Ubuntu 14.04 blank screen after wakeup from sleep on Toshiba Satellite (M50D-A-100)

[Tomas Van Verrewegen]

Since my last update (+-5 days ago), every time my laptop goes to sleep, I get a black screen without backlight when I open the lid, or press the power key to wake it up.

Description: Ubuntu 14.04.1 LTS
Release: 14.04

See: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1283938/comments/110

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-35-generic 3.13.0-35.62
ProcVersionSignature: Ubuntu 3.13.0-35.62-generic 3.13.11.6
Uname: Linux 3.13.0-35-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.14.1-0ubuntu3.4
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: tomas 2563 F.... pulseaudio
                      tomas 2870 F.... pulseaudio
 /dev/snd/controlC0: tomas 2563 F.... pulseaudio
                      tomas 2870 F.... pulseaudio
CurrentDesktop: KDE
Date: Thu Sep 25 16:20:20 2014
HibernationDevice: RESUME=UUID=d2fd1cf4-e11c-480e-8d66-bbcca1016bdf
InstallationDate: Installed on 2014-01-17 (250 days ago)
InstallationMedia: Kubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
MachineType: TOSHIBA SATELLITE M50D-A
ProcFB: 0 VESA VGA
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-35-generic root=UUID=4517aa0b-909b-4d2a-a134-4ab34edf82de ro nomodeset quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-35-generic N/A
 linux-backports-modules-3.13.0-35-generic N/A
 linux-firmware 1.127.6
SourcePackage: linux
UpgradeStatus: Upgraded to trusty on 2014-04-20 (158 days ago)
dmi.bios.date: 08/05/2013
dmi.bios.vendor: TOSHIBA
dmi.bios.version: 1.10
dmi.board.asset.tag: *
dmi.board.name: ZEMAE
dmi.board.vendor: TOSHIBA
dmi.board.version: 1.00
dmi.chassis.asset.tag: *
dmi.chassis.type: 10
dmi.chassis.vendor: TOSHIBA
dmi.chassis.version: *
dmi.modalias: dmi:bvnTOSHIBA:bvr1.10:bd08/05/2013:svnTOSHIBA:pnSATELLITEM50D-A:pvrPSKPSE-00600GBT:rvnTOSHIBA:rnZEMAE:rvr1.00:cvnTOSHIBA:ct10:cvr*:
dmi.product.name: SATELLITE M50D-A
dmi.product.version: PSKPSE-00600GBT
dmi.sys.vendor: TOSHIBA

[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-rc6-utopic/

[Tomas Van Verrewegen (tomasvanverrewegen)]

I've got a bit more info.

As you can also see in the 'mainline kernel install log' attachment, since this same update, I also have a graphics driver problem: no more opengl/hardware accelleration, with all of the 3 driver options (fglrx, fglrx-updates, xorg). Before I used fglrx-updates because this seemed to work the best of the 3 (not good, but better than the rest).

After install of the mainline kernel, I tried switching to the xorg option: still no opengl, but at least suspend/resume seems to work now! When I resume the computer, I get a flash of random multicolored dots and stripes, but I don't have to ctrl-alt-del anymore.

[Tomas Van Verrewegen (tomasvanverrewegen)]

One more very weird thing: when I use the keyboard to increase or decrease screen brightness, the laptop goes to sleep. This didn't happen before.

I checked "systemsettings/shortcuts and gestures" but this seems ok: "decrease sceen brightness -> monitor brightness down"