Thanks for the feedback Juan. I'll go ahead and mark this Fix
Released per you last comment.
** Changed in: linux (Ubuntu)
Status: Incomplete = Fix Released
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acpi video module prevents brightness adjusting
https://bugs.launchpad.net/bugs/74284
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I'm sorry, I meant Intrepid instead of Hardy in my last comment (comment
#24).
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It looks like it has been solved in Hardy: when acpi video module is
loaded, I can change brightness using hotkeys even if g-p-m is not
loaded.
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Hi Juan,
It unfortunately looks like this didn't get resolved for the Hardy
release. Care to just confirm this is still an issue with the upcoming
Intrepid Ibex 8.10 release? More information regarding the latest Alpha
release for Intrepid can be found here - http://www.ubuntu.com/testing .
You
** Attachment added: uname-a.log
http://launchpadlibrarian.net/14860969/uname-a.log
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** Attachment added: version.log
http://launchpadlibrarian.net/14860979/version.log
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** Attachment added: dmesg.log
http://launchpadlibrarian.net/14861080/dmesg.log
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** Attachment added: lspci-vvnn.log
http://launchpadlibrarian.net/14861086/lspci-vvnn.log
** Changed in: linux (Ubuntu)
Status: Incomplete = New
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acpi video module prevents brightness adjusting
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Hi Juan,
Per the kernel team's bug policy, can you please attach the following
information. Please be sure to attach each file as a separate
attachment.
* uname -a uname-a.log
* cat /proc/version_signature version.log
* dmesg dmesg.log
* sudo lspci -vvnn lspci-vvnn.log
For more information
Over 4 months with no response. We are closing this bug report because
it lacks the information we need to investigate the problem, as
described in the previous comments. Please reopen it if you can give us
the missing information, and don't hesitate to submit bug reports in the
future. To reopen
Oops, sorry for my late reply.
I'm running an up-to-date Hardy clean install, and I'm still
experiencing this bug. That is, after the video module is loaded, I
can't change brightness with Fn keys without gnome-power-manager (but my
Dell laptop do this by hardware!). Also, with the video module
Hardy Heron Alpha2 was recently released. It contains an updated
version of the kernel. You can download and try the new Hardy Heron
Alpha2 release from http://cdimage.ubuntu.com/releases/hardy/alpha-2/ .
You should be able to then test the new kernel via the LiveCD. If you
can, please verify
It is work for me now.
Did you do any update to fix this?
That is because I move to GNOME and it is working only in GNOME and not
KDE.
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Nadav, it's working for you because gnome-power-manager is changing your
brightness. If you sudo killall gnome-power-manager, then you'll not
be able to change brightness using hotkeys. However, if you blacklist
the acpi module, you'll be able to change brightness using hotkeys even
after you kill
Hi Juan,
Thanks for your update. I'm retargeting this bug towards the upcoming
Hardy kernel. I've tagged this as hardy-kernel-candidate so that we
make sure to retarget this report once the new release is out. However
against the linux-source-2.6.22 package this is being marked as Won't
Fix as
It is work for me now.
Did you do any update to fix this?
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It's still reproducible. That is, I can't adjust brightness using hotkeys after
acpi video module is loaded (assuming gnome-power-manager is not currently
loaded).
Blacklisting the video module is still a valid workaround.
It has also been reported as bug #140782, but it has been incorrectly
Hi Juan, now that the 7.10 Gutsy Gibbon release of Ubuntu is out, we
were wondering if you can still reproduce this issue as well. Could you
please download and try the new version of Ubuntu from
http://www.ubuntu.com/getubuntu/download and report back your results.
If the issue is still present
I have DELL INSPERON 6400, I upgrade to Guesty today and now I can't change the
screen brightness.
It is work perfectly in Feisty.
** Changed in: linux-source-2.6.22 (Ubuntu)
Sourcepackagename: linux-source-2.6.17 = linux-source-2.6.22
Status: Invalid = New
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acpi video module prevents
[Expired for linux-source-2.6.17 (Ubuntu) because there has been no
activity for 60 days.]
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** This bug is no longer a duplicate of bug 64308
ACPI works only if the video module is disabled
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*** This bug is a duplicate of bug 64308 ***
Bug confirmed also on my machine: Dell Inspiron 6400.
I've also compiled kernel 2.6.19 and the bug is still present in the video
module.
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*** This bug is a duplicate of bug 64308 ***
The problem remains after updating my BIOS to the latest version (A05).
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My BIOS is up to date. The problem is that the function
acpi_video_get_next_level in video.c is not implemented in version
2.6.17 (reference: http://lkml.org/lkml/2006/11/24/131). I think the
function has been implemented in version 2.6.19 (reference:
*** This bug is a duplicate of bug 64308 ***
** This bug has been marked a duplicate of bug 64308
ACPI works only if the video module is disabled
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** Changed in: linux-source-2.6.17 (Ubuntu)
Status: Unconfirmed = Confirmed
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Check to make sure your BIOS is up-to-date. It can be that this is
because the ACPI on your machine is broken, but I wont rule out a bug in
the acpi video driver.
** Changed in: linux-source-2.6.17 (Ubuntu)
Status: Confirmed = Needs Info
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acpi video module prevents brightness adjusting
Correction: my experience is a little different. I have logged it as Bug
#71433.
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I can confirm this problem on my Dell Inspiron 9400. A solution is to
add the line alias video off to /etc/modprobe.d/local
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