screen remains black after hibernation or suspend to RAM

[Yann Salmon]

I just installed XUbuntu 16.06 on my laptop.
Suspend to RAM and hibernation seem to work correctly, but resuming from either of it is not actually possible because the screen remains black. Concerning hibernation, this happens with the default hibernation method as well as with TuxOnIce.

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: xserver-xorg-video-nouveau 1:1.0.12-1build2
ProcVersionSignature: Ubuntu 4.4.0-21.37~ppa1-generic-tuxonice 4.4.6
Uname: Linux 4.4.0-21-generic-tuxonice x86_64
NonfreeKernelModules: wl
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
CurrentDesktop: XFCE
Date: Fri Apr 22 21:20:22 2016
InstallationDate: Installed on 2016-04-22 (0 days ago)
InstallationMedia: Xubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
SourcePackage: xserver-xorg-video-nouveau
UpgradeStatus: No upgrade log present (probably fresh install)

[Yann Salmon (yannsalmon)]

I thought apport would add this : the computer is a Dell Latitude E7450.

[ficestat (ficestat)]

I had the same issue on an E7450 laptop. Linux rune 4.6.0-040600rc4-generic #201604172330 SMP Mon Apr 18 03:32:32 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

I had upgraded the kernel, but this didn't fix the issue.

I upgraded the bios to a12, and now I can suspend and my display comes back.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Yann Salmon (yannsalmon)]

Thanks for the suggestion to upgrade the BIOS. The laptop is brand new, so I did not think the BIOS would be out of date.

I did the upgrade but the problem persists. Strangely, after opening the lid, the mouse cursor appears on the login screen (the session is automatically locked when the lid is closed). After unlocking the session, it disappears as said previously.

[penalvch (penalvch)]

YS1, thank you for reporting this and helping make Ubuntu better.

Could you please run the following command once from a terminal by ensuring you have the package xdiagnose installed, and that you click the Yes button for attaching additional debugging information:
apport-collect -p xorg 1573760

When reporting xorg related bugs in the future, please do so via the above method. You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs.

[Yann Salmon (yannsalmon)]

Hi,

I had not used my laptop in a while and your message prompted me to upgrade my packages and try again with a newer version before adding more information.

The problem I described does not occur anymore now -- I tried with the latest kernel 4.4.0-30-generic and with the latest tuxonice version 4.4.0-28-generic-tuxonice.

Thank you all !

Do you still want additional debugging information ?

[penalvch (penalvch)]

YS1, this bug report is being closed due to your last comment https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1573760/comments/7 regarding this being fixed with an 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.