Christopher,
This bug is indeed still an issue on the latest 13.10 kernel : Linux
3.11.0-14-generic. I'll try to check with upstream soon but didn't find
time for that lately. However, unfortunately I don't think upstream
kernel provide change relevant to fix this issue.
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- I just updated Bios to version A09, this should not have effect according to
the matching changelog.
- Bug doesn't seems to happens or seems to be less frequent while using kernel
3.9.0.7 (to be confirmed).
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Hi,
I already patched my bios to A09 and upgraded today to the kernel:
linux-meta (3.11.0.3.4) saucy; urgency=low
* linux ABI 3.11.0-3
-- Tim Gardner tim.gard...@canonical.com Mon, 19 Aug 2013 14:42:28 +
I'll wait to see if I can reproduce with this configuration and try
mainline kernel
I could reproduce with kernel 3.11.0.3.4 and bios A09. Is there any
difference between this kernel and the one provided in your link ?
The bug doesn't seems to happens if I don't set acpi_osi=Linux
acpi_backlight=vendor in my /etc/default/grub. But I wouldn't be able
to modify lightness then.
My thought are to try with http://kernel.ubuntu.com/~kernel-
ppa/mainline/daily/current/ as v3.11-rc6-saucy seems to be older than
my current kernel
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confirmed on Linux omega 3.11.0-7-generic #14-Ubuntu SMP Mon Sep 16
18:37:27 UTC 2013 x86_64
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https://bugs.launchpad.net/bugs/1214287
Title:
[Dell Inspiron 15R 5521]
** Changed in: linux (Ubuntu)
Status: Incomplete = Confirmed
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https://bugs.launchpad.net/bugs/1225811
Title:
[Dell Inspiron 15R 5521] Can't toggle backlight
Bug tested and confirmed on 3.12.0-031200rc3-generic.
Nb: please note the previous mentioned bug is slightly linked to this
one.
** Changed in: linux (Ubuntu)
Status: Incomplete = Confirmed
** Tags removed: needs-upstream-testing
** Tags added: kernel-bug-exists-upstream
** Tags added:
I think this whole topic from lkml.org is related and describing the
issue: https://lkml.org/lkml/2013/6/9/161
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Title:
[Dell
I do believe that it's indeed a regression in the kernel.
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Title:
[Dell Inspiron 15R 5521] suspend/resume failure
Status in
I just tried using a live ubuntu 13.04. I couldn't reproduce with the
crash on resume either using acpi_backlight=vendor or without.
However, you still can't control the lightness without it.
Please note that it was a live 13.04 using 3.8.0.19 kernel and default
configuration.
My previous
Christopher, according to my tests, so far the problem is only
reproducible when the parameter acpi_backlight=vendor is present.
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acpi_osi=Linux is not useful actually, and i removed it from my grub config.
acpi_backlight=vendor is required on raring and saucy at least if I want to
be able to manage the backlight. Precise and quantal could be affected as well.
I have to check to see if the problem as always been there.
Public bug reported:
Since raring at least, it is not possible to setup backlight lightness
without adding acpi_backlight=vendor into grub boot option.
ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: linux-image-generic 3.11.0.7.8
ProcVersionSignature: Ubuntu 3.11.0-5.11-generic 3.11.0
As (probably) a large number of user on linux right now, I'm using the
following workaround to handle this issue:
'echo 4590 /sys/class/backlight/intel_backlight/brightness' as root
another option might be to use the following xrandr command:
xrandr --output [yourscreendevice]
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xrandr --output [yourscreendevice] --set Backlight 80
However, in my case (maybe because I have 2 video adapter [cpu/amd] )
the latter xrandr command is equivalent to write in
/sys/class/backlight/acpi_video0/brightness which doesn't work.
** Changed in: linux (Ubuntu)
Status: Expired =
This bug has been fixed in Ubuntu LTS 14.04 providing kernel
3.13.0-24-generic .
** Changed in: linux (Ubuntu)
Status: Confirmed = Fix Released
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Tested on 3.12.0-031200-generic and issue is still present.
** Changed in: linux (Ubuntu)
Status: Expired = New
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Title:
This issue is now fixed for me with recents kernels on Ubuntu 14.04. I'm
currently using 3.13.0-32-generic.
