Backlight not turned on by resume

[James Cobban]

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.

[James Cobban (7-webmaster)]

Also tested with kernel 3.18-rc5 and 3.18-rc6

[Brad Figg (brad-figg)]

This change was made by a bot.

[James Cobban (7-webmaster)]

On 12/12/2014 10:33 PM, Christopher M. Penalver wrote:
> *** This bug is a duplicate of bug 1392460 ***
> https://bugs.launchpad.net/bugs/1392460
>
> ** This bug has been marked a duplicate of bug 1392460
> resume hang ubuntu 14.10 kernel 3.16
>
But you refuse to act on that previous bug, demanding that I do
something but not telling me what it is you want me to do! Can you
change the title of the other bug to "Backlight not turned on by resume".

I do not want to be a pest but I have been having this problem for over
2 years and I cannot get any resolution.

--

Jim Cobban <email address hidden>
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Web-site: www.jamescobban.net <http://www.jamescobban.net/>
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