Created attachment 124181 [details] Screen capture of LibreOffice slow window re-draw on Ubuntu 16.04, Unity. