Comment 0 for bug 1774771

My laptop, a Thinkpad T450s, often hangs with a black screen on resume from suspend; I have to power off and back on to recover. I'd estimate that this happens perhaps one in every two or three resumes, so it's pretty annoying.

I'm currently running 18.04, but was on 16.04 up to a few months ago. I suspend relatively infrequently so I don't have great data, but my sense is that this happened occasionally on 16.04 but has become very much more frequent on 18.04.

I haven't been able to find any useful log information about what the problem might be: syslog has log entries for suspending and then goes straight into the log of the next successful boot, with nothing that I can see relevant to the failed resume. I'm willing to dig given specific pointers, though.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-22-generic 4.15.0-22.24
ProcVersionSignature: Ubuntu 4.15.0-22.24-generic 4.15.17
Uname: Linux 4.15.0-22-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.9-0ubuntu7.1
Architecture: amd64
CurrentDesktop: GNOME
Date: Sat Jun 2 11:30:18 2018
EcryptfsInUse: Yes
InstallationDate: Installed on 2013-03-01 (1918 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Alpha amd64 (20130223.1)
SourcePackage: linux-signed
UpgradeStatus: No upgrade log present (probably fresh install)