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Message #66985
[Bug 1330640] Re: Ubuntu 14.04 on Acer TravelMate P253: LCD screen brightness always at maximum level
Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v3.15 kernel[0].
If this bug is fixed in the mainline kernel, please add the following
tag 'kernel-fixed-upstream'.
If the mainline kernel does not fix this bug, please add the tag:
'kernel-bug-exists-upstream'.
If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".
Thanks in advance.
[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.15-utopic/
** Changed in: linux (Ubuntu)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/1330640
Title:
Ubuntu 14.04 on Acer TravelMate P253: LCD screen brightness always at
maximum level
Status in “linux” package in Ubuntu:
Incomplete
Bug description:
Hi,
on my new Acer TravelMate P253 notebook, with ubuntu 14.04 desktop I can't modify LCD screen brghtness: by pressing the normal key combination for this function (Fn+Left / Fn+Right) the screen brightness applet correctly shows up on the screen, and its level correctly goes up and down when pressing the function keys, but nothing actually happens, and the screen alway stays at its maximum brightness.
Thank you, your suggestions are always welcome.
Adalberto
---
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: adaca 2036 F.... pulseaudio
CurrentDesktop: Unity
DistroRelease: Ubuntu 14.04
HibernationDevice: RESUME=UUID=2cb12901-c875-489b-9b65-2faa464d351b
InstallationDate: Installed on 2014-06-15 (1 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
MachineType: Acer TravelMate P253
Package: linux (not installed)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-29-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.13.0-29.53-generic 3.13.11.2
RelatedPackageVersions:
linux-restricted-modules-3.13.0-29-generic N/A
linux-backports-modules-3.13.0-29-generic N/A
linux-firmware 1.127.2
Tags: trusty
Uname: Linux 3.13.0-29-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 12/16/2013
dmi.bios.vendor: Insyde Corp.
dmi.bios.version: V2.21
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: BA51_HC_CR
dmi.board.vendor: Acer
dmi.board.version: Type2 - Board Version
dmi.chassis.type: 10
dmi.chassis.vendor: Insyde Corp.
dmi.chassis.version: V2.21
dmi.modalias: dmi:bvnInsydeCorp.:bvrV2.21:bd12/16/2013:svnAcer:pnTravelMateP253:pvrV2.21:rvnAcer:rnBA51_HC_CR:rvrType2-BoardVersion:cvnInsydeCorp.:ct10:cvrV2.21:
dmi.product.name: TravelMate P253
dmi.product.version: V2.21
dmi.sys.vendor: Acer
---
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: adaca 2036 F.... pulseaudio
CurrentDesktop: Unity
DistroRelease: Ubuntu 14.04
HibernationDevice: RESUME=UUID=2cb12901-c875-489b-9b65-2faa464d351b
InstallationDate: Installed on 2014-06-15 (1 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417)
MachineType: Acer TravelMate P253
Package: linux (not installed)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-3.13.0-29-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro quiet splash vt.handoff=7
ProcVersionSignature: Ubuntu 3.13.0-29.53-generic 3.13.11.2
RelatedPackageVersions:
linux-restricted-modules-3.13.0-29-generic N/A
linux-backports-modules-3.13.0-29-generic N/A
linux-firmware 1.127.2
Tags: trusty
Uname: Linux 3.13.0-29-generic x86_64
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
_MarkForUpload: True
dmi.bios.date: 12/16/2013
dmi.bios.vendor: Insyde Corp.
dmi.bios.version: V2.21
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: BA51_HC_CR
dmi.board.vendor: Acer
dmi.board.version: Type2 - Board Version
dmi.chassis.type: 10
dmi.chassis.vendor: Insyde Corp.
dmi.chassis.version: V2.21
dmi.modalias: dmi:bvnInsydeCorp.:bvrV2.21:bd12/16/2013:svnAcer:pnTravelMateP253:pvrV2.21:rvnAcer:rnBA51_HC_CR:rvrType2-BoardVersion:cvnInsydeCorp.:ct10:cvrV2.21:
dmi.product.name: TravelMate P253
dmi.product.version: V2.21
dmi.sys.vendor: Acer
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