Ubuntu
linux package

[Lenovo ThinkPad T530] Backlight not adjustable

Bug #1324529 reported by Eli Fox-Epstein on 2014-05-29

This bug affects 1 person

Affects		Status	Importance	Assigned to	Milestone
	linux (Ubuntu)	Expired	Low	Unassigned

Bug Description

Running 14.04, just upgraded. I can no longer adjust my backlight on my ThinkPad T530. I am attaching a number of files as requested in https://wiki.ubuntu.com/Kernel/Debugging/Backlight. See also: http://askubuntu.com/questions/473660/brightness-keys-no-longer-work

Note that /sys/class/backlight is empty unless acpi_backlight=vendor is set.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-27-generic 3.13.0-27.50
ProcVersionSignature: Ubuntu 3.13.0-27.50-generic 3.13.11
Uname: Linux 3.13.0-27-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: eli 3150 F.... pulseaudio
CurrentDmesg: Error: command ['sh', '-c', 'dmesg | comm -13 --nocheck-order /var/log/dmesg -'] failed with exit code 1: comm: /var/log/dmesg: Permission denied
Date: Thu May 29 08:43:12 2014
InstallationDate: Installed on 2012-11-02 (572 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
MachineType: LENOVO 2359CTO
ProcFB:

ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-27-generic root=UUID=4666fbf8-118b-4336-bc4b-54c0e7dfd118 ro nosplash nomodeset video.use_native_backlight=1
RfKill:
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
SourcePackage: linux
UpgradeStatus: Upgraded to trusty on 2014-05-25 (3 days ago)
WifiSyslog:

dmi.bios.date: 09/13/2012
dmi.bios.vendor: LENOVO
dmi.bios.version: G4ET62WW (2.04 )
dmi.board.asset.tag: Not Available
dmi.board.name: 2359CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvrG4ET62WW(2.04):bd09/13/2012:svnLENOVO:pn2359CTO:pvrThinkPadT530:rvnLENOVO:rn2359CTO:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 2359CTO
dmi.product.version: ThinkPad T530
dmi.sys.vendor: LENOVO
---
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: eli 3150 F.... pulseaudio
/dev/snd/pcmC0D0p: eli 3150 F...m pulseaudio
/dev/snd/timer: eli 3150 f.... pulseaudio
CurrentDmesg:
Error: command ['sh', '-c', 'dmesg | comm -13 --nocheck-order /var/log/dmesg -'] failed with exit code 1: comm: /var/log/dmesg: Permission denied
dmesg: write failed: Broken pipe
DistroRelease: Ubuntu 14.04
InstallationDate: Installed on 2012-11-02 (572 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
MachineType: LENOVO 2359CTO
Package: linux 3.11.0.20.21 [origin: unknown]
PackageArchitecture: amd64
ProcFB:

ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-27-generic root=UUID=4666fbf8-118b-4336-bc4b-54c0e7dfd118 ro nosplash nomodeset video.use_native_backlight=1
ProcVersionSignature: Ubuntu 3.13.0-27.50-generic 3.13.11
RfKill:
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
Tags: trusty third-party-packages
Uname: Linux 3.13.0-27-generic x86_64
UnreportableReason: This is not an official Ubuntu package. Please remove any third party package and try again.
UpgradeStatus: Upgraded to trusty on 2014-05-25 (3 days ago)
UserGroups: bumblebee lpadmin sudo vboxusers
WifiSyslog:

_MarkForUpload: True
dmi.bios.date: 09/13/2012
dmi.bios.vendor: LENOVO
dmi.bios.version: G4ET62WW (2.04 )
dmi.board.asset.tag: Not Available
dmi.board.name: 2359CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Defined
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvrG4ET62WW(2.04):bd09/13/2012:svnLENOVO:pn2359CTO:pvrThinkPadT530:rvnLENOVO:rn2359CTO:rvrNotDefined:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 2359CTO
dmi.product.version: ThinkPad T530
dmi.sys.vendor: LENOVO

See original description

Tags:

Revision history for this message

Eli Fox-Epstein (eli-m) wrote on 2014-05-29:

A tar of the files requested from the Backlight wiki page Edit (1.2 MiB, application/x-tar)
AlsaInfo.txt Edit (27.5 KiB, text/plain; charset="utf-8")
CRDA.txt Edit (257 bytes, text/plain; charset="utf-8")
Dependencies.txt Edit (3.1 KiB, text/plain; charset="utf-8")
HookError_source_linux.txt Edit (453 bytes, text/plain; charset="utf-8")
IwConfig.txt Edit (511 bytes, text/plain; charset="utf-8")
Lspci.txt Edit (11.3 KiB, text/plain; charset="utf-8")
Lsusb.txt Edit (490 bytes, text/plain; charset="utf-8")
ProcCpuinfo.txt Edit (7.5 KiB, text/plain; charset="utf-8")
ProcEnviron.txt Edit (134 bytes, text/plain; charset="utf-8")
ProcInterrupts.txt Edit (3.3 KiB, text/plain; charset="utf-8")
ProcModules.txt Edit (4.0 KiB, text/plain; charset="utf-8")
PulseList.txt Edit (14.5 KiB, text/plain; charset="utf-8")
UdevDb.txt Edit (132.8 KiB, text/plain; charset="utf-8")
UdevLog.txt Edit (305.6 KiB, text/plain; charset="utf-8")

Revision history for this message

Brad Figg (brad-figg) wrote on 2014-05-29: Missing required logs.

