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** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
** Tags added: kernel-request-3.13.0-24.46
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https://bugs.launchpad.net/bugs/1249219
Title:
8086:0116 [Lenovo B570] backlight control acpi_video0 instead
intel_backlight
Status in “linux” package in Ubuntu:
Incomplete
Bug description:
After upgrading to new release (13.10), when i control brightness,
system change value in file
/sys/class/backlight/acpi_video0/brightness instead of
/sys/class/backlight/intel_backlight/brightness by default. On 13.04
or older brightness works good.
---
ApportVersion: 2.12.6-0ubuntu1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: timofey 2907 F.... pulseaudio
CurrentDmesg:
Error: command ['sh', '-c', 'dmesg | comm -13 --nocheck-order /var/log/dmesg
-'] failed with exit code 1: comm: /var/log/dmesg: Permission denied
dmesg: write failed: Broken pipe
DistroRelease: Ubuntu 14.04
InstallationDate: Installed on 2013-05-28 (169 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
MachineType: LENOVO HuronRiver Platform
MarkForUpload: True
NonfreeKernelModules: wl
Package: linux (not installed)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-3.12.0-2-generic
root=UUID=5f54dc08-5f0f-4ab1-bdf2-844517b2419b ro rootflags=subvol=@
acpi_backlight=vendor
ProcVersionSignature: Ubuntu 3.12.0-2.7-generic 3.12.0
Tags: trusty
Uname: Linux 3.12.0-2-generic x86_64
UpgradeStatus: Upgraded to trusty on 2013-07-08 (127 days ago)
UserGroups: audio autopilot libvirtd sudo video
WifiSyslog:
dmi.bios.date: 10/27/2011
dmi.bios.vendor: LENOVO
dmi.bios.version: 44CN43WW
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Emerald Lake
dmi.board.vendor: LENOVO
dmi.board.version: FAB1
dmi.chassis.asset.tag: Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: 0.1
dmi.modalias:
dmi:bvnLENOVO:bvr44CN43WW:bd10/27/2011:svnLENOVO:pnHuronRiverPlatform:pvrLenovoB570:rvnLENOVO:rnEmeraldLake:rvrFAB1:cvnLENOVO:ct10:cvr0.1:
dmi.product.name: HuronRiver Platform
dmi.product.version: Lenovo B570
dmi.sys.vendor: LENOVO
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