No one seemes to care. Last update on our end was April 2013 and that
is that. If this is an issue for the cert team, they can file a new bug
but I doubt that will occur.
** Changed in: linux (Ubuntu)
Status: Incomplete = Won't Fix
** Changed in: linux (Ubuntu Precise)
Status:
Jeff Lane, this bug was reported a while ago and there hasn't been any
activity in it recently. We were wondering if this is still an issue? If
so, could you please test for this with the latest development release
of Ubuntu? ISO images are available from http://cdimage.ubuntu.com
** Changed in: linux (Ubuntu Quantal)
Status: Incomplete = New
** Changed in: linux (Ubuntu Quantal)
Status: New = Confirmed
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Title:
** Changed in: linux (Ubuntu Quantal)
Assignee: Joseph Salisbury (jsalisbury) = (unassigned)
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Title:
[Lenovo E420s] Hitting brightness keys
I also have this problem, except only the brightness up key causes it.
The brightness down key does not cause a problem, indeed it actually
lowers the brightness of the screen.
I have tried the 3.8.5 and 3.5.0 kernels.
The crash can be triggered at any time after booting the kernel, but the
dcunnin@tyrion:~$ cat /proc/version_signature
Ubuntu 3.5.0-26.42-generic 3.5.7.6
dcunnin@tyrion:~$ sudo lspci -vnvn
[sudo] password for dcunnin:
00:00.0 Host bridge [0600]: Intel Corporation 2nd Generation Core Processor
Family DRAM Controller [8086:0104] (rev 09)
Subsystem: Lenovo
I tried echo 10 /sys/class/backlight/acpi_video0/brightness and this
also crashed the system.
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Title:
[Lenovo E420s] Hitting brightness keys
See: Bug: Advanced battery query causes EC hang
http://www.thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_issues
I am going to try upgrading my bios, but this is tricky because it
requires windows and I am not running windows.
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Updated the bios with a boot cd -- did not make any noticeable
difference
[ 30.711907] thinkpad_acpi: ThinkPad BIOS 8BET60WW (1.40 ), EC unknown
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This bug is a duplicate of
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/776999
I can confirm the following workaround allows full brightness control:
nox2apic kernel param
AND
In Device section of xorg.conf:
Option RegistryDwords EnableBrightnessControl=1
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@Jeff,
Yes the kernel I posed at
http://people.canonical.com/~jsalisbury/lp992720 had an rc4 tag in the
name. That is because they are built during the bisect process, which
does a process of elimination jumping from newer to older kernels.
The v3.8 kernel is now avaiable. Can you test that
@Rolf,
The kernels that were uploaded by Joseph were for rc4,
However I noted that rc5 fails as well.
** Changed in: linux (Ubuntu)
Status: Incomplete = New
** Changed in: linux (Ubuntu Quantal)
Status: Incomplete = New
** Changed in: linux (Ubuntu Precise)
Status:
** Tags added: regression-release
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Title:
[Lenovo E420s] Hitting brightness keys causes machine to lock up
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Jeff, can you please let us know if the provided kernels fix the issue
for you?
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Title:
[Lenovo E420s] Hitting brightness keys causes machine to
** Changed in: linux (Ubuntu Quantal)
Status: Confirmed = Incomplete
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Title:
[Lenovo E420s] Hitting brightness keys causes machine to lock
Sorry, Jeff. I just uploaded the test kernels to:
http://people.canonical.com/~jsalisbury/lp992720
** Changed in: linux (Ubuntu Precise)
Status: Confirmed = Incomplete
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Hi Joseph, the test kernel directory seems to be empty, however I tested
3.6rc5 (the most recent) and the machine locks up when changing the
brightness setttings.
** Changed in: linux (Ubuntu Precise)
Status: Incomplete = Confirmed
** Changed in: linux (Ubuntu Quantal)
Status:
** Tags added: quantal
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Title:
[Lenovo E420s] Hitting brightness keys causes machine to lock up
To manage notifications about this bug go to:
I've reviewed some of the tests that were performed for this bug. To
summarize:
v3.2-rc1: Has bug.
v3.2-rc2 through v3.2-rc4: Do not have bug.
v3.2-rc5: Has bug again.
I think we should actually be bisecting between v3.2-rc4 and v3.2-rc5.
I'll start the bisect and post a test kernel shortly.
I built a test kernel, which is up to commit:
232ea344550c4a099d35d9df552509d6748a31c0
The kernel can be downloaded from:
http://people.canonical.com/~jsalisbury/lp992720
Can you test that kernel and comment back if it has the bug or not?
Also, v3.6-rc2[0] is now available. Can you also test
** Changed in: linux (Ubuntu Precise)
Status: Confirmed = Incomplete
** Changed in: linux (Ubuntu Quantal)
Status: Confirmed = Incomplete
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I built the next test kernel, which is up to commit:
c8c27c955ac633c0d783ec65f65176c82809f04d
The kernel can be downloaded from:
http://people.canonical.com/~jsalisbury/lp992720
Can you test that kernel and comment back if it has the bug or not?
Thanks
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Tested with the following: linux-
image-3.2.0-030200rc1-generic_3.2.0-030200rc1.201208101902_amd64.deb
and the bug is present.
