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Message #95385
[Bug 1401672] Re: Backlight not turned on by resume
** Attachment added: "ssdt2.dat"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1401672/+attachment/4278936/+files/ssdt2.dat
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https://bugs.launchpad.net/bugs/1401672
Title:
Backlight not turned on by resume
Status in linux package in Ubuntu:
Confirmed
Bug description:
When the laptop resumes either from a manual suspend or from a suspend
as a result of closing the lid the operating system resumes but the
backlight on the display is not turned on, so nothing is visible. The
system is completely operational from an external point of view. For
example it is accessible by ssh, ftp, and http. The keyboard works so
the system can be restarted by Alt-PrtScrn-RSEIUB, but this loses all
outstanding activities. How do I attach multiple additional documents
that are recommended by the wiki for this class of problems.
ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: linux-image-3.16.0-25-generic 3.16.0-25.33
ProcVersionSignature: Ubuntu 3.16.0-25.33-generic 3.16.7
Uname: Linux 3.16.0-25-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.14.7-0ubuntu8
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: jcobban 2189 F.... pulseaudio
/dev/snd/controlC0: jcobban 2189 F.... pulseaudio
CurrentDesktop: Unity
Date: Thu Dec 11 16:10:42 2014
HibernationDevice: RESUME=UUID=e1d460c4-e29e-470e-a302-7891166d98f7
InstallationDate: Installed on 2014-11-22 (19 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
MachineType: Dell Inc. Vostro 3555
ProcFB: 0 radeondrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-25-generic root=UUID=5850bfca-8269-4a92-8fda-798e6557b0bd ro quiet splash
RelatedPackageVersions:
linux-restricted-modules-3.16.0-25-generic N/A
linux-backports-modules-3.16.0-25-generic N/A
linux-firmware 1.138
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/28/2014
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A06
dmi.board.name: 0K89MF
dmi.board.vendor: Dell Inc.
dmi.board.version: A06
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: Not Specified
dmi.modalias: dmi:bvnDellInc.:bvrA06:bd05/28/2014:svnDellInc.:pnVostro3555:pvrNotSpecified:rvnDellInc.:rn0K89MF:rvrA06:cvnDellInc.:ct8:cvrNotSpecified:
dmi.product.name: Vostro 3555
dmi.product.version: Not Specified
dmi.sys.vendor: Dell Inc.
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References