Public bug reported:
Hardware is Lenovo Yoga 2 13.3 convertible. Unfortunately, I have two
problems with suspend-to-RAM on Kubuntu 15.10.
* Problem one is already reported in bug report 1418295: Sometimes, the
screen freezes on resume. This seems to happen more often, when I happen
to touch the touchscreen in the seconds of resume. As this is already a
confirmed bug, no more info to it here.
* Problem two - and the more serious problem - is, that the whole system
freezes at the time of suspend-to-RAM, when it has been running for more
than two hours since boot or last resume. So, if I remember to interrupt
my work at least every two hours, press the power button (which I have
set to perform suspend-to-RAM), and then immediately wake up the system
again, I am fine. But if the system has run for more than two hours, and
I then do the suspend-to-RAM, it freezes before the suspend: The screen
turns black as it ought to in suspend-to-RAM, but the power does not go
off and the CPU fan keeps running. Input is no longer possible. In this
state, the only thing, that I can do, is a hard power-off: Press the
power-button for over 5 seconds.
This problem is very annoying.
I've had this problem since original install with Kubuntu 15.04. An
install to Kubuntu 15.10 in the last weeks didn't solve it.
I tried to report this bug also with ubuntu-bug, but it ended with a
segfault, after it displayed the aggregated data.
ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: xorg 1:7.7+7ubuntu4
ProcVersionSignature: Ubuntu 4.2.0-18.22-generic 4.2.3
Uname: Linux 4.2.0-18-generic x86_64
ApportVersion: 2.19.1-0ubuntu4
Architecture: amd64
CurrentDesktop: KDE
Date: Thu Nov 19 16:04:34 2015
InstallationDate: Installed on 2015-07-06 (135 days ago)
InstallationMedia: Kubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
SourcePackage: xorg
Symptom: display
UpgradeStatus: Upgraded to wily on 2015-10-18 (31 days ago)
** Affects: xorg (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug crash freeze kubuntu suspend
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https://bugs.launchpad.net/bugs/1517950
Title:
Kubuntu Freezes / Crashes on Suspend to RAM
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