| 2013-01-10 15:15:14 |
Stéphane Graber |
bug |
|
|
added bug |
| 2013-01-10 15:30:09 |
Brad Figg |
linux (Ubuntu): status |
New |
Incomplete |
|
| 2013-01-10 15:30:11 |
Brad Figg |
tags |
|
quantal |
|
| 2013-01-10 15:31:48 |
Stéphane Graber |
bug watch added |
|
http://bugzilla.kernel.org/show_bug.cgi?id=51231 |
|
| 2013-01-10 15:31:48 |
Stéphane Graber |
bug task added |
|
linux |
|
| 2013-01-10 15:32:18 |
Stéphane Graber |
tags |
quantal |
apport-collected quantal raring |
|
| 2013-01-10 15:32:20 |
Stéphane Graber |
description |
Something changed between the 3.5 and the 3.7 kernel, leading to broken brightness control on my Thinkpad x230.
Here are some test results:
== 3.5.0-21-generic ==
=== Post-boot values ===
/sys/class/backlight:
- intel-backlight
+ actual_brightness => 4438
+ bl_power => 0
+ brightness => 4438
+ max_brightness => 4438
- acpi_video0
+ actual_brightness => 15
+ bl_power => 0
+ brightness => 15
+ max_brightness => 15
=== Tests ===
echo 0 > acpi_video0/brightness => works
echo 0 > intel_backlight/brightness => works
== 3.8.0-0-generic ==
=== Post-boot values ===
/sys/class/backlight:
- intel-backlight
+ actual_brightness => 4438
+ bl_power => 0
+ brightness => 4438
+ max_brightness => 4438
- acpi_video0
+ actual_brightness => 100
+ bl_power => 0
+ brightness => 100
+ max_brightness => 100
=== Tests ===
echo 0 > acpi_video0/brightness => doesn't do anything
echo 0 > intel_backlight/brightness => works |
Something changed between the 3.5 and the 3.7 kernel, leading to broken brightness control on my Thinkpad x230.
Here are some test results:
== 3.5.0-21-generic ==
=== Post-boot values ===
/sys/class/backlight:
- intel-backlight
+ actual_brightness => 4438
+ bl_power => 0
+ brightness => 4438
+ max_brightness => 4438
- acpi_video0
+ actual_brightness => 15
+ bl_power => 0
+ brightness => 15
+ max_brightness => 15
=== Tests ===
echo 0 > acpi_video0/brightness => works
echo 0 > intel_backlight/brightness => works
== 3.8.0-0-generic ==
=== Post-boot values ===
/sys/class/backlight:
- intel-backlight
+ actual_brightness => 4438
+ bl_power => 0
+ brightness => 4438
+ max_brightness => 4438
- acpi_video0
+ actual_brightness => 100
+ bl_power => 0
+ brightness => 100
+ max_brightness => 100
=== Tests ===
echo 0 > acpi_video0/brightness => doesn't do anything
echo 0 > intel_backlight/brightness => works
---
ApportVersion: 2.8-0ubuntu1
Architecture: amd64
CheckboxSubmission: 12108b8b8b67d760cdd84f1b9574e7f3
CheckboxSystem: bb422ca46d02494cdbc459927a98bc2f
DistroRelease: Ubuntu 13.04
InstallationDate: Installed on 2012-09-02 (129 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120902)
MarkForUpload: True
Package: linux (not installed)
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 3.8.0-0.1-generic 3.8.0-rc3
Tags: raring
Uname: Linux 3.8.0-0-generic x86_64
UnreportableReason: The running kernel is not an Ubuntu kernel
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: |
|
| 2013-01-10 15:36:29 |
Stéphane Graber |
attachment added |
|
acpi https://bugs.launchpad.net/bugs/1098216/+attachment/3479188/+files/acpi |
|
| 2013-01-10 15:36:33 |
Stéphane Graber |
attachment added |
|
acpidump.txt https://bugs.launchpad.net/bugs/1098216/+attachment/3479189/+files/acpidump.txt |
|
| 2013-01-10 15:36:36 |
Stéphane Graber |
attachment added |
|
backlight https://bugs.launchpad.net/bugs/1098216/+attachment/3479190/+files/backlight |
