** Changed in: hwe-next
Status: Triaged => Fix Released
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Title:
[Dell Inspiron 5721] Brightness control does not work with
12.04.5(with
** Branch linked: lp:ubuntu/precise-security/linux-lts-trusty
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Title:
[Dell Inspiron 5721] Brightness control does not work with
12.04.5(with k
This bug was fixed in the package linux-lts-trusty -
3.13.0-37.64~precise1
---
linux-lts-trusty (3.13.0-37.64~precise1) precise; urgency=low
[ Joseph Salisbury ]
* Release Tracking Bug
- LP: #1372747
[ dann frazier ]
* [Config] CONFIG_HW_RANDOM_XGENE=m on arm64
[ Edw
This bug was fixed in the package linux - 3.13.0-37.64
---
linux (3.13.0-37.64) trusty; urgency=low
[ Joseph Salisbury ]
* Release Tracking Bug
- LP: #1372576
[ dann frazier ]
* [Config] CONFIG_HW_RANDOM_XGENE=m on arm64
[ Edward Lin ]
* SAUCE: Add use_native_back
** Branch linked: lp:ubuntu/trusty-proposed/linux-keystone
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Title:
[Dell Inspiron 5721] Brightness control does not work with
12.04.5(with kern
Verification done.
Attaching logs for references.
** Tags removed: verification-needed-trusty
** Tags added: verification-done-trusty
** Attachment added: "201210-11863 with 3.13.0-37 logs.apport"
https://bugs.launchpad.net/ubuntu/+source/linux-lts-trusty/+bug/1354313/+attachment/4221316/+fil
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 t
** Branch linked: lp:ubuntu/precise-proposed/linux-lts-trusty
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Title:
[Dell Inspiron 5721] Brightness control does not work with
12.04.5(with k
** Also affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Trusty)
Importance: Undecided
Status: New
** Also affects: linux-lts-trusty (Ubuntu Trusty)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Precise)
** Changed in: linux-lts-trusty (Ubuntu)
Status: In Progress => Fix Committed
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Title:
[Dell Inspiron 5721] Brightness control does not wor
"acpi_video=vendor" is wrong.
Sorry for the mistake.
The right one should be "acpi_backlight=vendor".
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Title:
[Dell Inspiron 5721] Brightness c
@kaxing,
Win8 doesn't use ACPI to control backlight but leaves control to gfx driver
instead.
If system tells BIOS that it has win8 capability, BIOS will disable ACPI
backlight interface.
Linux kernel starts to support Win8 capability after 3.7.
That's why ACPI backlight control works on early k
** Description changed:
This is a system installed with latest stable 12.04.5 image.
The Brightness key will invoke the osd-notify indicator but the display
brightness won't change.
Verifying the value changing in backlight interface, system are using
acpi_video0 instead:
Step
@airken ,
"video.use_native_backlight=1" works, brightness can be controlled with
this workaround, and the acpi_video0 is disappear under
/sys/class/backlight
but "acpi_video=vendor" won't work, it's still using
/sys/class/acpi_video0, same as original situation.
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@kaxing
Can you add kernel parameter to grub without the workaround you found
and test the backlight function again?
Either "acpi_video=vendor" or "video.use_native_backlight=1"
** Changed in: linux-lts-trusty (Ubuntu)
Status: New => In Progress
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** No longer affects: xorg (Ubuntu)
** Changed in: hwe-next
Assignee: (unassigned) => Edward Lin (airken)
** Changed in: linux-lts-trusty (Ubuntu)
Assignee: (unassigned) => Edward Lin (airken)
** Changed in: hwe-next
Status: New => Triaged
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** Also affects: hwe-next
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1354313
Title:
[Dell Inspiron 5721] Brightness control does not work with
12.04.
** Tags added: 201210-11865
** Attachment added: "201210-11865.apport"
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1354313/+attachment/4172642/+files/201210-11865.apport
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