Home / user-94340

Wirawan Purwanto's questions

Martin Hope
Wirawan Purwanto
Asked: 2020-06-30 06:08:36 +0800 CST
  • 0

I recently installed Ubuntu 20.04, originally with MATE desktop. But due to an issue that that Xorg is gluttonously eating up my memory (see the linked Ubuntu bug for more detailed), I installed xfce desktop on top of the existing installation. Here are the Ubuntu packages I installed:

  • xfce4
  • xfce4-power-manager
  • xfce4-screensaver

But here is the problem. In my desktop environment, from time to time I noted that the screensaver failed to engage (turn on) even after many HOURS I left the computer behind. One, this is a security concern, but the other, it is a power and hardware longevity concern. This failure happens both under XFCE and MATE desktop. I first tried to ask this on Ubuntu Forums to no avail, so now turning to askubuntu.

Can you help me drill down to the root of this problem? To be clear, I am now focusing on the issue I noted with xfce4-screensaver, not with mate-screensaver as per the originally posted question in the linked forum.

A few additional points I've discovered:

  • My current desktop usage: the open GUI programs are usually LibreOffice and Firefox. I don't play a video in Firefox when this problem occured.

  • A few days ago I discovered that that screensaver problem suddenly "disappeared" when I closed Firefox. That is odd. Seemingly Firefox was mucking with the screensaver inhibit for a reason I don't know. Problem is, I am unfamiliar with screensaver inhibit in today's Linux desktop, so I don't know where to hunt for problems. I had the screensaver running with debug output, so I can supply parts and pieces of it if it helps.

  • I suspect something with systemd or logind is at play here. Again, because of my unfamiliarity, this suspicion is unfounded right now.

  • The problem happens randomly, I still don't know what trigger the issue.

NOTE: Since this is a production machine with lots of "moving parts" and I rely heavily on it 7 days a week, please don't ask me to reinstall everything from scratch with xubuntu-desktop. I won't do it. That is the "Windows user" mentality (always reinstall, always reboot).

xfce screensaver
Martin Hope
Wirawan Purwanto
Asked: 2020-05-30 21:12:33 +0800 CST
  • 2

I have quite a number of bind-mounted directories on my computer (running Ubuntu 20.04 MATE edition). Unfortunately they all showed up under "Devices" on the left sidebar of Caja file manager. I wonder if these bind-mounted "mount points" can be hidden (or if certain paths can be excluded from the list of devices shown in Caja). They become clutter and I really don't want them to show up as "devices". Because they are not.

Wirawan

mount mate
Martin Hope
Wirawan Purwanto
Asked: 2019-09-04 07:36:07 +0800 CST
  • 15

This is pertaining Ubuntu 18.04 LTS. I tried to save space by removing unneeded Linux kernel, but looks like it will still install other kernel image that is "Unsigned". Why is this?

Here is the log:

root@ubuntu18:~# apt-get remove linux-image-4.18.0-15-generic
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following additional packages will be installed:
  linux-image-unsigned-4.18.0-15-generic
Suggested packages:
  fdutils linux-hwe-doc-4.18.0 | linux-hwe-source-4.18.0 linux-hwe-tools
The following packages will be REMOVED:
  linux-image-4.18.0-15-generic linux-modules-extra-4.18.0-15-generic
The following NEW packages will be installed:
  linux-image-unsigned-4.18.0-15-generic
0 upgraded, 1 newly installed, 2 to remove and 8 not upgraded.
Need to get 8,219 kB of archives.
After this operation, 168 MB disk space will be freed.
Do you want to continue? [Y/n]

The original Linux kernel version that ships with the distro appears to be version 4.18. The new version that was just installed was 5.0. So I wonder if there is a reason to "preserve" 4.18.

Wirawan

kernel apt