Brightness controls do not work on Thinkpad T61

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[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.14-rc3-trusty/

The upstream did not boot. I added the tag and mark it as confirmed.

The latest daily build fixed this, I am marking the bug as invalid.

I confirm this problem on a Thinkpad T61 after upgrade to the official Trusty release. Since the upgrade, brightness controls are not wporking any longer. This problem is *not* fixed!
Reopening.

Possible duplicate: Bug 1268252

Can also confirm the bug. There seems to be a workaround:
Brightness controls do work in terminal mode (Ctrl+Alt+F1) and the change is kept when in GUI mode (Ctrl+Alt+F7).
For me, when I use the brightness controls in Gnome, I can see and move the (ThinkPad-) control slide but changes are not affecting the brightness, same with the slider in Gnome settings.

Okay so we have to use the nvidia-304 driver, the legacy one, instead of
the nvidia 331

On Tue, Apr 29, 2014 at 12:52 PM, moritz rehbach <email address hidden>wrote:

> Can also confirm the bug. There seems to be a workaround:
> Brightness controls do work in terminal mode (Ctrl+Alt+F1) and the change
> is kept when in GUI mode (Ctrl+Alt+F7).
> For me, when I use the brightness controls in Gnome, I can see and move
> the (ThinkPad-) control slide but changes are not affecting the brightness,
> same with the slider in Gnome settings.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1280927
>
> Title:
> Brightness controls do not work on Thinkpad T61
>
> Status in “linux” package in Ubuntu:
> Confirmed
>
> Bug description:
> I have the nvidia graphics drivers installed on my laptop and the
> brightess control doesn't work. I will give more info if asked.
>
> ProblemType: Bug
> DistroRelease: Ubuntu 14.04
> Package: linux-image-3.13.0-8-generic 3.13.0-8.28 [modified:
> boot/vmlinuz-3.13.0-8-generic]
> ProcVersionSignature: Ubuntu 3.13.0-8.28-generic 3.13.2
> Uname: Linux 3.13.0-8-generic x86_64
> NonfreeKernelModules: nvidia
> ApportVersion: 2.13.2-0ubuntu4
> Architecture: amd64
> AudioDevicesInUse:
> USER PID ACCESS COMMAND
> /dev/snd/controlC0: jack 3366 F.... pulseaudio
> CurrentDesktop: GNOME
> Date: Sun Feb 16 20:05:42 2014
> HibernationDevice: RESUME=UUID=dca68f85-f13a-46ac-a6f1-464953ec1f41
> InstallationDate: Installed on 2014-02-16 (0 days ago)
> InstallationMedia: Ubuntu-GNOME 14.04 "Trusty Tahr" - Alpha amd64
> (20140216)
> MachineType: LENOVO 7663Y1C
> PccardctlIdent:
> Socket 0:
> no product info available
> PccardctlStatus:
> Socket 0:
> no card
> ProcEnviron:
> TERM=xterm
> PATH=(custom, no user)
> XDG_RUNTIME_DIR=<set>
> LANG=en_US.UTF-8
> SHELL=/bin/bash
> ProcFB:
>
> ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-8-generic
> root=UUID=8c5abef2-b566-4be2-a234-648e209ce22c ro quiet splash
> RelatedPackageVersions:
> linux-restricted-modules-3.13.0-8-generic N/A
> linux-backports-modules-3.13.0-8-generic N/A
> linux-firmware 1.124
> RfKill:
> 0: phy0: Wireless LAN
> Soft blocked: no
> Hard blocked: no
> SourcePackage: linux
> UpgradeStatus: No upgrade log present (probably fresh install)
> dmi.bios.date: 03/18/2011
> dmi.bios.vendor: LENOVO
> dmi.bios.version: 7LETC9WW (2.29 )
> dmi.board.name: 7663Y1C
> dmi.board.vendor: LENOVO
> dmi.board.version: Not Available
> dmi.chassis.asset.tag: No Asset Information
> dmi.chassis.type: 10
> dmi.chassis.vendor: LENOVO
> dmi.chassis.version: Not Available
> dmi.modalias:
> dmi:bvnLENOVO:bvr7LETC9WW(2.29):bd03/18/2011:svnLENOVO:pn7663Y1C:pvrThinkPadT61:rvnLENOVO:rn7663Y1C:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
> dmi.product.name: 7663Y1C
> dmi.product.version: ThinkPad T61
> dmi.sys.vendor: LENOVO
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1280927/+s...

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This bug is still affecting me. I updated and tested and still suffer the same issue. While the brightness indicators change, no change in actual display brightness happens.

Also affects my Thinkpad T61p on:

- Kubuntu amd64 14.04
- Nvidia drivers package "nvidia-331" Version: 331.38-0ubuntu7
- Kernel 3.13.0-29-generic #53-Ubuntu SMP

I confirm that for the nvidia-331 the bug is still present, but with the legacy nvidia-304 driver I can successfully change brightness in graphical console.

Same here on R61

With 331 no brightness control, whereas with 304 all works fine ;)

And it seems Suspend even doesn't work well with 331 (restart of lightdm, logout, when waking up), but I have to keep an eye on that one ...