There is a kernel.org bugreport also https://bugzilla.kernel.org/show_bug.cgi?id=16036
currently I am using sudo setpci -s 00:02.0 F4.B=80 to change backlight control. Well, actually I use lirc daemon to intercept fn-keys and call a following bash script when screen brightness fn-keys are pressed) #!/bin/bash var1=`cat /sys/class/backlight/acpi_video0/max_brightness` var2=`cat /sys/class/backlight/acpi_video0/actual_brightness` var3=`echo "16 o 16 i $var2 FF $var1 / * + 1 + p"| /usr/bin/dc ` sudo setpci -s 00:02.0 F4.B=$var3 yep, it works :) 2010/9/22, Luiz Fernando <631...@bugs.launchpad.net>: > This is not on kubuntu only - I have exactly the same problem on Ubuntu. > My laptop is not the same as the reporter's (it's a Samsung R430), but > it has the same graphics chipset, has the same backlight setting > problem, I've used the same workaround on Lucid, and now it also doesn't > work on Maverick. I my case, taking off only "nomodeset" from the kernel > options allows the system to boot into X, and though the brightness does > change accordingly when the system is running on AC or battery (whereas > without "acpi_backlight=vendor" not even that happens), the brightness > can no longer me set on the Power Management on Gnome Preferences (the > slider is missing). > > -- > [maverick] - Xorg fails to load with "nomodeset" kernel parameter > https://bugs.launchpad.net/bugs/631412 > You received this bug notification because you are a direct subscriber > of the bug. > > Status in "xserver-xorg-video-intel" package in Ubuntu: New > > Bug description: > Binary package hint: xserver-xorg-video-intel > > Some notebooks need the "nomodeset acpi_backlight = vendor" kernel boot time > option to make screen brigthness adjustable by Fn keys (I have a Toshiba > Satelltie T130). With this option xorg failes to load. Without this screen > is always at a maximal brightness. This workaround was OK in lucid, now in > maverick it doesn't work. > > ProblemType: Bug > DistroRelease: Ubuntu 10.10 > Package: linux-image-2.6.35-19-generic 2.6.35-19.28 > Regression: Yes > Reproducible: Yes > ProcVersionSignature: Ubuntu 2.6.35-19.28-generic 2.6.35.3 > Uname: Linux 2.6.35-19-generic x86_64 > AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23. > Architecture: amd64 > ArecordDevices: > **** List of CAPTURE Hardware Devices **** > card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog] > Subdevices: 1/1 > Subdevice #0: subdevice #0 > AudioDevicesInUse: > USER PID ACCESS COMMAND > /dev/snd/controlC0: shawkat 1664 F.... pulseaudio > /dev/snd/pcmC0D0p: shawkat 1664 F...m pulseaudio > CRDA: Error: [Errno 2] Нет такого файла или каталога > Card0.Amixer.info: > Card hw:0 'Intel'/'HDA Intel at 0xf0700000 irq 45' > Mixer name : 'Intel Cantiga HDMI' > Components : 'HDA:14f15066,1179ffe0,00100301 > HDA:80862802,80860101,00100000' > Controls : 13 > Simple ctrls : 8 > Date: Mon Sep 6 13:34:04 2010 > InstallationMedia: Kubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100427) > MachineType: TOSHIBA SATELLITE T130 > ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-19-generic > root=UUID=21b3e6c1-e81f-40a6-afae-cd0946341b37 ro quiet splash > ProcEnviron: > LANGUAGE= > PATH=(custom, user) > LANG=ru_RU.UTF-8 > SHELL=/bin/bash > RelatedPackageVersions: linux-firmware 1.38 > RfKill: > 0: hci0: Bluetooth > Soft blocked: no > Hard blocked: no > SourcePackage: linux > UserAsoundrc: > pcm.bluetooth { > type bluetooth > device 00:1E:7C:00:4D:93 > } > dmi.bios.date: 09/29/2009 > dmi.bios.vendor: TOSHIBA > dmi.bios.version: V1.70 > dmi.board.name: SATELLITE T130 > dmi.board.vendor: TOSHIBA > dmi.board.version: Not Applicable > dmi.chassis.asset.tag: No Asset Tag > dmi.chassis.type: 10 > dmi.chassis.vendor: TOSHIBA > dmi.chassis.version: N/A > dmi.modalias: > dmi:bvnTOSHIBA:bvrV1.70:bd09/29/2009:svnTOSHIBA:pnSATELLITET130:pvrPST3AE-01S01UGR:rvnTOSHIBA:rnSATELLITET130:rvrNotApplicable:cvnTOSHIBA:ct10:cvrN/A: > dmi.product.name: SATELLITE T130 > dmi.product.version: PST3AE-01S01UGR > dmi.sys.vendor: TOSHIBA > > To unsubscribe from this bug, go to: > https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/631412/+subscribe > -- [maverick] - Xorg fails to load with "nomodeset" kernel parameter https://bugs.launchpad.net/bugs/631412 You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in ubuntu. _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
