On 10/31/20 1:57 PM, George from the tribe wrote:
So I have now installed 15.2 on all 3 pcs that I
regularly use... All
overall very happy with the new system...
On my desktop only, I have had some issues with the system slowing
down and locking up. It seems to be related to plasma. My desktop has
an nvidia graphics card and I run 3 monitors off of it.
For background on the setup, I read somewhere, I think in the forums,
something about disabling an Xorg file or something like that, so that
the graphics driver it uses is the one that is part of the kernel? It
had me do something that disabled making it point to nouveau or a
proprietary nvidia driver, but I can't remember what I did. In any
case, the system seems to work ok except that sometimes I seem to get
these intermittent hangs. (If anyone can remember the link to the
tutorial that described that procedure that would be great, because I
am kicking myself now for not having bookmarked it.)
So I decided to fully reset kde by removing the .config directory and
set everything up again from scratch.
I have run into a snag in the setup now. I like to set a slideshow for
my desktop to pictures on my hard disk that I have taken. I noticed
that when configuring the desktop, the new applet for 15.2 provides a
thumbnail preview for every single picture that is added in when
setting up a slideshow. This is where the snag hits, and I think I
If I add a directory that just has 30 or so pictures, or even up to
100 or so pictures, it is no big deal. The system finds all the
pictures right away, makes thumbnails and puts the thumbnails in the
preview pane, and within a couple of seconds everything is fine.
The problem comes when I add one of my pictures directories that has
thousands and thousands of pictures. Because the applet is built so
that it won't let you out until it has retrieved thumbnails for every
single picture in every subdirectory, it locks up plasma. For a long
time. A really long time. I haven't found out how long because I have
to kill X every time with ctrl-alt-double backspace after 15 minutes
It clearly doesn't need to put preview thumbnails for all 30,000
pictures in that little applet. Perhaps someone on the development
team could modify the way it looks at that? Do I need to send this to
KDE instead of noting it here?
I haven't tried setting up a slideshow on my other 2 pcs, which are
both laptops and neither one uses nvidia, so I don't know for sure if
the problem is more with nvidia on my desktop or with the way the
applet is coded.
When you install the nvidia driver - whether from the opensuse
repository or using the "hard way" - it builds the kernel modules and
places a file in /etc/modprobe.d which starts it at boot, and another
file which blacklists nouveau so it won't try to start. Do 'lsmod |
grep nvidia' (as root) to see the modules that are currently loaded.
You are correct that the Folder View plasmoid uses thumbnails, probably
those stored in ./cache/thumbnails/*. I don't think this has anything
to do with the nvidia driver, it just can take a good while to build
30K. Once it's done though, doesn't need to be repeated. Just go take
a walk and let it finish.
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