|
| 2013-01-10 15:36:40 |
Stéphane Graber |
attachment added |
|
dmidecode.log https://bugs.launchpad.net/bugs/1098216/+attachment/3479191/+files/dmidecode.log |
|
| 2013-01-10 15:36:44 |
Stéphane Graber |
attachment added |
|
DSDT.dat https://bugs.launchpad.net/bugs/1098216/+attachment/3479192/+files/DSDT.dat |
|
| 2013-01-10 15:36:49 |
Stéphane Graber |
attachment added |
|
DSDT.dsl https://bugs.launchpad.net/bugs/1098216/+attachment/3479193/+files/DSDT.dsl |
|
| 2013-01-10 15:36:51 |
Stéphane Graber |
attachment added |
|
fwts https://bugs.launchpad.net/bugs/1098216/+attachment/3479194/+files/fwts |
|
| 2013-01-10 15:36:54 |
Stéphane Graber |
attachment added |
|
fwts_method https://bugs.launchpad.net/bugs/1098216/+attachment/3479195/+files/fwts_method |
|
| 2013-01-10 15:36:58 |
Stéphane Graber |
attachment added |
|
results.log https://bugs.launchpad.net/bugs/1098216/+attachment/3479196/+files/results.log |
|
| 2013-01-10 15:37:02 |
Stéphane Graber |
attachment added |
|
SSDT1.dat https://bugs.launchpad.net/bugs/1098216/+attachment/3479197/+files/SSDT1.dat |
|
| 2013-01-10 15:37:05 |
Stéphane Graber |
attachment added |
|
SSDT2.dat https://bugs.launchpad.net/bugs/1098216/+attachment/3479198/+files/SSDT2.dat |
|
| 2013-01-10 15:37:09 |
Stéphane Graber |
attachment added |
|
SSDT3.dat https://bugs.launchpad.net/bugs/1098216/+attachment/3479199/+files/SSDT3.dat |
|
| 2013-01-10 15:37:12 |
Stéphane Graber |
attachment added |
|
SSDT4.dat https://bugs.launchpad.net/bugs/1098216/+attachment/3479200/+files/SSDT4.dat |
|
| 2013-01-10 15:37:15 |
Stéphane Graber |
attachment added |
|
SSDT5.dat https://bugs.launchpad.net/bugs/1098216/+attachment/3479201/+files/SSDT5.dat |
|
| 2013-01-10 15:37:18 |
Stéphane Graber |
attachment added |
|
version https://bugs.launchpad.net/bugs/1098216/+attachment/3479202/+files/version |
|
| 2013-01-10 15:37:22 |
Stéphane Graber |
attachment added |
|
video https://bugs.launchpad.net/bugs/1098216/+attachment/3479203/+files/video |
|
| 2013-01-10 15:49:19 |
Joseph Salisbury |
linux (Ubuntu): importance |
Undecided |
Medium |
|
| 2013-01-10 15:52:05 |
Joseph Salisbury |
tags |
apport-collected quantal raring |
apport-collected performing-bisect quantal raring |
|
| 2013-01-10 16:42:23 |
Stéphane Graber |
linux (Ubuntu): status |
Incomplete |
Triaged |
|
| 2013-01-10 17:21:07 |
Seth Forshee |
bug |
|
|
added subscriber Seth Forshee |
| 2013-01-10 20:31:15 |
Bug Watch Updater |
linux: status |
Unknown |
Incomplete |
|
| 2013-01-10 20:31:15 |
Bug Watch Updater |
linux: importance |
Unknown |
Medium |
|
| 2013-01-14 17:31:19 |
Seth Forshee |
linux (Ubuntu): assignee |
|
Seth Forshee (sforshee) |
|
| 2013-01-14 17:31:30 |
Seth Forshee |
linux (Ubuntu): status |
Triaged |
Incomplete |
|
| 2013-01-14 19:30:31 |
Joseph Salisbury |
tags |
apport-collected performing-bisect quantal raring |
apport-collected quantal raring |
|
| 2013-01-14 20:37:26 |
Stéphane Graber |
linux (Ubuntu): status |
Incomplete |
Triaged |
|
| 2013-01-23 20:59:37 |
Chris Van Hoof |
bug |
|
|
added subscriber Chris Van Hoof |
| 2013-04-03 07:59:59 |
Daniel van Vugt |
summary |
Regression in brightness control on Lenovo Thinkpad x230 |
Regression in brightness control on Lenovo Thinkpad X230 and X1 Carbon |
|
| 2013-04-03 08:01:31 |
Daniel van Vugt |
bug watch added |
|
https://bugzilla.redhat.com/show_bug.cgi?id=909737 |
|
| 2013-04-03 08:13:06 |
