** Changed in: unity-settings-daemon (Ubuntu)
Status: Won't Fix => In Progress
** Also affects: linux (Ubuntu Trusty)
Importance: Undecided
Status: New
** Also affects: unity-settings-daemon (Ubuntu Trusty)
Importance: Undecided
Status: New
** No longer affects: linux
** Branch linked: lp:~ci-train-bot/unity-settings-daemon/unity-settings-
daemon-ubuntu-xenial-landing-010
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https://bugs.launchpad.net/bugs/1381625
Title:
Adjust brightness
** Attachment added: "bug.rar"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1381625/+attachment/4520010/+files/bug.rar
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Ti
Yes, we can use that approach on unity-settings-daemon, with some minor
modification to make xbacklight works.
My intention to make it configurable is because there was a Braswell
laptop with a cheap panel, which needs at least 5% max brightness to
make it barely visible. For OEM projects, to solv
So if you run into that situation, discovering that this is configurable
and changing the configuration seems equally hard (or harder). I can
understand the heuristics what was done upstream in gnome-settings-
daemon (see linked bug) to generally clam the brightness to >= 1 if
there are many steps.
There are some scenarios make turning off brightness not desirable, e.g.
an AIO user changes brightness to the lowest level in unity-control-
center, he can't change it back if his keyboard does not have brightness
hotkey.
Since we can't ensure that all graphics driver have the same mechanism
and
Reverting that commit can easily fix this issue or we need to fix all
userspace programs related to the brightness control.
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Title:
This bug probably targets on how to avoid this driver behavior's change.
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Title:
Adjust brightness to lowest value caused screen who
Since Linux kernel v3.18-rc1, it contains
commit e6755fb78e8f20ecadf2a4080084121336624ad9
Author: Jani Nikula
Date: Tue Aug 12 17:11:42 2014 +0300
drm/i915: switch off backlight for backlight class 0 brightness
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see my comments on https://code.launchpad.net/~kaihengfeng/unity-
settings-daemon/add-brightness-limit-mechanism/+merge/277416 , high-
level userspace isn't the place for changing this.
Can you please elaborate on what the actual bug is here? I. e. what's
wrong with turning off the backlight on th
I. e. is the problem that the backlight doesn't come back on when you
raise the brightness again or so?
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Title:
Adjust brightness to
** Changed in: unity-settings-daemon
Status: Unknown => Fix Released
** Changed in: unity-settings-daemon
Importance: Unknown => Medium
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** Branch linked: lp:~fourdollars/unity-settings-daemon/fix-lowest-
brightness
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Title:
Adjust brightness to lowest value caused scre
** Bug watch added: GNOME Bug Tracker #744278
https://bugzilla.gnome.org/show_bug.cgi?id=744278
** Also affects: unity-settings-daemon via
https://bugzilla.gnome.org/show_bug.cgi?id=744278
Importance: Unknown
Status: Unknown
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** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Tejal (tejalravih)
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Title:
Adjust brightness to lowest value caused scr
** Changed in: unity-settings-daemon (Ubuntu)
Importance: Undecided => High
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Title:
Adjust brightness to lowest value caused scre
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: unity-settings-daemon (Ubuntu)
Status: New => Confirmed
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** Changed in: hwe-next
Importance: Undecided => High
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Title:
Adjust brightness to lowest value caused screen whole black
Status
Hey, a small update. Lantern test v2 tests exactly what happens when
brightness is set to 0. I have 10 samples so far and I will be able to
analyze them today. My gut feeling is that acpi aka firmware control
never tuns the backlight off entirely (so setting zero in userspace is
safe) while raw con
Hey.
I'm researching the behaviour of backlight in the wild and my current
theory is that brightness of zero can equally well mean "dim" or
"totally off". I don't have a test for that yet so the sample range is
very small (the hardware I have at home + several contributions from the
community) but
Ok, so this got fixed for i915_bdw in
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1374389
but even the fixed kernel doesn't work on my Wilson Beach SDP, and the
commits in i915_bdw got reverted for 3.17 and up. Even drm-intel-next
(->4.1) doesn't work.
So I guess it's best to fix in user
** Changed in: hwe-next
Assignee: (unassigned) => Timo Aaltonen (tjaalton)
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Title:
Adjust brightness to lowest value caused scr
** Changed in: hwe-next
Status: Invalid => Confirmed
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Title:
Adjust brightness to lowest value caused screen whole black
Sta
my understanding of the oem bug is we think the driver is behaving
normal and this should be fixed in user space, Tim Chen already has a
patch for g-s-d which we can re-work it for u-s-d.
** Also affects: ubuntu-system-settings (Ubuntu)
Importance: Undecided
Status: New
** No longer aff
** No longer affects: oem-priority
** Also affects: hwe-next
Importance: Undecided
Status: New
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Title:
Adjust brightness
update kernel from 3.16.0-25 to 3.19.0-031900rc4-lowlatency, the
brightness issue is not fixed.
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
** Tags added: kernel-bug-exists-upstream
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Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v3.19 kernel[0].
If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.
If the mainline kernel does not fix t
** Description changed:
- When using F2 hotkey to adjust screen brightness to lowest value, it
- truns screen backlight off.
+ [Impact]
- Steps: 1. Press F2 to adjust screen brightness to lowest value
+ When adjusting screen brightness to lowest value, it turns screen
+ backlight off.
+
+ [Tes
Issue can be reproduced with below builds, please refer the results
below:
[Tested images for verification]
Stock 14.04.1 [ubuntu-14.04.1-desktop-amd64.iso] -> Failed
Stock 14.10 [ubuntu-14.10-desktop-amd64.iso] -> Failed
15.04 daily build @1/13 [vivid-desktop-amd64.iso] -> Failed
[Test Case / Re
Issue can be reproduced with below builds, please refer the results
below:
[Tested images for verification]
Stock 14.04.1 [ubuntu-14.04.1-desktop-amd64.iso] -> Failed
Stock 14.10 [ubuntu-14.10-desktop-amd64.iso] -> Failed
15.04 daily build @1/13 [vivid-desktop-amd64.iso] -> Failed
[Test Case / Re
** Changed in: linux (Ubuntu)
Importance: Undecided => High
** Tags added: vivid
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Title:
Adjust brightness to lowest value cause
@Timo,
Original oem lp:1281379 was reported with Intel Haswell or Chief River
platforms.
We will verify with vivid in kittyhawk 2.0 and update result here.
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Timo,
Thanks for you quick look.
Here is the original bugs. :)
https://bugs.launchpad.net/stella/+bug/1281379
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Title:
Adjust br
hm, didn't notice this was a public bug.. so moving to linux
** Package changed: unity-settings-daemon (Ubuntu) => linux (Ubuntu)
** No longer affects: unity-settings-daemon
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