Screen tearing in LibreOffice

users
#1

Good evening
I have been asking about this several times. (Most recently on 2/15 under the title "display")
There are appearantly a number of technical terms to describe the phenomenons related to text display,
but I do not know which of those is the appropriate ONE.
"screen tearing" seems to refer to something a little different.

Anyway, I noticed a connection to the degree of magnification. Maybe somebody knows something here?
Since I have sufficiently large monitors - and because of age and poor eyesight -, I set the zoom level to something like 200%.
When I set it to "optimal" on a 24" monitor, I get something over 200%.
By accident I noticed, that the "screen tearing" DOES NOT (or at least not that annoyingly) occur at a zoom level of 140% or less.
THAT seems to be the limit. Even on my high-spec machine.

But I do not like to squint at my screen for 8 hours or more a day.

Question.
IS there a trick to avoid this phenomenon, where major text portions start to "run" into each other just like wet ink on paper and thus become unreadable?

A solution would be VERY highly appreciated.
Thank you.
Thomas

#2

Hi Thomas

Thomas Blasejewicz-3 wrote

A solution would be VERY highly appreciated.

Have you tried disabling OpenGL? In my systems the recently added OpenGL
does not bring any improvement even on a high spec machine (on the contrary)

Go to Tools > Options, on the left panel LibreOffice > View and on the right
panel uncheck "Use OpenGL for all rendering (on restart)"
Close and open LibreOffice to see if any improvements are noticeable. If
there were no changes try disabling "Use anti-aliasing" and/or "Use hardware
acceleration". Change one setting at a time and try all possible
combinations.

Hope this helps.
Pedro

#3

Thank you.
I have tried to turn EACH of the items you mentioned ON/OFF before and just retried.
None of which has ANY effect.
Just to make sure, I restarted LibreOffice (not Windows) after every change.

I seem to be the only person complaining about this behavior. Does nobody encounter it?
I noticed it on SIX different computers.

#4

I just tried
Turn OFF:
Tools -> Options -> Writer -> View -> Smooth scroll

Since I was dissatisfied with the "jumpiness" of scrolling in LibreOffice, I THOUGHT "smooth scroll" will improve things -
and forgot about that settings for years now.
If I turn that thing off, the "running ink" phenomenon seems to disappear.
The jumpiness of the scrolling remains (gets worse) though.

Sorry for the commotion.
Thomas

#5

Thomas Blasejewicz-3 wrote

None of which has ANY effect.
Just to make sure, I restarted LibreOffice (not Windows) after every
change.

I seem to be the only person complaining about this behavior. Does
nobody encounter it?
I noticed it on SIX different computers.

Yes, you only need to restart LibreOffice.

Did you use the same document to test the 6 computers? I have never seen the
"major text portions
start to "run" into each other just like wet ink on paper" problem.
Can you share a link to the document (if you used the same document)?
Can you take a screenshot of the problem?
Maybe you should search Bugzilla for this problem (and report it if it
hasn't been reported yet)

#6

More long shots...

Are any of the test computers on a Uninterruptible Power Supply?
If so, run the document on that one and pull the power from the supply to the wall.
See if tearing still occurs.

Assuming the power generated by the UPS is correct, and all machines are on same local power grid, there might be a frequency anomaly.
I'm not an electrical engineer, but power can do crazy things given the right circumstances.

If you are using linux, see if modifying your SNA/UXA settings changes things. Google how to change these settings for your OS.

#7

I read the post and did not see this question.
What Windows version are you using?
What video card/drivers do you have?
What resolution is the monitor set to?

I agree with the original poster about squinting. I use a 24 inch monitor at full 1080 HD. A lot of the web sites have really, really, small print at that resolution.

I was wondering if you reduce the "zoom" to 100% and then reduce the monitor/adapter to a smaller one, will that help with the "text running together".

Maybe having the monitor at 800x600 or 1024x768 might help when using a large display. My desktop with the 24inch monitor is down for repairs so I cannot test this out. Right now I am using a 15 inch display on my laptop.

#8

Thank you.
However, on 2/21 I posted a [SOLVED] message.
The "solution" was giving up the setting "smooth scrolling" under Options -> Writer -> View.
(which I thought might help with the "jumpy" behavior of LibreOffice; it did not)
It is not perfect, but helped a lot.

* I do not have a UPS. And half of my computers are in different buildings in different parts of town ...

Thomas