Experiment on a KDE machine

I did in the original setup, yes, I set the value to 10. In the latest install I did not yet do that. Why, can that be a cause of the problems I had? I don’t have them now anymore.

It can cause rather aggressive swapping, yes. I think “normal” is about 60. Nowadays I don’t bother messing with swappiness at all, although I have found it very handy with low-RAM systems in the past.

regards

I noticed that just above 2GB of used RAM Swap started to be used. Then RAM + Swap increased at about the same rate until RAM was at 3GB. After that only Swap increased.
Is that aggressive? No idea.

It’s writing to disc even when you have plenty of free RAM (half of it) to spare, so some might call that pretty aggressive. I used ‘10’ on a 1-GB RAM i686 Netbook, where aggressive swappiness was called for in my use-case. With 8-GB it’s just not needed anymore.

You have 4-GB, so perhaps a higher setting might be more suitable. But I am far from being an expert in memory problems. I have enough faulty memory problems of my own. :wink:

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I will leave it at the default value of 60. See if this install works fine, I can always experiment later (after having created a nice backup of it all)
Thanks @c00ter

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What is troublesom is the fact that now I started with the “normal stable” KDE ISO from the Manjaro downloadpage I don’t have the errors I had when I started with the Illyria 18 alpha-1 ISO file:

  1. Dolphin (in preview mode) did not show previews
  2. Dolphin (in preview mode) showed additional information (size) about files and folders very slowly, per folder it took about 3 seconds before the info would show up. Screenshot_20180609_223436
  3. In Dolphin I could not start a program by clicking on a data file connected to it: text file - Kate, mp4 - VLC, png,jpg - Gwenview. I always had to start the program first and then use File->Open.
  4. Wallpaper slideshow would fill my memory in an alarming rate.

One remark: these errors did not exist immediately after installation of the OS. It was after some updates (and I had many) that they revealed themselves.

All of these erroros don’t exist. After installation of the Stable ISO I immediately switched to Unstable and continued with that.
If I only installed Illyria once I would say I did something which I shouldn’t have done, but I installed it more often and had these errors every time. Did I do every time the same thing I shouldn’t do?
Or does that mean there is something wrong with Illyria?

I am not seeing this either, change wallpaper every 10 seconds:

Sun Jun 10 01:46:44 BST 2018
              total        used        free      shared  buff/cache   available
Mem:          7.7Gi       2.1Gi       1.5Gi       209Mi       4.1Gi       5.1Gi
Swap:         1.5Gi          0B       1.5Gi
Sun Jun 10 01:46:54 BST 2018
              total        used        free      shared  buff/cache   available
Mem:          7.7Gi       2.1Gi       1.5Gi       211Mi       4.1Gi       5.1Gi
Swap:         1.5Gi          0B       1.5Gi
Sun Jun 10 01:47:04 BST 2018
              total        used        free      shared  buff/cache   available
Mem:          7.7Gi       2.1Gi       1.5Gi       210Mi       4.1Gi       5.1Gi
Swap:         1.5Gi          0B       1.5Gi
Sun Jun 10 01:47:14 BST 2018
              total        used        free      shared  buff/cache   available
Mem:          7.7Gi       2.1Gi       1.5Gi       209Mi       4.1Gi       5.1Gi
Swap:         1.5Gi          0B       1.5Gi
Sun Jun 10 01:47:24 BST 2018
              total        used        free      shared  buff/cache   available
Mem:          7.7Gi       2.1Gi       1.5Gi       211Mi       4.1Gi       5.1Gi
Swap:         1.5Gi          0B       1.5Gi
Sun Jun 10 01:47:34 BST 2018
              total        used        free      shared  buff/cache   available
Mem:          7.7Gi       2.1Gi       1.5Gi       210Mi       4.1Gi       5.1Gi
Swap:         1.5Gi          0B       1.5Gi
Sun Jun 10 01:47:44 BST 2018
              total        used        free      shared  buff/cache   available
Mem:          7.7Gi       2.2Gi       1.5Gi       208Mi       4.1Gi       5.1Gi
Swap:         1.5Gi          0B       1.5Gi
Sun Jun 10 01:47:54 BST 2018
              total        used        free      shared  buff/cache   available
Mem:          7.7Gi       2.2Gi       1.5Gi       208Mi       4.1Gi       5.1Gi
Swap:         1.5Gi          0B       1.5Gi
Sun Jun 10 01:48:04 BST 2018
              total        used        free      shared  buff/cache   available
Mem:          7.7Gi       2.1Gi       1.5Gi       208Mi       4.1Gi       5.1Gi
Swap:         1.5Gi          0B       1.5Gi
Sun Jun 10 01:48:14 BST 2018
              total        used        free      shared  buff/cache   available
Mem:          7.7Gi       2.2Gi       1.5Gi       208Mi       4.1Gi       5.0Gi
Swap:         1.5Gi          0B       1.5Gi
Sun Jun 10 01:48:24 BST 2018
              total        used        free      shared  buff/cache   available
Mem:          7.7Gi       2.2Gi       1.5Gi       209Mi       4.1Gi       5.0Gi
Swap:         1.5Gi          0B       1.5Gi

