[Dell XPS L322X] Backlight control problems (3.8.0-25-generic #37-Ubuntu SMP)

Bug #1179315 reported by Luis Angel Vicente Sanchez on 2013-05-12
This bug affects 5 people
Affects Status Importance Assigned to Milestone
linux (Ubuntu)

Bug Description

After upgrading to 3.8.0-20.31 kernel my backlight control stopped working. It was working on previous versions of the kernel. I know other people reported this bug before and that 3.8.0-20.31 kernel was suppose to fix it; but in my case it was working before and this update broke it.

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: linux-image (not installed)
ProcVersionSignature: Ubuntu 3.8.0-20.31-generic 3.8.11
Uname: Linux 3.8.0-20-generic x86_64
ApportVersion: 2.9.2-0ubuntu8
Architecture: amd64
 /dev/snd/controlC0: langelvs 1672 F.... pulseaudio
 country DE:
  (2400 - 2483 @ 40), (N/A, 20)
  (5150 - 5250 @ 40), (N/A, 20), NO-OUTDOOR
  (5250 - 5350 @ 40), (N/A, 20), NO-OUTDOOR, DFS
  (5470 - 5725 @ 40), (N/A, 26), DFS
Date: Mon May 13 00:00:44 2013
HibernationDevice: RESUME=UUID=532a06d0-3beb-47ba-977e-17b09d32f193
MachineType: Dell Inc. Dell System XPS L322X
MarkForUpload: True
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-20-generic root=UUID=79a15acb-470b-40a5-b2b6-118e7cbe0656 ro quiet splash vt.handoff=7
 linux-restricted-modules-3.8.0-20-generic N/A
 linux-backports-modules-3.8.0-20-generic N/A
 linux-firmware 1.106
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/22/2013
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A07
dmi.board.name: 0PJHXN
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: 0.1
dmi.modalias: dmi:bvnDellInc.:bvrA07:bd01/22/2013:svnDellInc.:pnDellSystemXPSL322X:pvr:rvnDellInc.:rn0PJHXN:rvrA00:cvnDellInc.:ct8:cvr0.1:
dmi.product.name: Dell System XPS L322X
dmi.sys.vendor: Dell Inc.

This change was made by a bot.

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

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.10 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/v3.10-rc1-saucy/

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

I've tested the latest 3.10 kernel and nothing changed. I will upload a apport-collect report.

tags: added: kernel-bug-exists-upstream
Changed in linux (Ubuntu):
status: Incomplete → Confirmed
tags: added: apport-collected
description: updated

It seems I could not upoad an apport-collect report; anyway backlight control is not working with 3.10.0-031000rc1-generic #201305130510. I've added the tag and marked it as 'Confirmed'

After updating to 3.8.0-21-generic #32-Ubuntu SMP it's working again.

After updating to 3.8.0-22-generic #33-Ubuntu SMP it's not working... really confused.

summary: - Backlight control problems (3.8.0-20.31 kernel)
+ Backlight control problems (3.8.0-22-generic #33-Ubuntu SMP)

Upgraded to 3.8.0-23-generic #34-Ubuntu SMP, still not working.

summary: - Backlight control problems (3.8.0-22-generic #33-Ubuntu SMP)
+ Backlight control problems (3.8.0-23-generic #34-Ubuntu SMP)

I have the same problem, after updated to kernel 3.8.0-23-generic, the backlight control stops working. I have to stick with 3.5 kernel, otherwise, eyes will be damaged.

hardware: dell xps ultrabook 13' with intel hd 3000?

Upgrade to 3.8.0-25-generic #37-Ubuntu SMP, still NOT working.

summary: - Backlight control problems (3.8.0-23-generic #34-Ubuntu SMP)
+ Backlight control problems (3.8.0-25-generic #37-Ubuntu SMP)

Luis Angel Vicente Sanchez, as per http://www.dell.com/support/troubleshooting/us/en/19/Product/xps-13-l321x-mlk an update is available for your BIOS (A09). If you update to this, does it change anything?

If not, could you please both specify what happened, and provide the output of the following terminal command:
sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date

Thank you for your understanding.

tags: added: regression-update
description: updated
tags: added: bios-outdated-a09 kernel-bug-exists-upstream-v3.10-rc1 needs-upstream-testing
removed: kernel-bug-exists-upstream
Changed in linux (Ubuntu):
status: Confirmed → Incomplete
summary: - Backlight control problems (3.8.0-25-generic #37-Ubuntu SMP)
+ [Dell XPS L322X] Backlight control problems (3.8.0-25-generic #37-Ubuntu
+ SMP)
Antti Kaijanmäki (kaijanmaki) wrote :

this is probably a duplicate of bug #954661.

Launchpad Janitor (janitor) wrote :

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

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