Patches addressing this issue for various models was released upstream
in 2016.
** No longer affects: linux (Ubuntu)
** Package changed: opensuse => linux (Ubuntu)
** Changed in: linux (Ubuntu)
Importance: Medium => Undecided
** Changed in: linux (Ubuntu)
Status: Won't Fix => New
** Changed in: linux (Ubuntu)
Remote watch: Novell/SUSE Bugzilla #711339 => None
** No longer affects: linux (Ubuntu)
** Package changed: fedora => ubuntu
** Changed in: ubuntu
Status: Won't Fix => New
** Changed in: ubuntu
Remote watch: Red Hat Bugzilla #755768 => None
** No longer affects: ubuntu
** Package changed: debian => linux (Ubuntu)
** Changed in: linux (Ubuntu)
Importance: Unknown => Undecided
** Changed in: linux (Ubuntu)
Status: Confirmed => New
** Changed in: linux (Ubuntu)
Remote watch: Debian Bug tracker #599768 => None
** No longer affects: linux (Ubuntu)
** Project changed: linux => linux (Ubuntu)
** Changed in: linux (Ubuntu)
Importance: Medium => Undecided
** Changed in: linux (Ubuntu)
Status: Confirmed => New
** Changed in: linux (Ubuntu)
Remote watch: Linux Kernel Bug Tracker #21012 => None
** Changed in: linux (Ubuntu)
Status: New => Invalid
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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/935778
Title:
Toshiba Tecra R840 - brightness controls work on first boot, but do
nothing after suspend/resume
Status in linux package in Ubuntu:
Invalid
Bug description:
Overview -
This bug affects many Toshiba laptops including R700, R705, R800,
R830, R835, R840, R850, Z930 models - please update this description
if your model is also affected, but make sure the symptoms match
exactly.
The symptoms are that brightness control operates normally when the
system is first booted, but after a suspend-to-RAM and resume cycle
the brightness controls have no effect.
After a normal reboot, or hibernate & resume cycle, the brightness
controls operate normally again.
This bug is tracked for the kernel at:
http://bugzilla.kernel.org/show_bug.cgi?id=21012
And for Debian at:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=599768
Please try to keep all info together and pass any progress to the
upstream trackers.
Original report for #935778 follows:
On my Toshiba R840, the brightness controls work fine on first boot,
but do nothing after suspend/resume. This is particularly frustrating
if I suspend with the screen at all dimmed, because once I resume, I
have no way of increasing the brightness short of a reboot.
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-generic 3.2.0.16.16
ProcVersionSignature: Ubuntu 3.2.0-16.25-generic 3.2.6
Uname: Linux 3.2.0-16-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 1.91-0ubuntu1
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: james 2251 F.... pulseaudio
/dev/snd/pcmC0D0p: james 2251 F...m pulseaudio
CRDA:
country EU:
(2402 - 2482 @ 40), (N/A, 20)
(5170 - 5250 @ 40), (N/A, 20)
(5250 - 5330 @ 40), (N/A, 20), DFS
(5490 - 5710 @ 40), (N/A, 27), DFS
Card0.Amixer.info:
Card hw:0 'PCH'/'HDA Intel PCH at 0xc4820000 irq 50'
Mixer name : 'Intel CougarPoint HDMI'
Components : 'HDA:10ec0269,1179062a,00100100
HDA:80862805,11790001,00100000'
Controls : 30
Simple ctrls : 12
Date: Sat Feb 18 21:27:12 2012
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
MachineType: TOSHIBA TECRA R840
ProcEnviron:
LANGUAGE=en_GB:en
PATH=(custom, no user)
LANG=en_GB.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-16-generic
root=UUID=16b08eff-30c4-4fe0-bede-cf8cb31270bf ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.2.0-16-generic N/A
linux-backports-modules-3.2.0-16-generic N/A
linux-firmware 1.69
RfKill:
0: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
SourcePackage: linux
StagingDrivers: mei
UpgradeStatus: Upgraded to precise on 2012-01-09 (39 days ago)
dmi.bios.date: 07/12/2011
dmi.bios.vendor: TOSHIBA
dmi.bios.version: Version 2.90
dmi.board.asset.tag: 0000000000
dmi.board.name: Portable PC
dmi.board.vendor: TOSHIBA
dmi.board.version: Version A0
dmi.chassis.asset.tag: 0000000000
dmi.chassis.type: 10
dmi.chassis.vendor: TOSHIBA
dmi.chassis.version: Version 1.0
dmi.modalias:
dmi:bvnTOSHIBA:bvrVersion2.90:bd07/12/2011:svnTOSHIBA:pnTECRAR840:pvrPT42GE-00N006EN:rvnTOSHIBA:rnPortablePC:rvrVersionA0:cvnTOSHIBA:ct10:cvrVersion1.0:
dmi.product.name: TECRA R840
dmi.product.version: PT42GE-00N006EN
dmi.sys.vendor: TOSHIBA
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