fwiw, it still happens with: $ uname -a Linux nsn7 3.19.0-30-generic #33~14.04.1-Ubuntu SMP Tue Sep 22 09:27:00 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
And the BIOS is newer also: # dmidecode -s bios-version 83ET76WW (1.46 ) T420 -- 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/922037 Title: 10de:1057 "reduce brightness" key freezes system Status in linux package in Ubuntu: Incomplete Bug description: When I have the Nvidia discrete graphics selected in the bios, pressing the "reduce brightness" key (blue fn + end), the system freezes. It doesn't matter if I'm in X or in text mode, it happens all the time. I did it while watching the logs (/var/log/syslog, ~/.xsession-errors) and even the debug console when in text mode (F8 iirc), but nothing was written there. The machine was also unreachable from the network after the fact. ProblemType: Bug DistroRelease: Ubuntu 11.10 Package: linux-image (not installed) ProcVersionSignature: Ubuntu 3.0.0-15.26-generic 3.0.13 Uname: Linux 3.0.0-15-generic x86_64 NonfreeKernelModules: nvidia AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. ApportVersion: 1.23-0ubuntu4 Architecture: amd64 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: PCH [HDA Intel PCH], device 0: CONEXANT Analog [CONEXANT Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: andreas 2535 F.... pulseaudio /dev/snd/controlC0: andreas 2535 F.... pulseaudio CRDA: Error: [Errno 2] No such file or directory Card0.Amixer.info: Card hw:0 'PCH'/'HDA Intel PCH at 0xf5320000 irq 46' Mixer name : 'Conexant CX20590' Components : 'HDA:14f1506e,17aa21ce,00100002' Controls : 9 Simple ctrls : 6 Card1.Amixer.info: Card hw:1 'NVidia'/'HDA NVidia at 0xf3000000 irq 17' Mixer name : 'Nvidia GPU 1c HDMI/DP' Components : 'HDA:10de001c,17aa21ce,00100100' Controls : 4 Simple ctrls : 1 Card1.Amixer.values: Simple mixer control 'IEC958',0 Capabilities: pswitch pswitch-joined penum Playback channels: Mono Mono: Playback [on] Card29.Amixer.info: Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw unknown' Mixer name : 'ThinkPad EC (unknown)' Components : '' Controls : 1 Simple ctrls : 1 Card29.Amixer.values: Simple mixer control 'Console',0 Capabilities: pswitch pswitch-joined penum Playback channels: Mono Mono: Playback [on] Date: Thu Jan 26 09:44:29 2012 HibernationDevice: RESUME=UUID=0e0159cb-88a6-4653-9902-6c3934f00ef7 InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111011) MachineType: LENOVO 4177CTO ProcEnviron: LANGUAGE=en_US:en PATH=(custom, user) LANG=en_US.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.0.0-15-generic root=/dev/mapper/vg0-root ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.0.0-15-generic N/A linux-backports-modules-3.0.0-15-generic N/A linux-firmware 1.60 SourcePackage: linux StagingDrivers: mei UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 07/29/2011 dmi.bios.vendor: LENOVO dmi.bios.version: 83ET63WW (1.33 ) dmi.board.asset.tag: Not Available dmi.board.name: 4177CTO 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:bvr83ET63WW(1.33):bd07/29/2011:svnLENOVO:pn4177CTO:pvrThinkPadT420:rvnLENOVO:rn4177CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 4177CTO dmi.product.version: ThinkPad T420 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/922037/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