Daniel van Vugt |
bug |
|
|
added subscriber Daniel van Vugt |
| 2013-04-04 14:59:19 |
Nathaniel Roach |
attachment added |
|
Patch for THINKPAD EDGE E330 https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1098216/+attachment/3620987/+files/linux3.7.xup_thinkpad_brightness.patch |
|
| 2013-04-04 15:00:34 |
Nathaniel Roach |
attachment added |
|
As requested by Seth, an ACPI dump of my E330 https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1098216/+attachment/3620988/+files/e330-acpi-tables.txt |
|
| 2013-04-04 15:04:03 |
Nathaniel Roach |
bug |
|
|
added subscriber Nathaniel Roach |
| 2013-04-04 16:18:53 |
Ubuntu Foundations Team Bug Bot |
tags |
apport-collected quantal raring |
apport-collected patch quantal raring |
|
| 2013-04-04 16:18:54 |
Ubuntu Foundations Team Bug Bot |
bug |
|
|
added subscriber Joseph Salisbury |
| 2013-04-04 16:23:17 |
ZiNk |
bug |
|
|
added subscriber ZiNk |
| 2013-04-05 13:30:02 |
Nathaniel Roach |
attachment added |
|
e330_dmesg_noblpatch.txt https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1098216/+attachment/3623337/+files/e330_dmesg_noblpatch.txt |
|
| 2013-04-06 15:32:01 |
cociuba |
bug |
|
|
added subscriber cociuba |
| 2013-04-07 11:47:21 |
Vitali Kulikou |
bug |
|
|
added subscriber Vitali Kulikou |
| 2013-04-09 08:07:03 |
Jacek Nykis |
bug |
|
|
added subscriber The Canonical Sysadmins |
| 2013-04-15 20:15:53 |
Jens Füllenbach |
bug |
|
|
added subscriber Jens Füllenbach |
| 2013-04-19 12:59:38 |
Seth Forshee |
description |
Something changed between the 3.5 and the 3.7 kernel, leading to broken brightness control on my Thinkpad x230.
Here are some test results:
== 3.5.0-21-generic ==
=== Post-boot values ===
/sys/class/backlight:
- intel-backlight
+ actual_brightness => 4438
+ bl_power => 0
+ brightness => 4438
+ max_brightness => 4438
- acpi_video0
+ actual_brightness => 15
+ bl_power => 0
+ brightness => 15
+ max_brightness => 15
=== Tests ===
echo 0 > acpi_video0/brightness => works
echo 0 > intel_backlight/brightness => works
== 3.8.0-0-generic ==
=== Post-boot values ===
/sys/class/backlight:
- intel-backlight
+ actual_brightness => 4438
+ bl_power => 0
+ brightness => 4438
+ max_brightness => 4438
- acpi_video0
+ actual_brightness => 100
+ bl_power => 0
+ brightness => 100
+ max_brightness => 100
=== Tests ===
echo 0 > acpi_video0/brightness => doesn't do anything
echo 0 > intel_backlight/brightness => works
---
ApportVersion: 2.8-0ubuntu1
Architecture: amd64
CheckboxSubmission: 12108b8b8b67d760cdd84f1b9574e7f3
CheckboxSystem: bb422ca46d02494cdbc459927a98bc2f
DistroRelease: Ubuntu 13.04
InstallationDate: Installed on 2012-09-02 (129 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120902)
MarkForUpload: True
Package: linux (not installed)
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 3.8.0-0.1-generic 3.8.0-rc3
Tags: raring
Uname: Linux 3.8.0-0-generic x86_64
UnreportableReason: The running kernel is not an Ubuntu kernel
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: |
== Raring SRU Justification ==
Impact: A number of ThinkPad models have a workaround in the ACPI
backlight implementation for Windows 8 that more or less completely
breaks backlight control.
Fix: Add an OSI quirk to no longer claim to be Windows 8 on these
machines, causing the firmware to revert to the older, working behavior.
Test Case: Verified on LP #1098216 and bugzill.kernel.org #51231.
