Verified with 14.04 + update (3.13.0-40) on 201305-13636,
this issue has been fixed in Trusty
** Changed in: hwe-next
Status: Invalid = Fix Released
** Changed in: hwe-next/trusty
Status: Fix Committed = Fix Released
** Changed in: linux (Ubuntu)
Status: Confirmed = Fix
EoL as per
https://wiki.ubuntu.com/Kernel/LTSEnablementStack#Kernel.2BAC8-Support.A12.04.x_Ubuntu_Kernel_Support
.
** Changed in: linux-lts-raring (Ubuntu)
Status: New = Invalid
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This bug was fixed in the package linux - 3.13.0-35.62
---
linux (3.13.0-35.62) trusty; urgency=low
[ Joseph Salisbury ]
* Release Tracking Bug
- LP: #1357148
[ Brad Figg ]
* Start new release
[ dann frazier ]
* SAUCE: (no-up) Fix build failure on arm64
- LP:
** Branch linked: lp:ubuntu/precise-security/linux-lts-trusty
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https://bugs.launchpad.net/bugs/1250401
Title:
[Dell Inspiron 5737] brightness could not be controlled by the
indicator
** Tags removed: verification-needed-trusty
** Tags added: verification-done-trusty
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Title:
[Dell Inspiron 5737] brightness could not be
** Branch linked: lp:ubuntu/precise-proposed/linux-lts-trusty
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Title:
[Dell Inspiron 5737] brightness could not be controlled by the
indicator
This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
trusty' to 'verification-done-trusty'.
If verification is not done by 5 working days from
** Branch linked: lp:ubuntu/trusty-proposed/linux-keystone
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Title:
[Dell Inspiron 5737] brightness could not be controlled by the
indicator
3.16-r5 will include the patch (comment #11)
http://marc.info/?l=linux-acpim=140502326708708w=2
** Changed in: hwe-next/trusty
Status: New = Fix Committed
** Changed in: linux (Ubuntu Trusty)
Status: Triaged = Fix Committed
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Backlight works with the kernel mentioned in
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1333638/comments/10.
I will submit a sauce patch for Dell Inspiron 5547/5447/5737 and Vostro
5470.
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Upstream accepts the patch mentioned in #11.
https://kernel.googlesource.com/pub/scm/linux/kernel/git/rafael/linux-pm/+/08a56226d84706d402372d891550e130ef5df9f0
And the bug for Vostro 5470 is set to invalid.
I will submit the sauce patch for Dell Inspiron 5547/5447 only.
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** Also affects: hwe-next/trusty
Importance: Undecided
Status: New
** Also affects: hwe-next/utopic
Importance: Undecided
Status: New
** Changed in: hwe-next/utopic
Status: New = Invalid
** Changed in: hwe-next/trusty
Assignee: (unassigned) = Edward Lin (airken)
** Also affects: hwe-next
Importance: Undecided
Status: New
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Title:
[Dell Inspiron 5737] brightness could not be controlled by the
** Changed in: linux (Ubuntu Trusty)
Status: In Progress = Triaged
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Title:
[Dell Inspiron 5737] brightness could not be controlled by the
Add Dell Inspiron 5737 to the the ACPI video detect blacklist.
http://marc.info/?l=linux-acpim=140325203002742w=2
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Title:
[Dell Inspiron 5737]
** Changed in: linux (Ubuntu Trusty)
Status: Fix Committed = In Progress
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Title:
[Dell Inspiron 5737] brightness could not be controlled
The patch mentioned in #9 is committed in upstream v3.16-rc1.
Need to cheery-pick it to trusty kernel.
** Changed in: linux (Ubuntu Trusty)
Status: Triaged = Fix Committed
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Tried following kernel parameters,
1. acpi_osi=!Windows 2012
2. acpi_backlight=vendor
3. video.use_native_backlight=1
each of them can fix this bug.
Since upstream is going to change the default for video.use_native_backlight to
1,
this bug can be fixed in later release after the patch is
** Changed in: linux (Ubuntu Trusty)
Assignee: (unassigned) = Edward Lin (airken)
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Title:
[Dell Inspiron 5737] brightness could not be
** Also affects: linux-lts-raring (Ubuntu Trusty)
Importance: Undecided
Status: New
** Changed in: linux-lts-raring (Ubuntu Trusty)
Status: New = Invalid
** Also affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags added: blocks-hwcert-enablement
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The bug is still there on 14.04
** Tags added: trusty
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Title:
[Dell Inspiron 5737] brightness could not be controlled by the
indicator applet
** Changed in: linux-lts-raring (Ubuntu)
Importance: Undecided = Medium
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Title:
[Dell Inspiron 5737] brightness could not be controlled by
command
$ sudo -u root -i
$ cat /sys/class/backlight/acpi_video0/actual_brightness; echo 3
/sys/class/backlight/acpi_video0/brightness; cat
/sys/class/backlight/acpi_video0/actual_brightness
will dump
99
99
---
that is, before and after the echo, actual_brightness is the same
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This command works to change the brightness to be max
cat /sys/class/backlight/intel_backlight/max_brightness | sudo tee -a
/sys/class/backlight/intel_backlight/brightnes
or adjust the brightness by a integer, for example, 400
echo a-integer-for-example-400 | sudo tee -a
the value returned from
cat /sys/class/backlight/acpi_video0/actual_brightness
does not change together with the brightness slider
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Title:
the value returned from
cat /sys/class/backlight/intel_backlight/actual_brightness
does not change together with the brightness slider
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The problem here is that the gsd-backlight-helper code used by the
brightness applet prefers to always use 'acpi_video0' or whatever
backlight device has type 'firmware'. This means that it will update
/sys/class/backlight/acpi_video0/brightness, which does not work. Our
test code will update the
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