Ubuntu 14.04 blank screen after wakeup from sleep

[rmcd]

This appears to be the same bug others have reported --- lock screen is used, the display goes blank, and then the display remains black after a key or the mouse is touched.

For me, this only occurs after the display has been blanked for a period of some hours (typically overnight).

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-30-generic 3.13.0-30.54
ProcVersionSignature: Ubuntu 3.13.0-30.54-generic 3.13.11.2
Uname: Linux 3.13.0-30-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: rmcd 2307 F.... pulseaudio
 /dev/snd/controlC0: rmcd 2307 F.... pulseaudio
CurrentDesktop: XFCE
Date: Thu Jul 3 09:59:56 2014
HibernationDevice: RESUME=UUID=efde90cc-bb24-43bb-9662-8886fda1ebc3
InstallationDate: Installed on 2014-04-24 (69 days ago)
InstallationMedia: Xubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140416.2)
MachineType: LENOVO 3212C9U
ProcFB: 0 VESA VGA
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-30-generic root=UUID=c84e1a00-9bad-4918-9f90-8a80deb0b12b ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-30-generic N/A
 linux-backports-modules-3.13.0-30-generic N/A
 linux-firmware 1.127.4
RfKill:

SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/31/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: 9SKT72AUS
dmi.board.name: MAHOBAY
dmi.board.vendor: LENOVO
dmi.board.version: NO DPK
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnLENOVO:bvr9SKT72AUS:bd07/31/2013:svnLENOVO:pn3212C9U:pvrThinkCentreM92p:rvnLENOVO:rnMAHOBAY:rvrNODPK:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: 3212C9U
dmi.product.version: ThinkCentre M92p
dmi.sys.vendor: LENOVO

[Brad Figg (brad-figg)]

This change was made by a bot.

[penalvch (penalvch)]

rmcd, thank you for reporting this and helping make Ubuntu better. As per http://download.lenovo.com/express/ddfm.html an update to your BIOS is available (9SKT81A). If you update to this following https://help.ubuntu.com/community/BiosUpdate does it change anything? If it doesn't, could you please both specify what happened, and provide the output of the following terminal command:
sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date

Please note your current BIOS is already in the Bug Description, so posting this on the old BIOS would not be helpful. As well, you don't have to create a new bug report. As well, you don't have to create a new bug report.

For more on BIOS updates and linux, please see https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette .

Thank you for your understanding.

[rmcd (rmcd1024)]

This problem has not occurred since, I believe, the -32 kernel upgrade. (I have to be tentative because it was always intermittent, but it did usually occur overnight and I have had periods of 1-2 days when the screen was locked without incident.)

Earlier this week I installed the new bios:

9SKT81AUS
06/17/2014

and the problem has not occurred since then.

Thanks!

[penalvch (penalvch)]

rmcd, this bug report is being closed due to your last comment https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1337373/comments/4 regarding this being fixed with a BIOS update. For future reference you can manage the status of your own bugs by clicking on the current status in the yellow line and then choosing a new status in the revealed drop down box. You can learn more about bug statuses at https://wiki.ubuntu.com/Bugs/Status. Thank you again for taking the time to report this bug and helping to make Ubuntu better. Please submit any future bugs you may find.