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Message #55356
[Bug 1308674] [NEW] On a X220, kernel 3.13 i915 brightness settings broken when going from docked -> undocked
Public bug reported:
This happens on my X220, running trusty, linux 3.13.0-24-generic. It's
the exact same problem discussed on
https://bugzilla.redhat.com/show_bug.cgi?id=1067071. Discussed also on
kernel mailing list: https://lkml.org/lkml/2014/2/19/720.
To reproduce, remove the X220 from the dock. The brightness is set to
minimum (the screen is nearly unreadable) and the brightness control is
broken, you can't adjust it by hardware keys.
My hardware:
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) (prog-if 00 [VGA controller])
Subsystem: Lenovo Device 21da
Kernel driver in use: i915
Docked on a ThinkPad mini dock series 3.
I have nothing much relevant in /var/log/syslog. Below there are
excerpts of it when brightness is working:
Apr 16 14:55:37 galactica kernel: [79261.217384] [drm:asle_set_backlight], bclp = 0x800000ff
Apr 16 14:55:37 galactica kernel: [79261.217390] [drm:asle_set_backlight], updating opregion backlight 255/255
Apr 16 14:55:37 galactica kernel: [79261.217394] [drm:intel_panel_get_max_backlight], max backlight PWM = 4648
Apr 16 14:55:37 galactica kernel: [79261.217396] [drm:intel_panel_actually_set_backlight], set backlight PWM = 4590
Apr 16 14:55:37 galactica kernel: [79261.217537] [drm:asle_set_pwm_freq], PWM freq is not supported
And brightness not working:
Apr 16 15:23:46 galactica kernel: [80948.263160] [drm:asle_set_backlight], bclp = 0x80000058
Apr 16 15:23:46 galactica kernel: [80948.263168] [drm:asle_set_pwm_freq], PWM freq is not supported
Apr 16 15:23:46 galactica kernel: [80948.280637] [drm:asle_set_backlight], bclp = 0x80000041
Apr 16 15:23:46 galactica kernel: [80948.280642] [drm:asle_set_pwm_freq], PWM freq is not supported
A workaround is to echo values directly to /sys/class/backlight/intel_backlight/brightness. Maximum brightness is 4648 (/sys/class/backlight/intel_backlight/max_brightness).
e.g.: # echo 500 > /sys/class/backlight/intel_backlight/brightness
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-24-generic 3.13.0-24.46
ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
Uname: Linux 3.13.0-24-generic i686
ApportVersion: 2.14.1-0ubuntu2
Architecture: i386
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: ursula 3881 F.... pulseaudio
/dev/snd/controlC0: ursula 3881 F.... pulseaudio
CurrentDesktop: Unity
Date: Wed Apr 16 15:09:23 2014
HibernationDevice: RESUME=UUID=68890e28-0eee-4184-9456-cc267c4a5f31
InstallationDate: Installed on 2013-05-27 (323 days ago)
InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release i386 (20130213)
MachineType: LENOVO 4286CTO
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic root=UUID=4db5451d-c250-47bc-9c4e-235fb1967ee5 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.13.0-24-generic N/A
linux-backports-modules-3.13.0-24-generic N/A
linux-firmware 1.127
SourcePackage: linux
UpgradeStatus: Upgraded to trusty on 2013-11-04 (162 days ago)
dmi.bios.date: 12/01/2011
dmi.bios.vendor: LENOVO
dmi.bios.version: 8DET56WW (1.26 )
dmi.board.asset.tag: Not Available
dmi.board.name: 4286CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr8DET56WW(1.26):bd12/01/2011:svnLENOVO:pn4286CTO:pvrThinkPadX220:rvnLENOVO:rn4286CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 4286CTO
dmi.product.version: ThinkPad X220
dmi.sys.vendor: LENOVO
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug i386 trusty
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1308674
Title:
On a X220, kernel 3.13 i915 brightness settings broken when going from
docked -> undocked
Status in “linux” package in Ubuntu:
New
Bug description:
This happens on my X220, running trusty, linux 3.13.0-24-generic. It's
the exact same problem discussed on
https://bugzilla.redhat.com/show_bug.cgi?id=1067071. Discussed also on
kernel mailing list: https://lkml.org/lkml/2014/2/19/720.
To reproduce, remove the X220 from the dock. The brightness is set to
minimum (the screen is nearly unreadable) and the brightness control
is broken, you can't adjust it by hardware keys.
