Question

5

Ubuntu 13.10 suspend crashes KDE / black screen on wake

rated 0 times [ 5] [ 0] / answers: 1 / hits: 7987 / 2 Years ago, fri, august 19, 2022, 6:25:51

Setup

I have a fresh install of Ubuntu 13.10, with KDE (installed via Ubuntu server disk and sudo apt-get install kubuntu-desktop).

Problem

Whenever I suspend the computer while in KDE (either via sudo pm-suspend in Konsole or via KDE's interface), I get a black screen on wake up.

Attempted workarounds / fixes

If I press ctrl+alt+f1 and then ctrl+alt+f7 and I'm patient (20-30 seconds), I sometimes get back into KDE where I was, or sometimes I get back to the login screen (KDE crashed). But even when I get back into KDE, I get a notification saying that the special effects had to restart due to a graphics problem and then the fonts in all applications are... garbled.

If I suspend from another tty with sudo pm-suspend (while KDE is running on tty7), it works flawlessly (resumes instantly - no need to wait 20-30 seconds, KDE does not crash and does not cause font garble).

I tried changing graphics drivers and I get the same thing (I have Nvidia NVS300 and I'm using the latest proprietary drivers in Ubuntu repos). Also tried this Ubuntu freezes/crash after wake when upgraded to 13.10 and it didn't work.

This problem did not occur on the same system, when I was running Kubuntu 12.04.

Trying to find the problem...

Dmesg doesn't show any errors. I don't even know where to look further for any errors (any KDE logs?). Any help appreciated.

Answers

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throecember

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4 Years ago

answered 2 Years ago ateact · Accepted Answer

I found this workaround. I made a script that switches to console before suspend and switches back after resume.

I put attached script into dir /etc/pm/sleep.d. I gave it the name fix-black-screen and made it executable (sudo chmod +x /etc/pm/sleep.d/fix-black-screen).

#!/bin/bash



case $1 in

suspend)

    # Suspending to RAM.

    chvt 1

    sleep 1

;;

resume)

    # Resume from suspend.

    sleep 1

    chvt 7

;;

esac

Original fix found here.