** Changed in: linux (Ubuntu Precise)
Status: Incomplete = Confirmed
** Changed in: linux (Ubuntu Quantal)
Status: Incomplete = Confirmed
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Hi Jeff,
I started a bisect between v3.2-rc1 and v3.2-rc2. The first test kernel is
built up to commit:
fe10e6f4b24ef8ca12cb4d2368deb4861ab1861b
This kernel is available from:
http://people.canonical.com/~jsalisbury/lp992720
Can you test that kernel and report back if it has the bug or not?
http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.2-rc5-oneiric/
Bug begins at 3.2-rc5
** Changed in: linux (Ubuntu Precise)
Status: Incomplete = New
** Changed in: linux (Ubuntu Quantal)
Status: Incomplete = New
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** Changed in: linux (Ubuntu)
Status: New = Confirmed
** Changed in: linux (Ubuntu Precise)
Status: New = Confirmed
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Title:
I was able to test this with 3.2 rc2 and the machine is still stable when
adjusting brightness with the key.
** Changed in: linux (Ubuntu Precise)
Status: Incomplete = New
** Changed in: linux (Ubuntu Quantal)
Status: Incomplete = New
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** Changed in: linux (Ubuntu)
Status: New = Confirmed
** Changed in: linux (Ubuntu Precise)
Status: New = Confirmed
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Title:
It sounds like this bug was fixed in v3.2-rc1 and then another
regression was introduced at some point.
Since v3.2-rc2 also works, can you test some of the later release
candidates to identify the first one that introduced this bug? For
example, -rc3, rc4, etc:
v3.2-rc3:
Can you confirm that v3.2-rc2 fails? If we can confirm that, I will
bisect between rc1 and rc2.
v3.2-rc2: http://kernel.ubuntu.com/~kernel-
ppa/mainline/v3.2-rc2-oneiric/
** Changed in: linux (Ubuntu Precise)
Status: Triaged = Confirmed
** Changed in: linux (Ubuntu Quantal)
** Changed in: linux (Ubuntu Quantal)
Assignee: (unassigned) = Joseph Salisbury (jsalisbury)
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Title:
[Lenovo E420s] Hitting brightness keys
** Tags removed: needs-bisect
** Tags added: performing-bisect
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Title:
[Lenovo E420s] Hitting brightness keys causes machine to lock up
To
@Joseph,
Hi! i've retested this with: v3.1 (fails) and also v3.2-rc1 (WORKS!)
- however, any later kernel release for precise is broken and still
causes the brightness key lockup. I also tested the v3.4-rc6-precise and
that produces the same problem. Please advise. Thanks!
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** Tags added: needs-bisect
** Changed in: linux (Ubuntu Precise)
Status: Incomplete = Triaged
** Changed in: linux (Ubuntu Quantal)
Status: Incomplete = Triaged
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This issue appears to be an upstream bug, since you tested the latest
upstream kernel. Would it be possible for you to open an upstream bug
report at bugzilla.kernel.org [1]? That will allow the upstream
Developers to examine the issue, and may provide a quicker resolution to
the bug.
If you
@Jeff,
Do you happen to the if there was an earlier kernel that did not exhibit
this bug?
** Tags added: kernel-da-key
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Title:
[Lenovo E420s]
Can you test the v3.1 kernel and see if the bug exists there?
v3.1: http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.1-oneiric/
If it does not exist there, can you test v3.2-rc2:
v3.2-rc1: http://kernel.ubuntu.com/~kernel-
ppa/mainline/v3.2-rc1-oneiric/
** Changed in: linux (Ubuntu Precise)
@Joeseph: This test was not marked as a failure or a problem on Natty
and Oneiric certification testing, so seems to be precise and later only
(assuming it's recreated in Quantal as well).
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Greg or Jeff, can you test with the mainline kernel as requested by
Joseph?
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Title:
[Lenovo E420s] Hitting brightness keys causes machine to lock
Retested this with 3.5.0 Quantal and the issue still exists.
** Tags removed: needs-upstream-testing
** Tags added: kernel-bug-exists-upstream
** Changed in: linux (Ubuntu Quantal)
Status: Incomplete = New
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** Changed in: linux (Ubuntu)
Status: New = Confirmed
** Changed in: linux (Ubuntu Precise)
Status: New = Confirmed
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Title:
Removing the rls-q-incoming tag until we have proper confirmation for
Quantal.
** Changed in: linux (Ubuntu Precise)
Status: Incomplete = New
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** Tags removed: rls-q-incoming
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Title:
[Lenovo E420s] Hitting brightness keys causes machine to lock up
To manage notifications about this bug
** Also affects: linux (Ubuntu Quantal)
Importance: Medium
Status: Incomplete
** Changed in: linux (Ubuntu Precise)
Status: New = Incomplete
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** Changed in: linux (Ubuntu Precise)
Importance: Undecided = Medium
** Changed in: linux (Ubuntu Quantal)
Importance: Medium = Undecided
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** Also affects: linux (Ubuntu Precise)
Importance: Undecided
Status: New
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Title:
[Lenovo E420s] Hitting brightness keys causes machine
** Tags added: rls-q-incoming
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Title:
[Lenovo E420s] Hitting brightness keys causes machine to lock up
To manage notifications about this bug go
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Title:
[Lenovo E420s] Hitting brightness keys causes machine to lock up
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** Changed in: linux (Ubuntu)
Status: New = Confirmed
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Title:
[Lenovo E420s] Hitting brightness keys causes machine to lock up
To manage
Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v3.4kernel[1] (Not a kernel in the daily directory). Once you've tested
the upstream kernel, please remove the 'needs-upstream-testing' tag(Only
that
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