I have Lubuntu 18.04.6 installed on a Dell Inspiron laptop. When I press suspend button, my laptop does not goes to suspend mode and just the screen turns off and if I‌ press a key or move the mouse, screen turns on and Locked-Screen page is displayed.

Some times, after this unsuccessful suspend, after I logged in again, this message is displayed under the shutdown window:

GDBus.Error: org.freedesktop.DBus.Error.NoReply: Message recipient disconnected from message bus without replying

Timeout has reached

and a dialog is popped up that says:

Authentication is required for suspending the system

and asks me to enter password. But after entering password nothing occurs!

Anyone can help me?

  • FYI: Lubuntu 18.04 LTS is no longer supported; refer lubuntu.me/bionic-eol or fridge.ubuntu.com/2020/08/14/ubuntu-18-04-5-lts-released where you'll note only Ubuntu Server, Ubuntu Desktop & Ubuntu Cloud come with 5 years of support; flavors had shorter lives. I'd suggest using ubuntu-support-status to assess the security status of your actual install. Your question is still on-topic here, but consider how much security matters to you and the results of prior command. You're now using Ubuntu 18.04 LTS with LXDE (not Lubuntu).
    – guiverc
    Mar 16, 2022 at 21:21
  • You didn't say which kernel stack you're using (HWE or GA), as by switching stack you may find an easy solution. wiki.ubuntu.com/Kernel/LTSEnablementStack With Lubuntu, the installation media used controlled which kernel stack was used.
    – guiverc
    Mar 16, 2022 at 21:22

1 Answer 1


Still, in 2022, Lubuntu 18.04.6 is the best. Super fast, and good for old PCs. I have solved this problem by editing my polkit settings to allow anyone to suspend by

sudo leafpad /usr/share/polkit-1/actions/org.freedesktop.login1.policy

Locate the section that says Change the settings to:



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