Malyshev
207...@bugs.launchpad.netwrote:
Ubuntu 12.10.. The bug is still here.
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I think it's not just the brightness, either. It seems to be the
multimedia keys as well. Just trying to pause the music player with
the pause button on my Dell XPS M1330 is very difficult, because
pressing the pause button sends it twice, so the music pauses and
instantly unpauses. If I tap it
Adam, I think you issue with pause/next/prev buttons is something
different. Because everyone in this thread has problem with brightness
and noone reported problem with these keys. Actually, I have doblue-
brightness issue on my Dell Inspiron 1520 (with 12.04 beta 2!! will it
ever be fixed?!) and
Confirmed here, since a lot a Ubuntu release, now:
Ubuntu 11.10 64-bit, kernel Linux 3.2.13 on Dell XPS M1330 Intel graphic
x3100. This behaviour occur both with main graphics driver than with the
onces included in this PPA https://launchpad.net/~oibaf/+archive
/graphics-drivers
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The bug report is titled too narrowly, as the problem obviously
encompasses multiple hardware platforms. This should be a clue for the
developers.
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On Fri, Mar 23, 2012 at 10:54:31AM -, Daniel Ansari wrote:
The bug report is titled too narrowly
No, because if you're seeing such a symptom on different hardware, it is an
*unrelated bug* and you should file a new bug report.
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I have seen Lenovo bug notify here too... I don't think it is related
with vendor Dell...
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Title:
Screen brightness double level changes on Dell
The same problem. 4 events. The brightnes in/decrased by 2 steps:
Ubuntu 11.10 Unity
Ubuntu 11.10 Gnome-shell
$ cat /sys/class/dmi/id/sys_vendor
Hewlett-Packard
$ cat /sys/class/dmi/id/product_name
HP Pavilion dm4 Notebook PC
$ sudo killall gnome-settings-daemon
$ /etc/init.d/acpid stop
$
One more thing respectively to my previous comment:
$ acpi_listen
# single brightness down button pressed (Fn+F2)
video DD02 0087
video DD02 0087
# single brightness up button pressed (Fn+F3)
video DD02 0086
video DD02 0086
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$ cat /sys/class/dmi/id/product_name
HP Pavilion dm4 Notebook PC
This bug report is about Dell laptops. Please open a separate bug
report for your issue.
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I was using Ubuntu 11.10 (32 bit) on a ThinkPad W510, and having this
problem. Fn+Down decreased brightness by 2 steps, and Fn+Up increased
it by 3 steps.
I just changed my installation to Xubuntu 11.10 64 bit, and am having
the same issue, thus it's not specific to Gnome nor KDE. I don't have
I have this bug ever since I first started using Ubuntu - please don't
take it away...
OK, in all seriousness, this is not a workaround, but I find it useful
https://launchpad.net/~indicator-brightness/+archive/ppa
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I'm using ubuntu, lubuntu, and kubuntu 11.10 and thinkpad T520. Pressing
brightness-up/down changes brightness by 3 steps.
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Title:
Screen
No. This bug can be found in kde and gnome. It looks like hal-related bug. You
can switch to console (Alt-Ctrl-F1) and change brightness by one step.
This behavoir is known since April 2008...
And I can confirm that pressing brightness-up/down changes brightness by
3 steps.
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I'm also still experiencing this bug in 11.10, although now the brightness
level changes by 3 steps instead of 2 when pressing the brighntess-up/down key
once.
It's interesting that this happens just after login in. On the login screen
(LightDM) it's working fine, so maybe it's still a
Yeah! Cool!
It is a three-year-old bug and I can still reproduce it in Ubuntu 11.10!
Let's leave this bug for the third LTS! I will miss this one if someday
it will be fixed!
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I'm also having this problem on a Dell Latitude E6410 with Ubuntu 11.04,
using the Classic (no effects) desktop.
