@jbowen7
Thanks for testing and the feedback.
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Title:
Samsung Series 900 Laptop brightness control issue (heavy flickering)
To manage
You're welcome, thanks for the patch.
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Title:
Samsung Series 900 Laptop brightness control issue (heavy flickering)
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It would also be helpful if folks affected by this bug can run the tests
requested in comment #88. That will allow us to get a proper fix in
upstream linux-stable, instead of reverting a prior commit.
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Test Results (Test proposed in comment #88 )
1) First Kernel -- confirmed: bug EXISTS
(linux-image-3.2.30-030230-generic_3.2.30-030230.201209191335_amd64.deb )
2) Second Kernel with upstream patches applied -- confirmed: bug RESOLVED
Samsung 9 900X3A Ubuntu Air
3.2.0-31-generic #50-Ubuntu SMP Fri Sep 7 16:16:45 UTC 2012 x86_64
Fn+F1 :performance mode (?) (nope)
Fn+F2: dim screen brightness OK (no flicker)
Fn+F3: screen brightness up OK
Fn+F4: switch video mode (?)
Fn+F5: switch touchpad on/off OK
Fn+F6: battery life extender
It would also be helpful if folks affected by this bug can run the tests
requested in comment #88. That will allow us to get a proper fix in
upstream linux-stable, instead of reverting a prior commit.
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I confirm, 3.2..0-31 resolved the problem. Thank you..
I've seen some emails regarding a confusion on how to receive the fix, for
those:
copy this code into terminal:
sudo apt-get update sudo apt-get install linux-image-3.2.0-31-generic
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Did not fix my Samsung issue
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Title:
Samsung Series 900 Laptop brightness control issue (heavy flickering)
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This bug was fixed in the package linux - 3.2.0-31.50
---
linux (3.2.0-31.50) precise-proposed; urgency=low
[Luis Henriques]
* Release Tracking Bug
- LP: #1047242
[ Dave Airlie ]
* SAUCE: drm/vmwgfx: add MODULE_DEVICE_TABLE so vmwgfx loads at boot
- LP: #1039157
The upstream fix went to v. 3.2.28.
* Revert samsung-laptop: make the dmi check less strict
** Changed in: linux
Status: New = Fix Released
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Look, im not an advanced user. I am a fish out of water doing my best to
learn. Where do I go? How do i get this fix??
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Title:
Samsung Series
Hi All,
There is a new patch upstream that is being considered in upstream
stable v3.2.y. I built a test kernel with these new patches. Would it
be possible for folks that were affected by this bug to test two
kernels?
The first kernel is v3.2.30, which should exhibit this bug:
v3.2.30:
@Alexander, there is a fix in the latest release of Precise(Ubuntu
12.04). Have you applied all of the latest updates?
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Title:
Samsung Series
@Alexander: Ubuntu should automatically prompt you to install the update
once it's pushed out, just like normal. If this doesn't happen for some
reason run Update Manager from the menu.
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Ok, thanks. But what kernel should i be running? I had to use a test
kernel b/c that was the only way to get my laptop to work. So i
installed 3.2.28... is that correct? I also have 3.2.30 on my grub
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also verified 3.2.0-31.50 from proposed
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Title:
Samsung Series 900 Laptop brightness control issue (heavy flickering)
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** Branch linked: lp:ubuntu/precise-proposed/linux-ti-omap4
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Title:
Samsung Series 900 Laptop brightness control issue (heavy flickering)
To
Great work on the fix! I can confirm it works for me on a Samsung
NP530U3C Ultrabook.
The kernel is the one from proposed:
3.2.0-31-generic #50-Ubuntu SMP Fri Sep 7 16:16:45 UTC 2012 x86_64 x86_64
x86_64 GNU/Linux
tim@t:~$ dpkg -l linux
Desired=Unknown/Install/Remove/Purge/Hold
|
This bug is awaiting verification that the kernel for Precise in
-proposed solves the problem (3.2.0-31.50). Please test the kernel and
update this bug with the results. If the problem is solved, change the
tag 'verification-needed-precise' to 'verification-done-precise'.
If verification is not
** Branch linked: lp:ubuntu/precise-proposed/linux-armadaxp
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Title:
Samsung Series 900 Laptop brightness control issue (heavy flickering)
To
Can you tell me what kernel version the fix is in? I'm currently on
3.2.0-29, will this come through in an update to 3.2.0-30?
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Title:
Samsung
** Changed in: linux (Ubuntu Precise)
Importance: Undecided = High
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Title:
Samsung Series 900 Laptop brightness control issue (heavy
@Pat,
If possible, could you test the kernel posted in comment #72? I'd like
to confirm the revert fixes this bug.
Thanks in advance.
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Title:
Confirmed that the kernel in comment #72 resolves the issue for me
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Title:
Samsung Series 900 Laptop brightness control issue (heavy flickering)
I deleted the upstream bug watch as it's written for bug 919773 which
has been unduplicated from this bug.
** Changed in: linux
Importance: Medium = Undecided
** Changed in: linux
Status: Confirmed = New
** Changed in: linux
Remote watch: Linux Kernel Bug Tracker #43031 = None
--
** Also affects: linux (Ubuntu Precise)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Quantal)
Importance: High
Assignee: Joseph Salisbury (jsalisbury)
Status: In Progress
** Changed in: linux (Ubuntu Precise)
Status: New = Fix Committed
**
@Joseph, Can you clarify where I should find the 3.2.0-26.41 kernel as
the latest SRU is at 3.2.0-29.46? I've had this bug since Oneiric. I
think it's best to unduplicate my flickering bug from this bug.