My amd fglrx driver is 2:13.350.1-0ubuntu2
My intel driver is i915-3.15-3.13-dkms
I have GRUB_CMDLINE_LINUX=video.use_native_backlight=1 into my
/etc/default/grub
Everything seems to work
nb: I'm using the following PPA for the intel driver:
deb https://download.01.org/gfx/ubuntu/14.04/main trusty main #Intel Graphics
drivers
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** Attachment added: "version.txt"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1819486/+attachment/5245481/+files/version.txt
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** Attachment added: "lspci.txt"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1819486/+attachment/5245482/+files/lspci.txt
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** Attachment added: "kernelst.txt"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1819486/+attachment/5245483/+files/kernelst.txt
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Public bug reported:
While previously working using 4.15.0-45-generic, booting my thinkpad
T480 on a dock with additional screen connected and "kernel
4.15.0-46-generic" lead to a crash of the system.
Laptop is running Ubuntu 18.04.2 LTS.
** Affects: linux (Ubuntu)
Importance: Undecided
pff, clearly I needed one cup of coffee before answering this.. sry. I
will check again shortly..
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Title:
Crash from :i915 module
Kai, It looks like that the intel driver was not bundle in this kernel?
No kernel panic but WM runs in software mode and additional display are
not being detected.
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Yeah, it works fine with your module. Did you just revert "drm-i915-fix-
hotplug-irq-ack-on-i965-g4x.patch" ?
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Title:
Crash from
apport information
** Attachment added: "PulseList.txt"
https://bugs.launchpad.net/bugs/1819486/+attachment/5245528/+files/PulseList.txt
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apport information
** Attachment added: "CurrentDmesg.txt"
https://bugs.launchpad.net/bugs/1819486/+attachment/5245519/+files/CurrentDmesg.txt
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apport information
** Attachment added: "UdevDb.txt"
https://bugs.launchpad.net/bugs/1819486/+attachment/5245530/+files/UdevDb.txt
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apport information
** Attachment added: "Lspci.txt"
https://bugs.launchpad.net/bugs/1819486/+attachment/5245521/+files/Lspci.txt
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apport information
** Attachment added: "ProcModules.txt"
https://bugs.launchpad.net/bugs/1819486/+attachment/5245527/+files/ProcModules.txt
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apport information
** Attachment added: "IwConfig.txt"
https://bugs.launchpad.net/bugs/1819486/+attachment/5245520/+files/IwConfig.txt
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apport information
** Changed in: linux (Ubuntu)
Status: Incomplete => New
** Tags added: apport-collected
** Description changed:
While previously working using 4.15.0-45-generic, booting my thinkpad
T480 on a dock with additional screen connected and "kernel
4.15.0-46-generic"
apport information
** Attachment added: "ProcInterrupts.txt"
https://bugs.launchpad.net/bugs/1819486/+attachment/5245526/+files/ProcInterrupts.txt
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apport information
** Attachment added: "Lsusb.txt"
https://bugs.launchpad.net/bugs/1819486/+attachment/5245522/+files/Lsusb.txt
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apport information
** Attachment added: "ProcEnviron.txt"
https://bugs.launchpad.net/bugs/1819486/+attachment/5245525/+files/ProcEnviron.txt
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apport information
** Attachment added: "WifiSyslog.txt"
https://bugs.launchpad.net/bugs/1819486/+attachment/5245531/+files/WifiSyslog.txt
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apport information
** Attachment added: "ProcCpuinfo.txt"
https://bugs.launchpad.net/bugs/1819486/+attachment/5245523/+files/ProcCpuinfo.txt
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apport information
** Attachment added: "ProcCpuinfoMinimal.txt"
https://bugs.launchpad.net/bugs/1819486/+attachment/5245524/+files/ProcCpuinfoMinimal.txt
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apport information
** Attachment added: "RfKill.txt"
https://bugs.launchpad.net/bugs/1819486/+attachment/5245529/+files/RfKill.txt
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apport information
** Attachment added: "CRDA.txt"
https://bugs.launchpad.net/bugs/1819486/+attachment/5245518/+files/CRDA.txt
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** Attachment removed: "CurrentDmesg.txt"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1819486/+attachment/5245519/+files/CurrentDmesg.txt
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Hello,
It works fine with the proposed kernel 4.15.0-48-generic taken at:
http://ppa.launchpad.net/canonical-kernel-
team/proposed/ubuntu/pool/main/l/linux/
Please note that I updated to the latest Lenovo Provided Bios (1.23)
since then.
** Description changed:
=== SRU Justification ===
Hi,
This bug was present and fixed by reverting the i915 patch. I don't
understand why it status would be changed to invalid.
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Public bug reported:
Since a few versions of the kernel I'm losing the screen connected to my
dockstation thinkpad using displayport. My running laptop is a thinkpad
T14s
I'm currently running
"Linux laptop 5.19.0-28-generic #29~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Thu Dec
15 12:05:40 UTC 2
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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Title:
i915: loss of the screen connected in DP to my
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