Cannot get laptop panel brightness after upgrade to Jaunty samsung nc10

[johny]

On my Samsung NC10 After the upgrade to Jaunty, there is no control over brightness, neither by hotkeys (worked on 9.04),
nor throught the brightness applet.

I suppose it's udev or gnome-power-manager, but I can't be completely sure.

The Kernel I'm using is 2.6.31-16-generic, but had 31.15 installed and it didn't work anyway.

Please let me know what else information do you need to track this.

Cheers

Lukasz

ProblemType: Bug
Architecture: i386
Date: Sat Dec 5 14:00:54 2009
DistroRelease: Ubuntu 9.10
MachineType: SAMSUNG ELECTRONICS CO., LTD. NC10
Package: udev 147~-6.1
ProcCmdLine: root=UUID=f3a9e497-841d-46c5-b361-6e299de8859f ro quiet splash
ProcEnviron:
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-16.52-generic
SourcePackage: udev
Uname: Linux 2.6.31-16-generic i686
dmi.bios.date: 04/14/2009
dmi.bios.vendor: Phoenix Technologies Ltd.
dmi.bios.version: 07CA.M002.20090414.KTW
dmi.board.name: NC10
dmi.board.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.board.version: Not Applicable
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: SAMSUNG ELECTRONICS CO., LTD.
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnPhoenixTechnologiesLtd.:bvr07CA.M002.20090414.KTW:bd04/14/2009:svnSAMSUNGELECTRONICSCO.,LTD.:pnNC10:pvrNotApplicable:rvnSAMSUNGELECTRONICSCO.,LTD.:rnNC10:rvrNotApplicable:cvnSAMSUNGELECTRONICSCO.,LTD.:ct10:cvrN/A:
dmi.product.name: NC10
dmi.product.version: Not Applicable
dmi.sys.vendor: SAMSUNG ELECTRONICS CO., LTD.

[Victor Vargas (kamus)]

reassigned to gnome-power-manager

[xteejx (xteejx-deactivatedaccount)]

Hi johny, and thanks for reporting this to us. Can you provide the output files from the following:
udevadm info --export-db > udev-db.txt
dmesg > dmesg.log
sudo lsinput > lsinput.log
xkbcomp -xkb :0 - > xkbcomp.txt
setxkbmap -print > xkbmap.txt
Also can you test and provide the information under the "Step-by-step Troubleshooting" section at https://wiki.ubuntu.com/Hotkeys/Troubleshooting . This will help developers find the cause of the problem. Thank you.

[Paul Dufresne (paulduf)]

Reporter of bug #503577, suggest that adding kernel boot options: apci_brightness=vendor although I believe it must be:
acpi_backlight=vendor because I don't find acpi_brightness kernel option.
As explained in http://ubuntuforums.org/showpost.php?p=8612908&postcount=828
But I guess it has to be considered a workaround, FOR A DIFFERENT HARDWARE THAN YOURS, but may be worth to try.

[xteejx (xteejx-deactivatedaccount)]

@Paul: Maybe that comment should have been made IN bug 503577.

@Johny: please ignore this, and continue to provide the information requested by myself. Thank you.

[xteejx (xteejx-deactivatedaccount)]

We are closing this bug report because it lacks the information we need to investigate the problem, as described in the previous comments. Please reopen it if you can give us the missing information, and don't hesitate to submit bug reports in the future. To reopen the bug report you can click on the current status, under the Status column, and change the Status back to "New". Thanks again!