Public bug reported:
the change in the level of illumination of the screen, through the
corresponding option in the control panel, has no effect.
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-23-generic 3.13.0-23.45
ProcVersionSignature: Ubuntu 3.13.0-23.45-generic 3.13
** Tags added: kernel-bug-exists-upstream
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
** Tags added: kernel-bug-exists-upstream-v3.14-trusty
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https:
WORKAROUND: add video.use_native_backlight=1 to kernel cmdline
** Description changed:
+ WORKAROUND: video.use_native_backlight=1
+
the change in the level of illumination of the screen, through the
corresponding option in the control panel, has no effect.
ProblemType: Bug
DistroRelea
The bug persist on Kernel v3.13-rc8
** Tags removed: kernel-bug-exists-upstream-v3.13-rc7
** Tags added: kernel-bug-exists-upstream-v3.13-rc8
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The bug persist on Kernel v3.13-trusty
** Tags removed: kernel-bug-exists-upstream-v3.13-rc8
** Tags added: kernel-bug-exists-upstream-v3.13-trusty
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Hi all,
Now that we have identified workarounds ... the bug will be fixed?
Anyway thanks to everyone for the help.
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https://bugs.launchpad.net/bugs/1261853
Title:
8086:0166
The bug persist on Kernel v3.13-rc6
** Tags removed: kernel-bug-exists-upstream-v3.13-rc5
** Tags added: kernel-bug-exists-upstream-v3.13-rc6
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The bug persist on Kernel v3.13-rc7
** Tags removed: kernel-bug-exists-upstream-v3.13-rc6
** Tags added: kernel-bug-exists-upstream-v3.13-rc7
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*** This bug is a duplicate of bug 1225811 ***
https://bugs.launchpad.net/bugs/1225811
Public bug reported:
the change in the level of illumination of the screen, through the
corresponding option in the control panel, has no effect
ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: linux-
This bug also affected my PC. You can find my report and attachment
here: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1261853
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https://bugs.launchpad.net/bugs/122581
I tested from live-usb the daily .iso of Ubuntu. The problem persist. I attach
the report generated by the command apport-cli - save bug.log linux.
Now I go to try the live-usb .iso version 12.04.03
** Attachment added: "bug.log"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1261853/+a
alex@alex-Inspiron-5521:~$ sudo dmidecode -s bios-version && sudo dmidecode -s
bios-release-date
[sudo] password for alex:
A12
10/25/2013
I updated the BIOS to version suggested but did not produce any change.
It remains impossible to adjust the screen brightness
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** Tags removed: staging
** Tags added: kernel-bug-exists-upstream-3.12.0-7-generic
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
** Tags added: kernel-bug-exists-upstream staging
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Sorry but i'm not an expert user.
which of these .deb should I download and install?
** Attachment added: "Schermata del 2013-12-18 11:59:46.png"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1261853/+attachment/3931812/+files/Schermata%20del%202013-12-18%2011%3A59%3A46.png
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You rec
** Tags removed: needs-upstream-testing
** Tags added: kernel-bug-exists-upstream
** Tags removed: kernel-bug-exists-upstream
** Tags added:
kernel-bug-exists-upstreamkernel-bug-exists-upstream-v3.13-rc3-trusty
** Tags removed:
kernel-bug-exists-upstreamkernel-bug-exists-upstream-v3.13-rc3-trus
ok, bug confirmed on last upstream kernel.
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https://bugs.launchpad.net/bugs/1261853
Title:
8086:0166 [Dell Inspiron 15R 5521] Impossible to adjust the screen
backlight
S
with the following workaround the problem is solved
acpi_backlight=vendor
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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I sent the email to linux-a...@vger.kernel.org as suggested.
I also point out that the workaround works only with the Ubuntu stable kernel
version (3.11.0-14-generic). In the v.3.13-rc3 produces black screen.
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Hi Christopher,
a maintainer of the Linux kernel has written this
Does this patch help?
http://www.spinics.net/lists/linux-acpi/msg47755.html
what should i do
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update:
I tried the v3.13-rc5 kernel from the mainline.
Without the workaround acpi_backlight=vendor the adjusting of backlight does
not work.
In the other hand, the application of workaround at the v3.13-rc5 kernel
produces blackscreen at startup of the OS.
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the only version where the workaround works remains the
3.11.0-14-generic (Ubuntu stable kernel)
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Title:
8086:0166 [Dell Inspiron 15
Hi guys,
adding video.use_native_backlight=1 to kernel cmdline produce the solving of
the problem on Ubuntu kernel v3.13-rc5.
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Title:
but does not work in Ubuntu Kernel v3.11.0-14-generic
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Title:
8086:0166 [Dell Inspiron 15R 5521] Impossible to adjust the screen
b
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