Slow kde/plasma startup
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Hello!
I have pretty old PC (what matters most - I have HDD, not SSD), so I don't expect very fast responses from any program I use... But for some reason KDE launch usually takes appr. 70-90 seconds, which I believe is too much even for my PC. I talk exactly about the time between: 1. entering login+password in SDDM 2. having KDE finally launched (desktop, toolbars displayed) Kernel+systemd initialization are not counted - just for information, I attach systemd-analyze output
Below I attach the part of KSystemLog output, with messages created during kde/plasma initialization. Also I upload the same information on a couple of paste sites - maybe it'll be more comfortable for someone: https://dpaste.de/Sqpn and https://paste.pound-python.org/show/99K ... xDqhXt49t/ What I need: please help me understand information below and determine, is it OK and my PC is just slow, or are there any problems which can cause freezes and I can try to fix them somehow. If some additional info is needed - I can give it, just mention what exactly you need.
upd: A couple of things that I forgot to mention: 1. I use KDE more than a year already, and startup was always slow (updated it many times, had no effect). 2. When I tried to install MATE few months back - it's startup was MUCH faster, but I wasn't really going to use it and thought 'probably KDE is just heavier'. 3. Recently a friend of mine installed Arch Linux with KDE on a laptop which is weaker than my PC (and also has HDD, not SSD) - and he says KDE launch takes like 10-20 seconds. So I started to suspect that something is wrong at my side. KDE built-in "About system" : 
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Registered Member
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At here, Qt 5.10/Plasma 5.11.5, the KDE/Plasma start is about 5 s - earlier: Optimizing Plasma startup speed? - viewtopic.php?f=66&t=139751
This may help you to pin the problem: Bug 363042 - Splash screen frozen for ~20-30 seconds - https://bugs.kde.org/show_bug.cgi?id=363042 Note the plasma developer comment: https://bugs.kde.org/show_bug.cgi?id=363042#c7
KDE Forums: XDG_CACHE_HOME Might Be the Reason of Slow Startup - viewtopic.php?f=66&t=140083 and a recent topic from the KDE Reddit: Why does KDE take so long to start up? - https://www.reddit.com/r/kde/comments/7 ... _start_up/ has some tips... |
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Registered Member
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Holy...
So, finally I bought myself SSD, and moved my system to it instead of HDD. Plasma startup time changed from ~ 2 minutes to something like 3-5 seconds. @Rog131, thanks for your suggestions. I tried a couple of things from your recommendations, but it didn't change anything, so I decided to wait until I test result on different hardware. |
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Registered Member
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Hi there!
Please help with this boot issue, I have the same problem like above but it is not hardware. Boot to KDE Login Screen takes 15 seconds. After typing password the loading time till I see the desktop takes 79 seconds. I had 16.04 with 10 secs load to the desktop from Login. I upgraded to 18.04 and this 79 secs, almost 1.5 minutes just too much. systemd-analyze, systemd-analyze blame, systemd-analyze critical-chain, /var/log/boot.log, systemd-analyze plot > boot.svg are not related to this issue. System info:
I can post my kde log but I don't know what I should look for (journalctl --since=today -f | grep --line-buffered kde > plasma_kde.txt) H. |
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Registered Member
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Hi brother,
I had a similar problem on KAOS after installing the latest iso build. I tried to find the culprit using journalctl by this command:
This command will give messages after boot. It is better to run this soon after logging in. Otherwise with passage of time, length of messages will grow. Anyways, the critical time in my
file was here:
As you can see, there are two delays. A nearly 27s delay after starting "Application launcher". There is further 19s delay due to some XCB errors thrown by Qt. On another forum I read that there is some issue with ksplash. So I disabled splash animation in Settings > Workspace Theme > Splash Screen > None. Maybe there is a bug in ksplash. But this removed one issue. The QXcb warnings are just warnings. Xserver and Qt are probably not playing well after recent qt update. This warning can be safely turned off. To do this, please add:
at end of .bashrc for one user or in /etc/profile for all users. I added in /etc/profile After these two steps, my login again became instantaneous(even better than it was on Manjaro a few months earlier). I had earlier(before finding solution) tried to log in using Plasma Wayland. This was pretty fast. Going from sddm to desktop under Xserver was slow(nearly 50s). Therefore I think the bug is somewhere in interaction of Qt with Xserver. |
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