A new (I think) detail, though:
If I have a menu open in the panel, any menu (applications, places, system,
volume, time/date, etc), and try changing the brightness with it open, it
Similar problem on my ThinkPad T400, but with steps of two or three.
cat /sys/devices/virtual/backlight/acpi_video0/actual_brightness goes 0 - 2 -
5 - 8 - 11 - 14 - 15 (max), down: - 13 - 11 - 8 - 6 - 3 - 0. Manual
setting of each single step via panel is possible.
I haven't had this on
Is three years is not enough to fix this bug?
There were seven releases!
hardy [LTS]. intrepid. jaunty. karmic. lucid [LTS]. maverick. natty.
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I can confirm this bug on Dell Inspiron 1520 and fresh Ubuntu Natty
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Title:
Screen brightness double level changes on Dell laptops
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I have similar problem on my HP 6715s. I think bios controls the brightness,
and when I change the brightness, it goes 2 steps.
Ubuntu 11.04 x64
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I still have this problem in Natty. If I kill gnome-power-manager and
acpid, I can still change the brightness (I get all 8 steps that way).
But I get no output at all with either lshal -m or sudo /lib/udev/keymap
-i input/event4 and sudo /lib/udev/keymap -i input/event5 in this mode.
Is the
** Changed in: linux
Importance: Unknown = Medium
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Title:
Screen brightness double level changes on Dell laptops
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Does this issue still exist in Hardy Heron?
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Okay, so... where is the fix?
I'm a complete Linux newbie, but I'm raging right now because everything is so
fricking hard to find out about. Yes, I am smashing my head and my fists
against a brick wall right now. :)
I should have just downgraded to 7.10 right now, but then I wouldn't be
able
verified the commit in Lucid. Marked Fix Released. Declined nomination
for Intrepid.
-JFo
** Changed in: linux (Ubuntu)
Status: Triaged = Fix Released
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** Tags added: iso-testing
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Thanks. Please run each of the following commands, and confirm that you
see output with each when pressing the brightness-up key:
sudo /lib/udev/keymap -i input/event4
sudo /lib/udev/keymap -i input/event5
--
Screen brightness double level changes on Dell laptops
I get this:
rev...@sovereign:~$ sudo /lib/udev/keymap -i input/event4
Press ESC to finish
scan code: 0x86 key code: brightnessup
scan code: 0x85 key code:
Single brightness-up press gives single event:
$ sudo /lib/udev/keymap -i input/event4
Press ESC to finish
scan code: 0x86 key code: brightnessup
scan code: 0x01 key code: esc
$ sudo /lib/udev/keymap -i input/event5
Press ESC to finish
scan code: 0x00 key code: brightnessup
/lib/udev/keymap
i am running a fresh install of 9.10 on a Dell XPS M1330 laptop
getting two events per each keypress:
11:07:03.785: platform_i8042_i8042_KBD_port_logicaldev_input condition
ButtonPressed = brightness-up
11:07:03.799: computer_logicaldev_input condition ButtonPressed = brightness-up
xev output looks normal (one down, one up event for each keypress). The
output of acpi_listen doesn't show any events that acpid/acpi-support
react to by default.
Please try stopping acpid (sudo service stop acpid) and test again, and
see whether this makes any difference (I don't expect that it
You were right, after sudo service acpid stop nothing changed.
** Attachment added: lshal.txt
http://launchpadlibrarian.net/35006997/lshal.txt
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Afunix: I found a work-around to this problem.
Open up Global Keyboard Shortcuts in system settings and select KDE Daemon
in the
KDE Component drop-down.
There you should see the Decrease/Increase screen brightness, I just set both to
custom: none and after that I only got one brightness-change
Yes. It works.
So, does acpid set brightness?
How should both systems (acpi and kde) work together?
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Why do you think this is the same bug when this bug report has been
marked as fixed since Ubuntu 8.10?
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Look at lshal's output in beginning of the thread, and in my previos message.
They are the same!