My hardware:
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) (prog-if 00 [VGA controller])
Subsystem: Lenovo Device 21da
Kernel driver in use: i915
Docked on a ThinkPad mini dock series 3.
I have nothing much relevant in /var/log/syslog. Below there are
excerpts of it when brightness is working:
Apr 16 14:55:37 galactica kernel: [79261.217384] [drm:asle_set_backlight], bclp = 0x800000ff
Apr 16 14:55:37 galactica kernel: [79261.217390] [drm:asle_set_backlight], updating opregion backlight 255/255
Apr 16 14:55:37 galactica kernel: [79261.217394] [drm:intel_panel_get_max_backlight], max backlight PWM = 4648
Apr 16 14:55:37 galactica kernel: [79261.217396] [drm:intel_panel_actually_set_backlight], set backlight PWM = 4590
Apr 16 14:55:37 galactica kernel: [79261.217537] [drm:asle_set_pwm_freq], PWM freq is not supported
And brightness not working:
Apr 16 15:23:46 galactica kernel: [80948.263160] [drm:asle_set_backlight], bclp = 0x80000058
Apr 16 15:23:46 galactica kernel: [80948.263168] [drm:asle_set_pwm_freq], PWM freq is not supported
Apr 16 15:23:46 galactica kernel: [80948.280637] [drm:asle_set_backlight], bclp = 0x80000041
Apr 16 15:23:46 galactica kernel: [80948.280642] [drm:asle_set_pwm_freq], PWM freq is not supported
A workaround is to echo values directly to /sys/class/backlight/intel_backlight/brightness. Maximum brightness is 4648 (/sys/class/backlight/intel_backlight/max_brightness).
e.g.: # echo 500 > /sys/class/backlight/intel_backlight/brightness
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-24-generic 3.13.0-24.46
ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
Uname: Linux 3.13.0-24-generic i686
ApportVersion: 2.14.1-0ubuntu2
Architecture: i386
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: ursula 3881 F.... pulseaudio
/dev/snd/controlC0: ursula 3881 F.... pulseaudio
CurrentDesktop: Unity
Date: Wed Apr 16 15:09:23 2014
HibernationDevice: RESUME=UUID=68890e28-0eee-4184-9456-cc267c4a5f31
InstallationDate: Installed on 2013-05-27 (323 days ago)
InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release i386 (20130213)
MachineType: LENOVO 4286CTO
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-24-generic root=UUID=4db5451d-c250-47bc-9c4e-235fb1967ee5 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.13.0-24-generic N/A
linux-backports-modules-3.13.0-24-generic N/A
linux-firmware 1.127
SourcePackage: linux
UpgradeStatus: Upgraded to trusty on 2013-11-04 (162 days ago)
dmi.bios.date: 12/01/2011
dmi.bios.vendor: LENOVO
dmi.bios.version: 8DET56WW (1.26 )
dmi.board.asset.tag: Not Available
dmi.board.name: 4286CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr8DET56WW(1.26):bd12/01/2011:svnLENOVO:pn4286CTO:pvrThinkPadX220:rvnLENOVO:rn4286CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 4286CTO
dmi.product.version: ThinkPad X220
dmi.sys.vendor: LENOVO
To manage notifications about this bug go to:
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Follow ups
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[Bug 1308674] Re: [Lenovo ThinkPad X220] kernel 3.13 i915 brightness settings broken when going from docked -> undocked
From: Akif D., 2015-03-05
-
[Bug 1308674] Re: [Lenovo ThinkPad X220] kernel 3.13 i915 brightness settings broken when going from docked -> undocked
From: Alex Schmidt, 2015-03-05
-
[Bug 1308674] Re: [Lenovo ThinkPad X220] kernel 3.13 i915 brightness settings broken when going from docked -> undocked
From: Christopher M. Penalver, 2014-11-26
-
[Bug 1308674] Re: [Lenovo ThinkPad X220] kernel 3.13 i915 brightness settings broken when going from docked -> undocked
From: eliash, 2014-11-26
-
[Bug 1308674] Re: [Lenovo ThinkPad X220] kernel 3.13 i915 brightness settings broken when going from docked -> undocked