Will run it for a while tomorrow

while 1; do date >> test.txt && free -h >> test.txt; sleep 10; done 

Try disabling the caching of thumbnails and previews and see if that makes any difference. Just a thought.

I should mark this thread as solved since I don’t have the problems anymore. I re-installed Manjaro using the Stable release ISO instead of the Illyria alpha-1 ISO. Now everything works as hoped for.

To be honest, I don’t think it’s the thumbnails who clutter memory since the rise in memory use was too big for thumbnails. They were the real pictures.
But as said, it’s all over now.
Thanks.

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I now have the same issues with Dolphin as I had before with the previous installation:

  1. Dolphin (in preview mode) does not show previews
  2. Dolphin (in preview mode) shows additional information (size) about files and folders very slowly, per folder it took about 3 seconds before the info would show up.
    f23d2cdd9f47e4e43d9d98e8989e3ec9863913eb
  3. In Dolphin I can not start a program by clicking on a data file connected to it: text file - Kate, mp4 - VLC, png,jpg - Gwenview. I always had to start the program first and then use File->Open.

When I start Dolphin from a terminal I get:

dolphin
Invalid Type= "fixed" line for icon theme:  "/home/jan/.local/share/icons/Macos-sierra-CT-0.1.3.1/places/symbolic/"
qt.accessibility.core: Cannot create accessible child interface for object:  PlacesView(0x55ce978b7650)  index:  9
inotify_add_watch("/home/jan/.dropbox/aggregation.dbx") failed: "No such file or directory"
kf5.kio.core: We got some errors while running testparm "Load smb config files from /etc/samba/smb.conf\nError loading services.\n"
kf5.kio.core: We got some errors while running 'net usershare info'
kf5.kio.core: "Can't load /etc/samba/smb.conf - run testparm to debug it\n"
libpng warning: iCCP: known incorrect sRGB profile

I did have updates this morning and I installed conky-lua-nv using octopi. This is what pacman.log shows me from this morning:

[2018-06-10 07:10] [PACMAN] Running 'pacman -Syyu'
[2018-06-10 07:10] [PACMAN] synchronizing package lists
[2018-06-10 07:10] [PACMAN] starting full system upgrade
[2018-06-10 07:10] [ALPM] transaction started
[2018-06-10 07:10] [ALPM] upgraded mhwd-nvidia-340xx (340.106-1 -> 340.107-1)
[2018-06-10 07:10] [ALPM] upgraded p7zip (16.02-4 -> 16.02-5)
[2018-06-10 07:10] [ALPM] transaction completed
[2018-06-10 07:10] [ALPM] running 'systemd-update.hook'...
[2018-06-10 07:10] [PACMAN] Running 'pacman --color auto -Syy'
[2018-06-10 07:10] [PACMAN] synchronizing package lists
[2018-06-10 07:10] [PACMAN] Running 'pacman -Rsn'
[2018-06-10 07:25] [PACMAN] Running 'pacman -S date'
[2018-06-10 10:39] [PACMAN] Running 'pacman -S --noconfirm community/conky-lua-nv'
[2018-06-10 10:39] [ALPM] transaction started
[2018-06-10 10:39] [ALPM] installed wireless_tools (30.pre9-2)
[2018-06-10 10:39] [ALPM] installed libxnvctrl (396.24-1)
[2018-06-10 10:39] [ALPM] installed lua51 (5.1.5-6)
[2018-06-10 10:39] [ALPM] installed tolua++ (1.0.93-3)
[2018-06-10 10:39] [ALPM] installed conky-lua-nv (1.10.6-2)
[2018-06-10 10:39] [ALPM] transaction completed
[2018-06-10 10:39] [ALPM] running 'systemd-update.hook'...