- 2008-03-27: -
$ lshal -m
Start monitoring devicelist:
-
12:55:17.525: platform_i8042_i8042_KBD_port_logicaldev_input condition
Reopening the linux task, then. afunix, please look at
https://wiki.ubuntu.com/Hotkeys/Troubleshooting to help is figure out
why you're getting two events instead of one.
** Changed in: linux (Ubuntu)
Status: Fix Released = Confirmed
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$ xev | sed -n 's/^.*state \([0-9].*\), keycode *\([0-9]\+\) *\(.*\),
.*$/keycode \2 = \3, state = \1/p'
keycode 36 = (keysym 0xff0d, Return), state = 0x0
keycode 233 = (keysym 0x1008ff02, XF86MonBrightnessUp), state = 0x0
keycode 233 = (keysym 0x1008ff02, XF86MonBrightnessUp), state = 0x0
** Attachment added: lsinput.log
http://launchpadlibrarian.net/34715531/lsinput.log
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xkbmap.txt
xkb_keymap {
xkb_keycodes { include evdev+aliases(qwerty) };
xkb_types { include complete };
xkb_compat{ include complete+ledscroll(group_lock)};
xkb_symbols { include
** Attachment added: udev-db.txt
http://launchpadlibrarian.net/34715620/udev-db.txt
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I'm using kubuntu, so I can't apply gnome-*/gconf* instructions
ACPI says:
$ acpi_listen
video LCD 0086
video LCD 0087
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And I can change brightness normally in console and echoing to
/sys/class/backlight/.../brightness
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OMG, fresh karmic kubuntu clean install on Dell Inspiron 1520, and bug is still
here:
$ lshal -m
Start monitoring devicelist:
-
08:27:42.662: platform_i8042_i8042_KBD_port_logicaldev_input condition
ButtonPressed = brightness-up
08:27:42.676:
** Branch linked: lp:ubuntu/hardy-proposed/kde-guidance
** Branch linked: lp:ubuntu/intrepid/kde-guidance
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Amir,
The new notification system has no bearing on how hotkeys are handled.
If you're seeing a hotkey having the wrong effect, please follow the
troubleshooting guide at https://wiki.ubuntu.com/Hotkeys/Troubleshooting
to determine where in the system the second hotkey is going wrong, and
file a
Thanks Steve,
After I looked more deeply into the problem, I found that the problem is not
with brightness level changes -- it changes correctly when I press
Fn+Up/Down keys.
The problem is that there are 6 brightness levels (as reported in
'/proc/acpi/video/VID/LCD/brightness'), which are 12,
I made a mistake. There 8 levels of brightness reported, and the brightness
pop-up also shows 8 levels correctly.
The problem is that one level is sometimes jumped over randomly. I'll read
the link you sent more carefully again and try find the source of the
problem.
Thanks.
On Sat, May 9, 2009
Can somone confirm that the bug is fixed on Dell m1330 with intel
graphics?
I have such a model and I keep seeing double changes in brightness when
I press FN+Up or Down and g-p-m is running. Also using latest intel
drivers did not help. Using the .30 mainline kernel does give one-step
I can confirm that this is fixed in my Dell Inspiron 6400.
But a new problem is introduced: when pressing Ctrl+Fn Down immediately
after Ctrl+Fn Up (or vise versa), the brightness continues to go up, as if
it has an inertia. Of course, this may be a bug with Jaunty's new
notification system.
On
On Fri, May 8, 2009 at 7:58 AM, Guido Conaldi guido.cona...@poste.it wrote:
Can somone confirm that the bug is fixed on Dell m1330 with intel
graphics?
For clarity, my aforementioned resolution was on an XPS 1300 with
nvidia, not intel.
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** Summary changed:
- Screen brightness double level changes
+ Screen brightness double level changes on Dell laptops
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Sounds like this can be considered fixed on the Dell laptops now, for
jaunty and beyond.
Users of non-Dell laptops who are experiencing similar symptoms should
file separate bug reports (preferably, after checking whether the
problem still affects them with Ubuntu 9.04).
** Changed in: linux
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