I have a problem with my system, i think it's a kernel issue because light sensor stop to respond after kernel load.
For example, when i am in the GRUB menu, light sensor work correctly and i can enable and disable sensor with FN+left arrow, but when kernel starts to load, without any module loaded (i stop loading to an emergency shell, so i eliminate issues concerning modules or any other software, i.e. gnome-power-manager), light sensor stops to work.
I test my pc with a CentOS 5.5 live (kernel 2.6.18) and it's OK, also in emergency shell, if i try with CentOS 6 (kernel version over 2.6.30) the issue is present, so i think it's a kernel regression, but i'm not sure.
My collegue with a Dell Latitude XT (it's an older series) has not the issue, its ambient light sensor works fine.
with lsinput i identify the Dell Wky Hotkeys and if i check with /lib/udev/keymap -i input/event6 i read:
scan code: 0x4B key code: unknown
So is this a problem related to dell_wmi?
What can i do to identify the issue more precisely?
Ubuntu version: 11.10
---
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 1.23-0ubuntu4
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: alby 2047 F.... pulseaudio
CRDA: Error: [Errno 2] File o directory non esistente
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xf6adc000 irq 47'
Mixer name : 'Intel Cantiga HDMI'
Components : 'HDA:111d76b2,10280277,00100302 HDA:80862802,80860101,00100000'
Controls : 19
Simple ctrls : 11
DistroRelease: Ubuntu 11.10
HibernationDevice: RESUME=UUID=cb0b4561-895d-4949-8ea3-d84800d86cb7
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111011)
MachineType: Dell Inc. Latitude E4200
Package: linux (not installed)
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-13-generic root=/dev/mapper/Debian-root ro quiet splash quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.0.0-13.22-generic 3.0.6
RelatedPackageVersions:
linux-restricted-modules-3.0.0-13-generic N/A
linux-backports-modules-3.0.0-13-generic N/A
linux-firmware 1.60
StagingDrivers: mei
Tags: oneiric staging
Uname: Linux 3.0.0-13-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm admin cdrom dialout disk libvirtd lpadmin plugdev sambashare
dmi.bios.date: 08/17/2010
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A18
dmi.board.name: 0D516F
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA18:bd08/17/2010:svnDellInc.:pnLatitudeE4200:pvr:rvnDellInc.:rn0D516F:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: Latitude E4200
dmi.sys.vendor: Dell Inc.
This bug is missing log files that will aid in diagnosing the problem. From a terminal window please run:
apport-collect 887776
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.