---
Something changed between the 3.5 and the 3.7 kernel, leading to broken brightness control on my Thinkpad x230.
Here are some test results:
== 3.5.0-21-generic ==
=== Post-boot values ===
/sys/class/backlight:
- intel-backlight
+ actual_brightness => 4438
+ bl_power => 0
+ brightness => 4438
+ max_brightness => 4438
- acpi_video0
+ actual_brightness => 15
+ bl_power => 0
+ brightness => 15
+ max_brightness => 15
=== Tests ===
echo 0 > acpi_video0/brightness => works
echo 0 > intel_backlight/brightness => works
== 3.8.0-0-generic ==
=== Post-boot values ===
/sys/class/backlight:
- intel-backlight
+ actual_brightness => 4438
+ bl_power => 0
+ brightness => 4438
+ max_brightness => 4438
- acpi_video0
+ actual_brightness => 100
+ bl_power => 0
+ brightness => 100
+ max_brightness => 100
=== Tests ===
echo 0 > acpi_video0/brightness => doesn't do anything
echo 0 > intel_backlight/brightness => works
---
ApportVersion: 2.8-0ubuntu1
Architecture: amd64
CheckboxSubmission: 12108b8b8b67d760cdd84f1b9574e7f3
CheckboxSystem: bb422ca46d02494cdbc459927a98bc2f
DistroRelease: Ubuntu 13.04
InstallationDate: Installed on 2012-09-02 (129 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120902)
MarkForUpload: True
Package: linux (not installed)
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 3.8.0-0.1-generic 3.8.0-rc3
Tags: raring
Uname: Linux 3.8.0-0-generic x86_64
UnreportableReason: The running kernel is not an Ubuntu kernel
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: |
|
| 2013-04-22 16:17:21 |
Joschi Poschi |
bug |
|
|
added subscriber Johannes Gowin |
| 2013-04-24 10:46:48 |
James Page |
bug |
|
|
added subscriber James Page |
| 2013-04-26 11:11:34 |
Jan Van Hoecke |
bug |
|
|
added subscriber Jan Van Hoecke |
| 2013-04-26 20:32:45 |
Matthew Tucker-Simmons |
bug |
|
|
added subscriber Matthew Tucker-Simmons |
| 2013-04-27 01:09:18 |
Mihai Rasinariu |
bug |
|
|
added subscriber Mihai Rasinariu |
| 2013-04-28 07:11:39 |
kaeru |
bug |
|
|
added subscriber kaeru |
| 2013-04-28 09:02:50 |
jnns |
bug |
|
|
added subscriber jnns |
| 2013-04-30 14:34:45 |
Marius B. Kotsbak |
bug |
|
|
added subscriber Marius B. Kotsbak |
| 2013-04-30 14:51:45 |
Marius B. Kotsbak |
bug watch added |
|
https://bugzilla.redhat.com/show_bug.cgi?id=903136 |
|
| 2013-04-30 14:51:45 |
Marius B. Kotsbak |
bug task added |
|
linux (Fedora) |
|
| 2013-04-30 16:15:45 |
Robin Winslow |
bug |
|
|
added subscriber nottRobin |
| 2013-04-30 16:17:36 |
Ubuntu Foundations Team Bug Bot |
bug |
|
|
added subscriber Ubuntu Review Team |
| 2013-05-03 19:24:54 |
Stefan H. |
bug |
|
|
added subscriber Stefan H. |
| 2013-05-05 17:21:04 |
Igor Gnatenko |
bug |
|
|
added subscriber Brain |
| 2013-05-06 03:14:08 |
Igor Gnatenko |
attachment added |
|
dmidecode https://bugs.launchpad.net/linux/+bug/1098216/+attachment/3666336/+files/dmidecode |
|
| 2013-05-06 07:35:52 |
Marius B. Kotsbak |
description |
== Raring SRU Justification ==
Impact: A number of ThinkPad models have a workaround in the ACPI
backlight implementation for Windows 8 that more or less completely
breaks backlight control.
Fix: Add an OSI quirk to no longer claim to be Windows 8 on these
machines, causing the firmware to revert to the older, working behavior.
Test Case: Verified on LP #1098216 and bugzill.kernel.org #51231.
