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-   -   All Things KDE5/Plasma for Slackware Users. (https://www.linuxquestions.org/questions/slackware-14/all-things-kde5-plasma-for-slackware-users-4175670109/)

LuckyCyborg 05-27-2020 10:11 AM

Quote:

Originally Posted by montagdude (Post 6127892)
Eric has also mentioned that he intentionally builds the latest and greatest stuff monthly because he likes to have it, not because it's necessary. Even for -current, it doesn't really need to be updated that frequently. Pat could drop it in today and then just update to the latest LTS once before tagging 15.0.

About what LTS you talk here?

To still have LTS on this KDE software, we will need to stay with Plasma 5.18.x and Qt 5.12.x, then Mr. Volkerding should also rollback the Qt5 from 5.13.x to 5.12.x which will be supported until December 2021.

However, after Qt 5.12.x will be no more LTS release of Qt5 for the open-source users, because The Qt Company does not want anymore to support things like this.

In my humble opinion, there's no future for this playing with LTS releases in the the case of the KDE software and Qt5 ...

hitest 05-27-2020 10:48 AM

LuckyCyborg,

Thankfully Mr. Volkerding is the one making the decisions regarding KDE5. I trust Pat and the Slackware Team.

gmgf 05-29-2020 01:15 PM

Quote:

Originally Posted by drgibbon (Post 6124115)
A temporary fix is here. In brief, start settings from the terminal with:
Code:

QT_QUICK_CONTROLS_STYLE=Base systemsettings5
This at least lets you get in and make the changes you need. Not the best, but FWIW, my experience with Plasma 5 has been good overall.

I have compiled and installed qt5-5.15.0,this fix the problem. ;)

cwizardone 05-31-2020 09:01 AM

Why does kde runs the CPUs and GPU hotter than, e.g., Xfce?
I keep gKrellm running in one corner of the screen, regardless of the desktop being used, and, consistently, kde runs hotter than Xfce by as much as 15 degrees Fahrenheit.
With kde4 it is a difference of 8 to 10 degrees, ususally, but with kde5 the GPU runs as much as 15 degrees hotter.
It is not a problem, I'm just curious as to the cause.
Thanks.
:)

Regnad Kcin 05-31-2020 12:17 PM

KDE5 is doing more work than XFCE and it is more graphics intense than is XFCE, so it is reasonable that the KDE5 machine runs a bit hotter because computation generates heat. XFCE is lower overhead. KDE5 delivers more for me and naturally it has more computational overhead to do those nice things. I still run fluxbox sometimes but KDE5 is my daily driver.

I have tried various sorts of coolers and fan setups. At one time I was really big on keeping things quiet and I studied what creates fan noise and I worked hard at making my system quiet. I found that little fans make irritating high pitched noise that I hate. obstructions like gratings with holes in them next to fans also generate noise so I got rid of all of that stuff and bought larger 12 cm fans and got rid of all of my little dinky noisy fans and cut out all of those gratings with holes and covered them with wiry fan guards.

Next I noticed that some of the CPU intensive work I was doing such as aligning sequences and compilations and video rendering were making things hot enough to cause the system to slow itself down. Gradually I moved to water-cooling fans with radiators. I can feel the heat coming off of the radiators in the exhaust air. I set up the EFI fanspeed controls so that the fans speed up in sync with small fluctuations in the CPU heat and the water pump runs full speed all the time.

Because Changping district of Beijing is dusty I finally had to take action to dustproof my system. Dust will short out nvme cards and memory sticks. They arent ruined but do malfunction and cause alarming failures and you are stopped until you get the dust out. It's no fun at all. I went from my open box designs to an airtight box that has 2 large high quality fans in the bottom of the box that push in filtered air and the radiator fans and another 120mm fan pull air outward. My gigabyte GPU card has its own fan that gets pushed in filtered air and it rarely heats at at all even running 4 monitors. This is an m-itx system that is portable and in a box with a handle to lug it around.

It is not the quietest design but is very reliable and does not overheat. I like watercooling radiators and good fans and I like the fanscreens made by Thermaltake. They catch the dust and keep my machine dust-free inside. I also like the airtight design with positive pressure push fans blowing in the filtered air and exhausting hot air out of the box, with slightly overpowering fans on the push side so that there is a positive pressure in the box that keeps passive dust out.

cwizardone 05-31-2020 01:40 PM

Quote:

Originally Posted by Regnad Kcin (Post 6129353)
KDE5 is doing more work than XFCE and it is more graphics intense than is XFCE, so it is reasonable that the KDE5 machine runs a bit hotter because computation generates heat. XFCE is lower overhead. KDE5 delivers more for me and naturally it has more computational overhead to do those nice things. I still run fluxbox sometimes but KDE5 is my daily driver.
.............

Is there any verifiable proof that kde's increased CPU/GPU activity results in a better video and/or audio experience?
:)
My ears tell me kde does do a better job with the audio, but that could be subjective.
I've not seen any video improvement.

LuckyCyborg 05-31-2020 01:57 PM

1 Attachment(s)
Quote:

Originally Posted by cwizardone (Post 6129373)
Is there any verifiable proof that kde's increased CPU/GPU activity results in a better video and/or audio experience?
:)
My ears tell me kde does do a better job with the audio, but that could be subjective.
I've not seen any video improvement.

In fact the KDE4 and specially the Plasma5 hammers your CPU and graphics card, making even the entire desktop considerable slower under older/cheaper boxes, with a sole reason: the fancy desktop effects.

