Sometimes my computer slows down for no apparent reason. I was trying to find the culprit using htop, but it looks like this phenomenon affects the whole system, i.e. everything starts using a lot of CPU. Interestingly, if I suspend my computer and then wake it up, the problem goes away. Do you have any idea what could cause this? What kind of diagnostics should I run?
I'm running Xubuntu 20.04. RAM size: 12 GB, Swap: 2GB.
Many graphical elements are flickering all the time in the KDE Plasma environment. This problem is affecting the wallpaper, the panel, the login screen, as well as many others. Unfortunately, this makes the whole DE unusable. I'm not experiencing similar issues on any other DEs. Changing settings of the compositor doesn't help. I'm on a Lenovo T470s machine with intel graphics.
This might be related to the following issue, except in my case the whole desktop is affected (and also the proposed solution there doesn't work).
I'm getting this error message if I'm running Gnome Software Center from terminal.
Failed to setup plugins: Unable to find default local file monitor type
Dropbox is also giving me a similar error message and it doesn't sync.
My OS is Xubuntu 20.04.
After having used my computer for a few days, it started to freeze occasionally for a few seconds when I pressed certain buttons. Even when this started to happen I was not able figure out how to reproduce this phenomenon reliably. It seems to me that this was more likely to happen when I pressed keys (or combination of keys) to which certain tasks were assigned (like brightness keys or shortcuts). Also it always happened once for each button. (So for instance I pressed the mute key then it froze but after that I didn't freeze when I pressed it again.)
Logging out and logging in again resolves the issue (no reboot needed). I only experienced this problem in the XFCE environment, but I don't know if this bug is specific to it.
My VLC player crashes every time I'm trying to open any video file. Removing/purging vlc, and reinstalling it does not change anything.
I recently upgraded my distro to 20.04 from 19.10. I never had this problem on any other operating system before. I also tried to reinstall the whole operating system from scratch (because I also had some other minor issues). Then VLC worked fine on a fresh installation, but at some point it started to crash again, and now again it always crashes.
Running vlc from terminal gives the following output when I try opening a file.
[00005586d4e98290] main libvlc: Running vlc with the default interface. Use 'cvlc' to use vlc without interface.
[00005586d4f6d1c0] main audio output error: too low audio sample frequency (0)
[00007fa264ccaa20] main decoder error: failed to create audio output
[00005586d4f6d1c0] vlcpulse audio output error: digital pass-through stream connection failure: Not supported
[00005586d4f6d1c0] main audio output error: module not functional
[00007fa264ccaa20] main decoder error: failed to create audio output
libva info: VA-API version 1.7.0
libva info: Trying to open /usr/lib/x86_64-linux-gnu/dri/iHD_drv_video.so
libva info: Found init function __vaDriverInit_1_7
libva info: va_openDriver() returns 0
Segmentation fault (core dumped)
And this is the log about that shown in the gnome-logs:
vlc[602364]: segfault at 24 ip 00007fe5731011d4 sp 00007fe546ff6c50 error 6 in iris_dri.so[7fe5726d0000+d48000]