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@Joseph,
I downloaded and have been testing the kernel provided in the link
http://people.canonical.com/~jsalisbury/lp1028151/.
I would like to report that the brightness screen does not pop up, and
there is no flickering. However, my screen (and system) still freeze.
I am going to spend a
@jsalisbury #72
Samsung laptop NP300E5A-S07EE with double boot via wubi: Ubuntu 12.04 (32) W7
(64)
I was getting flickering when I was trying to reduce screen brightness from max
value (initial after installation) either via System Settings/Brightness and
Lock, either via functional keys
@papukaija,
Your model has always been in the whitelist for the samsung_laptop driver:
DMI_MATCH(DMI_SYS_VENDOR,
SAMSUNG ELECTRONICS CO., LTD.),
DMI_MATCH(DMI_PRODUCT_NAME, NC10),
DMI_MATCH(DMI_BOARD_NAME, NC10),
That would indicate that you've had this flickering bug prior to
Can folks affected by this bug as a regression in 3.2.0-27.43 test the
latest test kernel?
The test kernels can be downloaded from:
http://people.canonical.com/~jsalisbury/lp1028151/
This kernel has the following commit reverted:
9a2e71ce177a1602a0502fbcbb3f11e4bae584e4
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@papukaija, Thanks for the update. It looks like this is a key message:
samsung_laptop: enabled workaround for brightness stepping
I'll investigate further.
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@Joseph: My laptop is a Samsung NC10 (by apport: MachineType: SAMSUNG
ELECTRONICS CO., LTD. NC10). My laptop didn't flicker this morning for
my surprise. I did some further reboots, 10 in total and the screen
- flickered 4 times, dmesg shows:
[ 23.579370] samsung_laptop:
A 32-bit test kernel is now available. It would be helpful if this test
kernel can be tested. Once confirmed it resolves this bug, I will
submit the revert as an SRU.
The test kernels can be downloaded from:
http://people.canonical.com/~jsalisbury/lp1028151/
This kernel has the following
Unfortunately that kernel doesn't fix this bug, the flickering started
nearly immediately after desktop load. The dmesg doesn't say anything
about the backlight control anymore:
[ 22.906776] samsung_laptop: found laptop model 'NC10'
I guess that your test kernel doesn't include the commit
@papukaija,
The latest test kernel I posted has the following commit reverted:
9a2e71ce177a1602a0502fbcbb3f11e4bae584e4
That should prevent the samsung_laptop from getting loaded, unless your
specific model name is defined in samsung-laptop.c. Can you post what
model of laptop you have? It may
Again, I originally posted under Bug # 1028723, and was asked to test
the latest v3.5 kernel, although the link http://kernel.ubuntu.com
/~kernel-ppa/mainline/v3.6-rc1-quantal/ was to the latest v3.6 kernel.
Since installing the mainline build, my issue has not returned. I am
eager to report a
We've decided to revert the patch submitted in bug 1012284 . To keep
that patch and apply the commits mentioned in comment #49 runs the risk
of introducing further regressions.
Upstream will be notified, so we can work on getting the proper fix
there first.
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I would just like to confirm that the latest upstream kernel has fixed
the flickering/screen brightness issues on my laptop. I replaced the
needs-upstream-testing tag with kernel-fixed-upstream kernel-fixed-
upstream-/lib/modules/3.6.0-030600rc1-generic; but since my bug was
considered a copy of
I built a test kernel, which is available for download from(An amd64 kernel is
available first, but a 32-bit kernel is building now):
http://people.canonical.com/~jsalisbury/lp1028151/
This kernel has the following commit reverted:
9a2e71ce177a1602a0502fbcbb3f11e4bae584e4
Can folks affected by
My bug was tagged under this one (originally #1028723). I was asked to
test the latest upstream kernel, but I am unsure of exactly what to do.
I downloaded the i386 headers, common headers, and i386 image, ran sudo
dpkg -i *.deb, and rebooted; but there was nothing on my GRUB loader and
the
Yes, could Christopher M. Penalver (penalvch) explain why the title
change has been reverted? It has been proven in many comments that many
other series are affected, and this title change was aimed at making it
easier for other users affected by this bug to find it.
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Hello,
I've had the identical problem (to Bug #945006 18 31) on several attempted
installations of Ubuntu 12.04. Actually, no flickering but the wrong screen
resolution until I change the refresh rate from 60 (incorrect) to 75 (correct).
Then uncontrollable flickering. The wrong screen
** Summary changed:
- Samsung Laptops brightness control issue (heavy flickering)
+ Samsung Series 900 Laptop brightness control issue (heavy flickering)
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@Kevin: This bug has a patch available upstream. The patched Ubuntu
kernel is being tested, please follow the instructions from comment 49
to help us. Thanks in advance.
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Hi everyone. Ever since upgrading to Ubuntu 12.04 I had the issues
listed in the original bug description (heavy flickering for prolonged
time, eventually stopping at lowest brightness, whenever the brightness
was changed automatically or manually).
I just installed
Is there a reason this bug's summary was reverted to Series 900? It is
not limited to the Series 900, as several commenters have confirmed.
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