This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:

apport-collect 1324529

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

Changed in linux (Ubuntu):
status:	New → Incomplete

Revision history for this message

Eli Fox-Epstein (eli-m) wrote on 2014-05-29: AlsaInfo.txt

AlsaInfo.txt Edit (27.7 KiB, text/plain)

apport information

tags:	added: apport-collected third-party-packages
description:	updated

Revision history for this message

Eli Fox-Epstein (eli-m) wrote on 2014-05-29: CRDA.txt

CRDA.txt Edit (257 bytes, text/plain)

apport information

Revision history for this message

Eli Fox-Epstein (eli-m) wrote on 2014-05-29: Dependencies.txt

Dependencies.txt Edit (3.6 KiB, text/plain)

apport information

Revision history for this message

Eli Fox-Epstein (eli-m) wrote on 2014-05-29: HookError_source_linux_meta.txt

HookError_source_linux_meta.txt Edit (447 bytes, text/plain)

apport information

Revision history for this message

Eli Fox-Epstein (eli-m) wrote on 2014-05-29: IwConfig.txt

IwConfig.txt Edit (511 bytes, text/plain)

apport information

Revision history for this message

Eli Fox-Epstein (eli-m) wrote on 2014-05-29: Lspci.txt

Lspci.txt Edit (11.3 KiB, text/plain)

apport information

Revision history for this message

Eli Fox-Epstein (eli-m) wrote on 2014-05-29: Lsusb.txt

Lsusb.txt Edit (490 bytes, text/plain)

apport information

Revision history for this message

Eli Fox-Epstein (eli-m) wrote on 2014-05-29: ProcCpuinfo.txt

#10

ProcCpuinfo.txt Edit (7.5 KiB, text/plain)

apport information

Revision history for this message

Eli Fox-Epstein (eli-m) wrote on 2014-05-29: ProcEnviron.txt

#11

ProcEnviron.txt Edit (134 bytes, text/plain)

apport information

Revision history for this message

Eli Fox-Epstein (eli-m) wrote on 2014-05-29: ProcInterrupts.txt

#12

ProcInterrupts.txt Edit (3.3 KiB, text/plain)

apport information

Revision history for this message

Eli Fox-Epstein (eli-m) wrote on 2014-05-29: ProcModules.txt

#13

ProcModules.txt Edit (4.0 KiB, text/plain)

apport information

Revision history for this message

Eli Fox-Epstein (eli-m) wrote on 2014-05-29: PulseList.txt

#14

PulseList.txt Edit (16.0 KiB, text/plain)

apport information

Revision history for this message

Eli Fox-Epstein (eli-m) wrote on 2014-05-29: UdevDb.txt

#15

UdevDb.txt Edit (132.8 KiB, text/plain)

apport information

Revision history for this message

Eli Fox-Epstein (eli-m) wrote on 2014-05-29: UdevLog.txt

#16

UdevLog.txt Edit (305.6 KiB, text/plain)

apport information

Revision history for this message

Eli Fox-Epstein (eli-m) wrote on 2014-05-29: Re: Backlight not adjustable

#17

dmesg Edit (4.3 KiB, text/plain)

Since the bug report failed to get dmesg for some permissions issues, here it is.

Changed in linux (Ubuntu):
status:	Incomplete → Confirmed

Revision history for this message

Joseph Salisbury (jsalisbury) wrote on 2014-05-29:

#18

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.15 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 this bug, please add the tag: 'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.15-rc7-utopic/

Changed in linux (Ubuntu):
importance:	Undecided → Medium
status:	Confirmed → Incomplete

Revision history for this message

Eli Fox-Epstein (eli-m) wrote on 2014-05-29:

#19

Hi Joseph, I don't really feel comfortable installing a new kernel. I'm adding the 'kernel-unable-to-test-upstream' tag.

tags:

added: kernel-unable-to-test-upstream

penalvch (penalvch) on 2014-05-30

tags:	added: bios-outdated-2.60
Changed in linux (Ubuntu):
importance:	Medium → Critical
importance:	Critical → Low
summary:	- Backlight not adjustable + [Lenovo ThinkPad T530] Backlight not adjustable
tags:	added: regression-release

Revision history for this message

penalvch (penalvch) wrote on 2014-05-30:

#20

Eli Fox-Epstein, if you remove all non-default kernel boot parameters (ex. nomodeset video.use_native_backlight=1) does this change anything?

tags:

added: needs-utopic-test

Revision history for this message

Eli Fox-Epstein (eli-m) wrote on 2014-05-30:

#21

Hi Christopher, some combination of removing all of the kernel boot parameters and installing the nvidia drivers in ppa:xorg-edgers has fixed the brightness issue. The hotkeys now correctly adjust it. Now, there are 3 entries in /sys/class/backlight and echoing a number into any of their ./brightness things works to adjust it.

Revision history for this message

penalvch (penalvch) wrote on 2014-05-31:

#22

Eli Fox-Epstein, if you don't install the nvidia drivers from ppa:xorg-edgers, are you able to adjust the backlight?

Revision history for this message

Eli Fox-Epstein (eli-m) wrote on 2014-06-17:

#23

Hi Christopher,

Sorry for the delays, I've been traveling. Do you want me to uninstall nvidia-304 nvidia-current bumblebee-nvidia and see what happens?

Revision history for this message

Launchpad Janitor (janitor) wrote on 2014-08-17:

#24

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]

Changed in linux (Ubuntu):
status:	Incomplete → Expired

Revision history for this message

penalvch (penalvch) wrote on 2014-08-25:

#25

Eli Fox-Epstein, could you please test http://cdimage.ubuntu.com/daily-live/current/ and advise to the results?

Changed in linux (Ubuntu):
status:	Expired → Incomplete

Revision history for this message

Launchpad Janitor (janitor) wrote on 2014-10-25:

#26

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]

Changed in linux (Ubuntu):
status:	Incomplete → Expired

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[Lenovo ThinkPad T530] Backlight not adjustable

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