To the best of my knowledge I can say that last night I did not have these problems. I just wanted to add my Conky when I found out that I could not open the conky file in Dolphin by just clicking on it.

Do I have something wrong in the terminal outputs as far as you can tell?

[EDIT} Looking at the time I posted post 16 and the time of updates and installs last night, I posted here after all was installed and updated. At that time it was all working. If caused by updates, it should be the updates of today, right?
Today two updates:

[2018-06-10 07:10] [ALPM] upgraded mhwd-nvidia-340xx (340.106-1 -> 340.107-1)
[2018-06-10 07:10] [ALPM] upgraded p7zip (16.02-4 -> 16.02-5)

I later exchanged conky-lua-nv for conky, bu that was after I found out things are wrong again.

They all look harmless - except perhaps the samba message.

First message - an error in your icon theme.

Second message - uninstall dropbox / delete ~/.dropbox / reinstall dropbox (but I don’t have this file either and do not get the error)

Third - do not use samba, so no idea :wink:

libpng is just a warning about a file that does not meet it’s expectations.

I removed the Dropbox service in Dolphin so that line is gone now, plus I don’t use samba so no idea why I get these lines.
One moment things are great and the next time you open it, it’s all wrong. WHY??? :cry:

[EDIT} Already filed a bug report at KDE: https://bugs.kde.org/show_bug.cgi?id=395143

Anyone an idea what this means:

qt.accessibility.core: Cannot create accessible child interface for object:  PlacesView(0x559d091794d0)  index:  9

I get this when I start Dolphin in a terminal. Google is, at least for me, not very helpful.

Try DDG, then! …or better search in Qt docs/forums

I did use DDG since it is the default search machine in Falkon, but the answers I got don’t make any sense to me. Could well be written in Swahili.
I read an answer and am lost at the first few words already.
I filed a bugreport at KDE so I guess I just have to sit this one out. Just wondering if you guys also have this problem? It was good and then suddenly Dolphin is acting very strange with all sorts of things going wrong. If only I knew what is causing it.

I found this in a Manjaro forum thread:


When I start dolphin with dbus-launch dolphin all is well. All the problems I have with Dolphin are gone.
But this is not the normal way to start Dolphin so something is wrong. But what and how to solve it?

@anon35400795: this is what you wrote in the thread I linked to:
just restart (logout+login). That happens because Qt(Dolphin) loads this plugin, then you do an update and Qt conflicts the loadup of the new version, because its still holding the old version in RAM.
What do you mean here? I have rebooted several times already but I can’t start Dolphin the normal way.

That if you upgrade your Qt version while running Qt-Apps, you might be unable to do certain actions, because Qt can not load plugins from different versions. Since framework5 is also just a bunch of Qt extensions, its the same with Framework 5.

Okay, I sort of get that. But, what can I do about it now? Can it be fixed, or should I learn to live with it, or maybe do a re-install (which I have done already yesterday) and maybe get this again?
Any idea how to solve this now?

I have the same issue when dolphin is run in terminal:

qt.accessibility.core: Cannot create accessible child interface for object:  PlacesView(0x55a7f644d3c0)  index:  16
inotify_add_watch("/home/michaldybczak/.dropbox/aggregation.dbx") failed: "No such file or directory"

However, I do get previews when I turn on the feature and also have no issues starting programs with related files so those errors are of no consequence to me.

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