---
Something changed between the 3.5 and the 3.7 kernel, leading to broken brightness control on my Thinkpad x230.
Here are some test results:
== 3.5.0-21-generic ==
=== Post-boot values ===
/sys/class/backlight:
- intel-backlight
+ actual_brightness => 4438
+ bl_power => 0
+ brightness => 4438
+ max_brightness => 4438
- acpi_video0
+ actual_brightness => 15
+ bl_power => 0
+ brightness => 15
+ max_brightness => 15
=== Tests ===
echo 0 > acpi_video0/brightness => works
echo 0 > intel_backlight/brightness => works
== 3.8.0-0-generic ==
=== Post-boot values ===
/sys/class/backlight:
- intel-backlight
+ actual_brightness => 4438
+ bl_power => 0
+ brightness => 4438
+ max_brightness => 4438
- acpi_video0
+ actual_brightness => 100
+ bl_power => 0
+ brightness => 100
+ max_brightness => 100
=== Tests ===
echo 0 > acpi_video0/brightness => doesn't do anything
echo 0 > intel_backlight/brightness => works
---
ApportVersion: 2.8-0ubuntu1
Architecture: amd64
CheckboxSubmission: 12108b8b8b67d760cdd84f1b9574e7f3
CheckboxSystem: bb422ca46d02494cdbc459927a98bc2f
DistroRelease: Ubuntu 13.04
InstallationDate: Installed on 2012-09-02 (129 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120902)
MarkForUpload: True
Package: linux (not installed)
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 3.8.0-0.1-generic 3.8.0-rc3
Tags: raring
Uname: Linux 3.8.0-0-generic x86_64
UnreportableReason: The running kernel is not an Ubuntu kernel
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups: |
== Raring SRU Justification ==
Impact: A number of ThinkPad models have a workaround in the ACPI
backlight implementation for Windows 8 that more or less completely
breaks backlight control.
Fix: Add an OSI quirk to no longer claim to be Windows 8 on these
machines, causing the firmware to revert to the older, working behavior.
Test Case: Verified on LP #1098216 and bugzill.kernel.org #51231.
---
Something changed between the 3.5 and the 3.7 kernel, leading to broken brightness control on my Thinkpad x230.
Here are some test results:
== 3.5.0-21-generic ==
=== Post-boot values ===
/sys/class/backlight:
- intel-backlight
+ actual_brightness => 4438
+ bl_power => 0
+ brightness => 4438
+ max_brightness => 4438
- acpi_video0
+ actual_brightness => 15
+ bl_power => 0
+ brightness => 15
+ max_brightness => 15
=== Tests ===
echo 0 > acpi_video0/brightness => works
echo 0 > intel_backlight/brightness => works
== 3.8.0-0-generic ==
=== Post-boot values ===
/sys/class/backlight:
- intel-backlight
+ actual_brightness => 4438
+ bl_power => 0
+ brightness => 4438
+ max_brightness => 4438
- acpi_video0
+ actual_brightness => 100
+ bl_power => 0
+ brightness => 100
+ max_brightness => 100
=== Tests ===
echo 0 > acpi_video0/brightness => doesn't do anything
echo 0 > intel_backlight/brightness => works
---
ApportVersion: 2.8-0ubuntu1
Architecture: amd64
CheckboxSubmission: 12108b8b8b67d760cdd84f1b9574e7f3
CheckboxSystem: bb422ca46d02494cdbc459927a98bc2f
DistroRelease: Ubuntu 13.04
InstallationDate: Installed on 2012-09-02 (129 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120902)
MarkForUpload: True
Package: linux (not installed)
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 3.8.0-0.1-generic 3.8.0-rc3
Tags: raring
Uname: Linux 3.8.0-0-generic x86_64
UnreportableReason: The running kernel is not an Ubuntu kernel
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:
WORKAROUND:
Add to /etc/default/grub
in the variable "GRUB_CMDLINE_LINUX_DEFAULT":
acpi_osi=\"!Windows 2012\"
e.g:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=\"!Windows 2012\"" |
|
| 2013-05-06 07:36:17 |
Marius B. Kotsbak |
description |
== Raring SRU Justification ==
Impact: A number of ThinkPad models have a workaround in the ACPI
backlight implementation for Windows 8 that more or less completely
breaks backlight control.