From my own experience, most of that additional GPU and CPU power are eaten for two lame things desktop effects: the "background contrast" which usually I disable and for "blur" effect which usually I lower in strength like in the attached screenshot.

With this setup, the Plasma5 is just and only 2-3 times heavier than KDE4, with satisfactory effect on the system temperatures.

Poprocks 05-31-2020 02:02 PM

I have not had this same experience. For me plasma 5 has had surprisingly low memory and cpu usage such that it's been about the same as XFce or maybe ever so slightly more.

Plus plasma 5 has some of the best graphics optimizations I've ever seen, especially when it comes to compositing and vsync, which makes it look and feel faster. And for GUIs, perceived speed == speed.

Try running htop and see what is ramping up your cpu cycles. Baloo may be in its first run mode which can take a while to index all of your files in your home dir and does take a lot of CPU power to do so during this initial indexing.

LuckyCyborg 05-31-2020 02:04 PM

Quote:

Originally Posted by Poprocks (Post 6129377)
I have not had this same experience. For me plasma 5 has had surprisingly low memory and cpu usage such that it's been about the same as XFce or maybe ever so slightly more.

Plus plasma 5 has some of the best graphics optimizations I've ever seen, especially when it comes to compositing and vsync, which makes it look and feel faster. And for GUIs, perceived speed == speed.

Try running htop and see what is ramping up your cpu cycles. Baloo may be in its first run mode which can take a while to index all of your files in your home dir and does take a lot of CPU power to do so during this initial indexing.

Man, not everyone buys a gaming graphics card and a 16 cores box just to surf the internet and watch videos in Youtube... ;)

Jeebizz 05-31-2020 02:08 PM

Quote:

Originally Posted by LuckyCyborg (Post 6129378)
Man, not everyone buys a gaming graphics card and a 16 cores box just to surf the internet and watch videos in Youtube... ;)

I would buy that, only a much less powerful GPU. My main use of such a system would be VMs, and then maybe youtube :D, gaming for me would just be oldschool stuff that even a real cheap system by today's standards - spec wise can easily handle, i.e. emulating a Playstation 1 , SNES , and some DOS games :D.

Gerard Lally 05-31-2020 03:09 PM

I'd consider using plasma if they respected xterm colours set in ~/.Xresources, and if they allowed you to customise top and bottom panels easily. But they don't. As always with kde and gnome, they know best.

Jeebizz 05-31-2020 03:15 PM

I do legit want to at least try Plasma5; I have experimented with KDE4, and I do like again the fact that it can do without Akonadi, hopefully again that is the same in Plasma5. The only other hangup which is more of a minor detail is the horror stories of baloo; if it can be curtailed and disabled without breaking anything then I would have no issue with Plasma5. Given the specs of my systems, everything but a powerful GPU, my focus on resources should be something more productive, i.e. VMs or something, not eye candy. Don't get me wrong, I do like transparency effects in a terminal, but thats about it, I am not to keen on window animations and the like, to me it just feels distracting. Also again, I do look at things like maybe MATE as a suitable replacement to the effectively dead LXDE which I am still using right now, and as I stated in other posts - I am just not too convinced with LXQT, and I would be willing to even go for something like Plasma5 - if again it can be say, toned down in certain features that I just do not care for, and if I can achieve a great balance between minimal system resource utilization, and still a functioning Plasma5 - I am all for it.

sombragris 05-31-2020 04:04 PM

1 Attachment(s)
Quote:

Originally Posted by Poprocks (Post 6129377)
I have not had this same experience. For me plasma 5 has had surprisingly low memory and cpu usage such that it's been about the same as XFce or maybe ever so slightly more.

Plus plasma 5 has some of the best graphics optimizations I've ever seen, especially when it comes to compositing and vsync, which makes it look and feel faster. And for GUIs, perceived speed == speed.

Try running htop and see what is ramping up your cpu cycles. Baloo may be in its first run mode which can take a while to index all of your files in your home dir and does take a lot of CPU power to do so during this initial indexing.

Indeed. The attachment shows my temperatures under Plasma 5 at my full work load. Claws-mail, Firefox (with 62 tabs opened), audacious, Libre Office...

My CPU is an i7 but the GPU is just Intel onboard.

This load is comparable at the ones I saw on Mate.

cwizardone 05-31-2020 04:58 PM

@LuckyCyborg,
Thanks for the tip. I disabled the "blur effect" and the GPU temperature dropped 10 degress F.
:)


Quote:

Originally Posted by Jeebizz (Post 6129394)
I do legit want to at least try Plasma5; I have experimented with KDE4, and I do like again the fact that it can do without Akonadi, hopefully again that is the same in Plasma5. The only other hangup which is more of a minor detail is the horror stories of baloo.....

Yes, kde5 will run without akonadi.
You can turn off the search function, which disables baloo. Just to be sure you can fire up Xfce, go into its settings and then "application autostart," and remove the check mark, if there is one, in the box next to "baloo." Actually, you can do that, as user, from within a terminal while in kde5. Just type,
xfce4-settings-manager
at the prompt.

claudecat 05-31-2020 08:19 PM

I use kde5 on several distros including Slackware-current, also xfce on a few, and have never noticed any differences in CPU temperature or activity. I'm on an older rig too (Intel K 875 i7, Nvidia GT 430, 4GB RAM). For me, kde5 is just as responsive as any other DE. I have baloo disabled, but do use a fair amount of desktop effects/compositor bling with no discernible performance penalty. My kde5 idles at virtually 0 CPU usage, regardless of distro, Slackware included.


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