Blank screen after locked screen.

[rmcd]

When 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-3.13.0-34-generic 3.13.0-34.60
ProcVersionSignature: Ubuntu 3.13.0-34.60-generic 3.13.11.4
Uname: Linux 3.13.0-34-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.14.1-0ubuntu3.3
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: rmcd 2224 F.... pulseaudio
 /dev/snd/controlC0: rmcd 2224 F.... pulseaudio
CurrentDesktop: XFCE
Date: Mon Aug 18 15:49:55 2014
HibernationDevice: RESUME=UUID=efde90cc-bb24-43bb-9662-8886fda1ebc3
InstallationDate: Installed on 2014-04-24 (116 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-3.13.0-34-generic root=UUID=c84e1a00-9bad-4918-9f90-8a80deb0b12b ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-34-generic N/A
 linux-backports-modules-3.13.0-34-generic N/A
 linux-firmware 1.127.5
RfKill:

SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/17/2014
dmi.bios.vendor: LENOVO
dmi.bios.version: 9SKT81AUS
dmi.board.name: MAHOBAY
dmi.board.vendor: LENOVO
dmi.board.version: NO DPK
dmi.chassis.type: 3
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.modalias: dmi:bvnLENOVO:bvr9SKT81AUS:bd06/17/2014:svnLENOVO:pn3212C9U:pvrThinkCentreM92p:rvnLENOVO:rnMAHOBAY:rvrNODPK:cvnLENOVO:ct3:cvrNone:
dmi.product.name: 3212C9U
dmi.product.version: ThinkCentre M92p
dmi.sys.vendor: LENOVO

[Brad Figg (brad-figg)]

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v3.17 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream'.
Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.17-rc1-utopic/

[rmcd (rmcd1024)]

My machine booted with kernel 3.17 but the video (AMD dual monitor) did not work properly and I could not get it to work. Sorry.

[penalvch (penalvch)]

rmcd, if you used the default Radeon drivers (i.e. removed fglrx) would this provide a WORKAROUND?

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]