Fix: Add an OSI quirk to no longer claim to be Windows 8 on these
machines, causing the firmware to revert to the older, working behavior.
Test Case: Verified on LP #1098216 and bugzill.kernel.org #51231.
---
Something changed between the 3.5 and the 3.7 kernel, leading to broken brightness control on my Thinkpad x230.
Here are some test results:
== 3.5.0-21-generic ==
=== Post-boot values ===
/sys/class/backlight:
- intel-backlight
+ actual_brightness => 4438
+ bl_power => 0
+ brightness => 4438
+ max_brightness => 4438
- acpi_video0
+ actual_brightness => 15
+ bl_power => 0
+ brightness => 15
+ max_brightness => 15
=== Tests ===
echo 0 > acpi_video0/brightness => works
echo 0 > intel_backlight/brightness => works
== 3.8.0-0-generic ==
=== Post-boot values ===
/sys/class/backlight:
- intel-backlight
+ actual_brightness => 4438
+ bl_power => 0
+ brightness => 4438
+ max_brightness => 4438
- acpi_video0
+ actual_brightness => 100
+ bl_power => 0
+ brightness => 100
+ max_brightness => 100
=== Tests ===
echo 0 > acpi_video0/brightness => doesn't do anything
echo 0 > intel_backlight/brightness => works
---
ApportVersion: 2.8-0ubuntu1
Architecture: amd64
CheckboxSubmission: 12108b8b8b67d760cdd84f1b9574e7f3
CheckboxSystem: bb422ca46d02494cdbc459927a98bc2f
DistroRelease: Ubuntu 13.04
InstallationDate: Installed on 2012-09-02 (129 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120902)
MarkForUpload: True
Package: linux (not installed)
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 3.8.0-0.1-generic 3.8.0-rc3
Tags: raring
Uname: Linux 3.8.0-0-generic x86_64
UnreportableReason: The running kernel is not an Ubuntu kernel
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:
WORKAROUND:
Add to /etc/default/grub
in the variable "GRUB_CMDLINE_LINUX_DEFAULT":
acpi_osi=\"!Windows 2012\"
e.g:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=\"!Windows 2012\"" |
== Raring SRU Justification ==
Impact: A number of ThinkPad models have a workaround in the ACPI
backlight implementation for Windows 8 that more or less completely
breaks backlight control.
Fix: Add an OSI quirk to no longer claim to be Windows 8 on these
machines, causing the firmware to revert to the older, working behavior.
Test Case: Verified on LP #1098216 and bugzill.kernel.org #51231.
---
Something changed between the 3.5 and the 3.7 kernel, leading to broken brightness control on my Thinkpad x230.
Here are some test results:
== 3.5.0-21-generic ==
=== Post-boot values ===
/sys/class/backlight:
- intel-backlight
+ actual_brightness => 4438
+ bl_power => 0
+ brightness => 4438
+ max_brightness => 4438
- acpi_video0
+ actual_brightness => 15
+ bl_power => 0
+ brightness => 15
+ max_brightness => 15
=== Tests ===
echo 0 > acpi_video0/brightness => works
echo 0 > intel_backlight/brightness => works
== 3.8.0-0-generic ==
=== Post-boot values ===
/sys/class/backlight:
- intel-backlight
+ actual_brightness => 4438
+ bl_power => 0
+ brightness => 4438
+ max_brightness => 4438
- acpi_video0
+ actual_brightness => 100
+ bl_power => 0
+ brightness => 100
+ max_brightness => 100
=== Tests ===
echo 0 > acpi_video0/brightness => doesn't do anything
echo 0 > intel_backlight/brightness => works
---
ApportVersion: 2.8-0ubuntu1
Architecture: amd64
CheckboxSubmission: 12108b8b8b67d760cdd84f1b9574e7f3
CheckboxSystem: bb422ca46d02494cdbc459927a98bc2f
DistroRelease: Ubuntu 13.04
InstallationDate: Installed on 2012-09-02 (129 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha amd64 (20120902)
MarkForUpload: True
Package: linux (not installed)
ProcEnviron:
LANGUAGE=en_US:en
TERM=xterm
PATH=(custom, no user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcVersionSignature: Ubuntu 3.8.0-0.1-generic 3.8.0-rc3
Tags: raring
Uname: Linux 3.8.0-0-generic x86_64
UnreportableReason: The running kernel is not an Ubuntu kernel
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:
WORKAROUND:
Add to /etc/default/grub
in the variable "GRUB_CMDLINE_LINUX_DEFAULT":
acpi_osi=\"!Windows 2012\"
e.g:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=\"!Windows 2012\""
Then run "sudo update-grub". |
|
| 2013-05-06 07:37:05 |
Marius B. Kotsbak |
summary |
Regression in brightness control on Lenovo Thinkpad X230 and X1 Carbon |
Regression in brightness control on Lenovo Thinkpad X230 (+tablet) and X1 Carbon |
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| 2013-05-08 13:41:30 |