From: Akif D., 2014-11-22
-
[Bug 1308674] Re: [Lenovo ThinkPad X220] kernel 3.13 i915 brightness settings broken when going from docked -> undocked
From: Akif D., 2014-11-22
-
[Bug 1308674] Re: [Lenovo ThinkPad X220] kernel 3.13 i915 brightness settings broken when going from docked -> undocked
From: Matthias Baur, 2014-11-22
-
[Bug 1308674] Re: [Lenovo ThinkPad X220] kernel 3.13 i915 brightness settings broken when going from docked -> undocked
From: Akif D., 2014-11-19
-
[Bug 1308674] Re: [Lenovo ThinkPad X220] kernel 3.13 i915 brightness settings broken when going from docked -> undocked
From: arnuschky, 2014-11-19
-
[Bug 1308674] Re: [Lenovo ThinkPad X220] kernel 3.13 i915 brightness settings broken when going from docked -> undocked
From: Christopher M. Penalver, 2014-10-08
-
[Bug 1308674] Re: [Lenovo ThinkPad X220] kernel 3.13 i915 brightness settings broken when going from docked -> undocked
From: Akif D., 2014-10-08
-
[Bug 1308674] Re: [Lenovo ThinkPad X220] kernel 3.13 i915 brightness settings broken when going from docked -> undocked
From: Muelli, 2014-10-08
-
[Bug 1308674] Re: [Lenovo ThinkPad X220] kernel 3.13 i915 brightness settings broken when going from docked -> undocked
From: Christopher M. Penalver, 2014-10-03
-
[Bug 1308674] Re: [Lenovo ThinkPad X220] kernel 3.13 i915 brightness settings broken when going from docked -> undocked
From: Matthias Baur, 2014-10-02
-
[Bug 1308674] Re: [Lenovo ThinkPad X220] kernel 3.13 i915 brightness settings broken when going from docked -> undocked
From: adnc, 2014-10-01
-
[Bug 1308674] Re: [Lenovo ThinkPad X220] kernel 3.13 i915 brightness settings broken when going from docked -> undocked
From: Roger Kind Kristiansen, 2014-08-29
-
[Bug 1308674] Re: [Lenovo ThinkPad X220] kernel 3.13 i915 brightness settings broken when going from docked -> undocked
From: Roger Kind Kristiansen, 2014-08-29
-
[Bug 1308674] Re: [Lenovo ThinkPad X220] kernel 3.13 i915 brightness settings broken when going from docked -> undocked
From: Christopher M. Penalver, 2014-08-23
-
[Bug 1308674] Re: [Lenovo ThinkPad X220] kernel 3.13 i915 brightness settings broken when going from docked -> undocked
From: Daniel Hahler, 2014-08-15
-
[Bug 1308674] Re: [Lenovo ThinkPad X220] kernel 3.13 i915 brightness settings broken when going from docked -> undocked
From: tserries, 2014-06-05
-
[Bug 1308674] Re: [Lenovo ThinkPad X220] kernel 3.13 i915 brightness settings broken when going from docked -> undocked
From: Christopher M. Penalver, 2014-05-30
-
[Bug 1308674] Re: [Lenovo ThinkPad X220] kernel 3.13 i915 brightness settings broken when going from docked -> undocked
From: Siddharth Agarwal, 2014-05-30
-
[Bug 1308674] Re: [Lenovo ThinkPad X220] kernel 3.13 i915 brightness settings broken when going from docked -> undocked
From: Siddharth Agarwal, 2014-05-29
-
[Bug 1308674] Re: [Lenovo ThinkPad X220] kernel 3.13 i915 brightness settings broken when going from docked -> undocked
From: Christopher M. Penalver, 2014-04-28
-
[Bug 1308674] Re: On a X220, kernel 3.13 i915 brightness settings broken when going from docked -> undocked
From: Christopher M. Penalver, 2014-04-19
-
[Bug 1308674] Re: On a X220, kernel 3.13 i915 brightness settings broken when going from docked -> undocked
From: Joseph Salisbury, 2014-04-16
-
[Bug 1308674] Status changed to Confirmed
From: Brad Figg, 2014-04-16
-
[Bug 1308674] Re: On a X220, kernel 3.13 i915 brightness settings broken when going from docked -> undocked
From: Ursula Junque, 2014-04-16
-
[Bug 1308674] [NEW] On a X220, kernel 3.13 i915 brightness settings broken when going from docked -> undocked
From: Ursula Junque, 2014-04-16
References