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Bug#832495: libreoffice: Extremely slow to redraw UI.



Hi,

Please see more info below. (Also, please note that the url for the video has changed to remove the visible docs - https://www.dropbox.com/s/hleno1uht054uor/Screencast%202016-07-26%2013%3A19%3A37.mp4?dl=0 )

Also it seems a workaround is to install libreoffice-gtk3.

On 26/07/16 13:16, Rene Engelhard wrote:
tag 832495 + moreinfo
tag 832495 + unreproducible
thanks

Hi,

On Tue, Jul 26, 2016 at 09:53:07AM +0800, Andrew King wrote:
After upgrading libreoffice, ui is extremely slow to redraw, almost to the point of unusable. (Hence - important).
you are aware that the upgrade to 5.1.5 is already > 5 days old and noone complained so far? If it was a general problem and/or a problem with
the nvidia drivers probably people would already have filed a bug...
https://bugzilla.redhat.com/show_bug.cgi?id=1303562

The same issue is reported here. - and now that I have found this bug report, installing libreoffice-gtk3 also fixes this, but I'm left with the same issues as comment 6 (poor anti-aliasing, and ugly fonts).

The changelog for fedora seems to have a lot of gtk3 related changes. https://pkgs.org/fedora-24/fedora-updates-x86_64/libreoffice-5.1.5.1-1.fc24.x86_64.rpm.html#changelog
This started happening after an apt-get upgrade. Now opening Libre-office (any component) is exceptionally slow. I've uploaded a screencast of how bad is at (moved - see above link) . Previous version did not have this problem.
I don't see slowness in your video?
I can see the row numbers drawn in groups of 5 down the side. followed a second or more later by the cells themselves. It takes a total of 4 seconds to draw the UI for calc. (for comparison see https://www.dropbox.com/s/c0dyd38hryk2ryk/Screencast%202016-07-26%2013%3A39%3A47.mp4?dl=0 , which starts instantly as it did in the previous version - but has bad anti-aliasing. )

Note that it also has this slowness when editing cells, and moving desktops.
I have reset LO preferences, and tried various options for hardware acceleration, etc. No change.
Also OpenGL off?
Yes, have tried all the gl options I could find.
This is on a very high spec'd machine (16 core, 64GB ram, Nvidia Quadro K4200), I am using the binary nvidia drivers, but don't have the option to use anything else at the moment.

There's always the option of not using those. There's actually no reason to use
those, imho. Try with the free drivers, and if the problem goes away fine.
(Offtopic)

I have previously tried the noveau drivers, and (unfortunately) they're not comparable (at all) in performance. I need to visualise multi-gigabyte 3d Datasets, which results in tearing, crashes, and hangs with the noveau drivers.
Needless to say, works fine here. (Intel.)

moreinfo, unreproducible. I "hate" such type of "bugs" because there's nothing
really to do here, you use a proprietary driver not in Debian and noone really
can do something about it.

I'm not a fan either, but I don't have the choice in this case.

Regards,
Andrew


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