adam, thank you for reporting this and helping make Ubuntu better.
Could you please undo your WORKAROUND and test the latest upstream
kernel available from the very top line at the top of the page from
http://kernel.ubuntu.com/~kernel-ppa/mainline/?C=N;O=D (the release
names are irrelevant for testing, and please do not test the daily
folder)? Install instructions are available at
https://wiki.ubuntu.com/Kernel/MainlineBuilds . This will allow
additional upstream developers to examine the issue.
If the latest kernel did not allow you to test to the issue (ex. you couldn't
boot into the OS) please make a comment in your report about this, and continue
to test the next most recent kernel version until you can test to the issue.
Once you've tested the upstream kernel, please comment on which kernel version
specifically you tested. If this issue is fixed in the mainline kernel, please
add the following tags by clicking on the yellow circle with a black pencil
icon, next to the word Tags, located at the bottom of the report description:
kernel-fixed-upstream
kernel-fixed-upstream-X.Y-rcZ
Where X, and Y are two numbers corresponding to the kernel version, and
Z is one release candidate number if applicable.
If the mainline kernel does not fix the issue, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-X.Y-rcZ
Please note, an error to install the kernel does not fit the criteria of
kernel-bug-exists-upstream.
Once testing of the latest upstream kernel is complete, please mark this
report's Status as Confirmed. Please let us know your results.
Thank you for your understanding.
** Changed in: linux (Ubuntu)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
** Changed in: linux (Ubuntu)
Assignee: arun (arungpurohit) => (unassigned)
** Description changed:
Option stopped working after upgrading to 15.10, full light all time
(before with some hacking it was working, but still was lacking keeping
- the levels between reboots)
+ the levels between reboots).
+
+ WORKAROUND: Add kernel parameter:
+ acpi_osi=
ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: linux-image-4.2.0-18-generic 4.2.0-18.22
ProcVersionSignature: Ubuntu 4.2.0-18.22-generic 4.2.3
Uname: Linux 4.2.0-18-generic x86_64
ApportVersion: 2.19.1-0ubuntu4
Architecture: amd64
AudioDevicesInUse:
- USER PID ACCESS COMMAND
- /dev/snd/controlC0: ab 2051 F.... pulseaudio
+ USER PID ACCESS COMMAND
+ /dev/snd/controlC0: ab 2051 F.... pulseaudio
CurrentDesktop: KDE
Date: Sat Nov 14 22:44:57 2015
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=33abcad5-3750-4855-b97b-2d5b0fb864ee
InstallationDate: Installed on 2013-10-24 (751 days ago)
InstallationMedia: Kubuntu 13.10 "Saucy Salamander" - Release amd64
(20131016.1)
MachineType: SAMSUNG ELECTRONICS CO., LTD. 530U4E/540U4E
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-18-generic
root=UUID=f467e962-e87d-4a39-a861-79138b4809d1 ro quiet splash resume=/dev/sdb2
vt.handoff=7
RelatedPackageVersions:
- linux-restricted-modules-4.2.0-18-generic N/A
- linux-backports-modules-4.2.0-18-generic N/A
- linux-firmware 1.149.2
+ linux-restricted-modules-4.2.0-18-generic N/A
+ linux-backports-modules-4.2.0-18-generic N/A
+ linux-firmware 1.149.2
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/05/2013
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P07ACM.063.130905.dg
dmi.board.asset.tag: No Asset Tag
dmi.board.name: NP530U4E-K02PL
dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.board.version: SEC_SW_REVISION_1234567890ABCD
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 9
dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.chassis.version: N/A
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrP07ACM.063.130905.dg:bd09/05/2013:svnSAMSUNGELECTRONICSCO.,LTD.:pn530U4E/540U4E:pvrP07ACM:rvnSAMSUNGELECTRONICSCO.,LTD.:rnNP530U4E-K02PL:rvrSEC_SW_REVISION_1234567890ABCD:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvrN/A:
dmi.product.name: 530U4E/540U4E
dmi.product.version: P07ACM
dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.
** Tags added: regression-release
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1516320
Title:
Cannot change backlight on my laptop
Status in linux package in Ubuntu:
Incomplete
Bug description:
Option stopped working after upgrading to 15.10, full light all time
(before with some hacking it was working, but still was lacking
keeping the levels between reboots).
WORKAROUND: Add kernel parameter:
acpi_osi=
ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: linux-image-4.2.0-18-generic 4.2.0-18.22
ProcVersionSignature: Ubuntu 4.2.0-18.22-generic 4.2.3
Uname: Linux 4.2.0-18-generic x86_64
ApportVersion: 2.19.1-0ubuntu4
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: ab 2051 F.... pulseaudio
CurrentDesktop: KDE
Date: Sat Nov 14 22:44:57 2015
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=33abcad5-3750-4855-b97b-2d5b0fb864ee
InstallationDate: Installed on 2013-10-24 (751 days ago)
InstallationMedia: Kubuntu 13.10 "Saucy Salamander" - Release amd64
(20131016.1)
MachineType: SAMSUNG ELECTRONICS CO., LTD. 530U4E/540U4E
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.2.0-18-generic
root=UUID=f467e962-e87d-4a39-a861-79138b4809d1 ro quiet splash resume=/dev/sdb2
vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-4.2.0-18-generic N/A
linux-backports-modules-4.2.0-18-generic N/A
linux-firmware 1.149.2
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/05/2013
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P07ACM.063.130905.dg
dmi.board.asset.tag: No Asset Tag
dmi.board.name: NP530U4E-K02PL
dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.board.version: SEC_SW_REVISION_1234567890ABCD
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 9
dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.chassis.version: N/A
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvrP07ACM.063.130905.dg:bd09/05/2013:svnSAMSUNGELECTRONICSCO.,LTD.:pn530U4E/540U4E:pvrP07ACM:rvnSAMSUNGELECTRONICSCO.,LTD.:rnNP530U4E-K02PL:rvrSEC_SW_REVISION_1234567890ABCD:cvnSAMSUNGELECTRONICSCO.,LTD.:ct9:cvrN/A:
dmi.product.name: 530U4E/540U4E
dmi.product.version: P07ACM
dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.
To manage notifications about this bug go to:
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