Brad Figg |
tags |
apport-collected patch quantal raring |
apport-collected patch quantal raring verification-needed-raring |
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| 2013-05-08 15:28:19 |
Marius B. Kotsbak |
tags |
apport-collected patch quantal raring verification-needed-raring |
apport-collected patch quantal raring verification-done |
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| 2013-05-09 09:04:48 |
jnns |
removed subscriber jnns |
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| 2013-05-13 13:03:27 |
Julian Wiedmann |
bug |
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added subscriber Julian Wiedmann |
| 2013-05-13 22:55:56 |
Paul Brauner |
bug |
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added subscriber Paul Brauner |
| 2013-05-19 07:49:58 |
Launchpad Janitor |
branch linked |
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lp:ubuntu/raring-proposed/linux-ppc |
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| 2013-05-25 17:55:22 |
Stefan H. |
removed subscriber Stefan H. |
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| 2013-05-29 14:13:43 |
Julian Wiedmann |
removed subscriber Julian Wiedmann |
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|
| 2013-06-10 20:13:15 |
Bug Watch Updater |
linux: status |
Incomplete |
In Progress |
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| 2013-06-12 19:22:43 |
Oliver Sauder |
bug |
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added subscriber Oliver Sauder |
| 2013-06-13 15:50:17 |
Romi |
bug |
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added subscriber Romi |
| 2013-06-17 20:14:05 |
Bug Watch Updater |
linux: status |
In Progress |
Incomplete |
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| 2013-07-02 11:03:33 |
Bug Watch Updater |
linux: status |
Incomplete |
In Progress |
|
| 2013-07-12 15:24:55 |
Olivier Bilodeau |
bug |
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added subscriber Olivier Bilodeau |
| 2013-07-16 15:55:29 |
Launchpad Janitor |
branch linked |
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lp:ubuntu/precise-proposed/linux-lts-raring |
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| 2013-07-30 19:53:49 |
Rafael P. |
bug |
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added subscriber Rafael P. |
| 2013-08-08 01:16:52 |
nickolai |
bug |
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added subscriber nickolai |
| 2013-09-01 23:35:17 |
lepri13 |
bug |
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added subscriber lepri13 |
| 2013-09-02 09:37:11 |
Jens Füllenbach |
removed subscriber Jens Füllenbach |
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| 2013-11-11 18:20:22 |
Tabris |
bug |
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added subscriber Tabris |
| 2014-03-14 21:27:14 |
Francois Thirioux |
tags |
apport-collected patch quantal raring verification-done |
apport-collected patch quantal raring trusty verification-done |
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| 2015-03-20 19:39:17 |
flickerfly |
bug |
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added subscriber flickerfly |
| 2015-11-09 20:05:17 |
Stéphane Graber |
removed subscriber Stéphane Graber |
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| 2017-10-28 08:41:52 |
Bug Watch Updater |
linux (Fedora): status |
Unknown |
Fix Released |
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| 2017-10-28 08:41:52 |
Bug Watch Updater |
linux (Fedora): importance |
Unknown |
High |
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| 2021-10-15 23:19:18 |
Bug Watch Updater |
linux: status |
In Progress |
Fix Released |
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| 2021-10-15 23:19:26 |
Bug Watch Updater |
bug watch added |
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https://bugzilla.kernel.org/show_bug.cgi?id=47861 |
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| 2021-10-15 23:19:26 |
Bug Watch Updater |
bug watch added |
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https://bugs.freedesktop.org/show_bug.cgi?id=66367 |
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| 2021-10-15 23:19:26 |
Bug Watch Updater |
bug watch added |
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https://bugzilla.kernel.org/show_bug.cgi?id=81691 |
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