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Message #29411
[Bug 853244] Re: Acer Aspire 5742Z brightness keys not working
Alkis Georgopoulos, the issue you are reporting is an upstream one.
Could you please report this problem through the appropriate channel by
following the instructions _verbatim_ at
https://wiki.ubuntu.com/Bugs/Upstream/kernel#KernelTeam.2BAC8-KernelTeamBugPolicies.Overview_on_Reporting_Bugs_Upstream
?
Please provide a direct URL to your post once you have made it so that
it may be tracked.
Thank you for your understanding.
** Tags added: latest-bios-v1.30 trusty
** Description changed:
In 2.6.32 (Lucid) there's an /sys/devices/virtual/backlight/acpi_video0
interface for Aspire 5742Z, and brightness hotkeys do modify the values
of the files in that dir, but the actual laptop brightness isn't
changed.
In 3.0.0-9 (Oneiric beta 1) there's no /sys/devices/virtual/backlight
interface at all.
If I boot with acpi=off, the brightness keys correctly modify
brightness, but of course I lose all other ACPI functionality.
I tried some of the other acpi-related kernel parameters (acpi_backlight=vendor etc) mentioned in
* https://wiki.ubuntu.com/Kernel/Debugging/Backlight
* https://wiki.ubuntu.com/DebuggingACPI
* www.kernel.org/doc/Documentation/kernel-parameters.txt
* http://www.lesswatts.org/projects/acpi/debug.php
to no avail, brightness only works with acpi=off or acpi=ht.
- I tried the fwts tool for ACPI testing, and it produced some errors, I'm attaching the output.
- I also tried playing with acpiexec, but calling the _BCM method didn't change the brightness either.
+ I tried the fwts tool for ACPI testing, and it produced some errors, I'm
+ attaching the output. I also tried playing with acpiexec, but calling
+ the _BCM method didn't change the brightness either.
- `ubuntu-bug linux` doesn't work from the oneiric beta live CD, I'll
- manually attach lspci etc as well.
+ WORKAROUND: echo 123 > /sys/class/backlight/intel_backlight/brightness
+
+ WORKAROUND: If I boot with `acpi_osi=Linux` in the kernel command line,
+ I can change the brightness, but the brightness window doesn't pop up.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.2.0-24-generic 3.2.0-24.37
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14
Uname: Linux 3.2.0-24-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu7
Architecture: amd64
ArecordDevices:
- **** List of CAPTURE Hardware Devices ****
- card 0: Intel [HDA Intel], device 0: ALC272X Analog [ALC272X Analog]
- Subdevices: 1/1
- Subdevice #0: subdevice #0
+ **** List of CAPTURE Hardware Devices ****
+ card 0: Intel [HDA Intel], device 0: ALC272X Analog [ALC272X Analog]
+ Subdevices: 1/1
+ Subdevice #0: subdevice #0
AudioDevicesInUse:
- USER PID ACCESS COMMAND
- /dev/snd/controlC0: alkisg 1705 F.... xfce4-volumed
- alkisg 1736 F.... pulseaudio
+ USER PID ACCESS COMMAND
+ /dev/snd/controlC0: alkisg 1705 F.... xfce4-volumed
+ alkisg 1736 F.... pulseaudio
Card0.Amixer.info:
- Card hw:0 'Intel'/'HDA Intel at 0xb4400000 irq 44'
- Mixer name : 'Intel IbexPeak HDMI'
- Components : 'HDA:10ec0272,10250487,00100001 HDA:80862804,80860101,00100000'
- Controls : 27
- Simple ctrls : 13
+ Card hw:0 'Intel'/'HDA Intel at 0xb4400000 irq 44'
+ Mixer name : 'Intel IbexPeak HDMI'
+ Components : 'HDA:10ec0272,10250487,00100001 HDA:80862804,80860101,00100000'
+ Controls : 27
+ Simple ctrls : 13
Date: Fri May 18 07:51:58 2012
HibernationDevice: RESUME=UUID=52f7a35f-fad8-4c9d-baf1-3d3087278f3c
InstallationMedia: Xubuntu 12.04 "Precise Pangolin" - Alpha amd64 (20120201.1)
Lsusb:
- Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
- Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
- Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
- Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
- Bus 001 Device 003: ID 064e:c21c Suyin Corp.
+ Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
+ Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
+ Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
+ Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
+ Bus 001 Device 003: ID 064e:c21c Suyin Corp.
MachineType: Acer Aspire 5742Z
ProcEnviron:
- LANGUAGE=el:en
- TERM=xterm
- PATH=(custom, no user)
- LANG=el_GR.UTF-8
- SHELL=/bin/bash
+ LANGUAGE=el:en
+ TERM=xterm
+ PATH=(custom, no user)
+ LANG=el_GR.UTF-8
+ SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-24-generic root=UUID=9ba52df4-ec9e-4e1c-bbd7-322f50437f94 ro quiet splash vt.handoff=7
RelatedPackageVersions:
- linux-restricted-modules-3.2.0-24-generic N/A
- linux-backports-modules-3.2.0-24-generic N/A
- linux-firmware 1.79
+ linux-restricted-modules-3.2.0-24-generic N/A
+ linux-backports-modules-3.2.0-24-generic N/A
+ linux-firmware 1.79
SourcePackage: linux
StagingDrivers: mei
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/10/2011
dmi.bios.vendor: Acer
dmi.bios.version: V1.24
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Aspire 5742Z
dmi.board.vendor: Acer
dmi.board.version: V1.24
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: V1.24
dmi.modalias: dmi:bvnAcer:bvrV1.24:bd08/10/2011:svnAcer:pnAspire5742Z:pvrV1.24:rvnAcer:rnAspire5742Z:rvrV1.24:cvnAcer:ct10:cvrV1.24:
dmi.product.name: Aspire 5742Z
dmi.product.version: V1.24
dmi.sys.vendor: Acer
** Tags added: lucid
** Summary changed:
- Acer Aspire 5742Z brightness keys not working
+ 8086:0046 Acer Aspire 5742Z brightness keys not working
** Changed in: linux (Ubuntu)
Importance: Medium => Low
--
You received this bug notification because you are a member of Kernel
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https://bugs.launchpad.net/bugs/853244
Title:
8086:0046 Acer Aspire 5742Z brightness keys not working
Status in The Linux Kernel:
New
Status in “linux” package in Ubuntu:
Triaged
Bug description:
In 2.6.32 (Lucid) there's an
/sys/devices/virtual/backlight/acpi_video0 interface for Aspire 5742Z,
and brightness hotkeys do modify the values of the files in that dir,
but the actual laptop brightness isn't changed.
In 3.0.0-9 (Oneiric beta 1) there's no /sys/devices/virtual/backlight
interface at all.
If I boot with acpi=off, the brightness keys correctly modify
brightness, but of course I lose all other ACPI functionality.
I tried some of the other acpi-related kernel parameters (acpi_backlight=vendor etc) mentioned in
* https://wiki.ubuntu.com/Kernel/Debugging/Backlight
* https://wiki.ubuntu.com/DebuggingACPI
* www.kernel.org/doc/Documentation/kernel-parameters.txt
* http://www.lesswatts.org/projects/acpi/debug.php
to no avail, brightness only works with acpi=off or acpi=ht.
I tried the fwts tool for ACPI testing, and it produced some errors,
I'm attaching the output. I also tried playing with acpiexec, but
calling the _BCM method didn't change the brightness either.
WORKAROUND: echo 123 > /sys/class/backlight/intel_backlight/brightness
WORKAROUND: If I boot with `acpi_osi=Linux` in the kernel command
line, I can change the brightness, but the brightness window doesn't
pop up.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.2.0-24-generic 3.2.0-24.37
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14
Uname: Linux 3.2.0-24-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu7
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC272X Analog [ALC272X Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: alkisg 1705 F.... xfce4-volumed
alkisg 1736 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xb4400000 irq 44'
Mixer name : 'Intel IbexPeak HDMI'
Components : 'HDA:10ec0272,10250487,00100001 HDA:80862804,80860101,00100000'
Controls : 27
Simple ctrls : 13
Date: Fri May 18 07:51:58 2012
HibernationDevice: RESUME=UUID=52f7a35f-fad8-4c9d-baf1-3d3087278f3c
InstallationMedia: Xubuntu 12.04 "Precise Pangolin" - Alpha amd64 (20120201.1)
Lsusb:
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 003: ID 064e:c21c Suyin Corp.
MachineType: Acer Aspire 5742Z
ProcEnviron:
LANGUAGE=el:en
TERM=xterm
PATH=(custom, no user)
LANG=el_GR.UTF-8
SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-24-generic root=UUID=9ba52df4-ec9e-4e1c-bbd7-322f50437f94 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.2.0-24-generic N/A
linux-backports-modules-3.2.0-24-generic N/A
linux-firmware 1.79
SourcePackage: linux
StagingDrivers: mei
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/10/2011
dmi.bios.vendor: Acer
dmi.bios.version: V1.24
dmi.board.asset.tag: Base Board Asset Tag
dmi.board.name: Aspire 5742Z
dmi.board.vendor: Acer
dmi.board.version: V1.24
dmi.chassis.type: 10
dmi.chassis.vendor: Acer
dmi.chassis.version: V1.24
dmi.modalias: dmi:bvnAcer:bvrV1.24:bd08/10/2011:svnAcer:pnAspire5742Z:pvrV1.24:rvnAcer:rnAspire5742Z:rvrV1.24:cvnAcer:ct10:cvrV1.24:
dmi.product.name: Aspire 5742Z
dmi.product.version: V1.24
dmi.sys.vendor: Acer
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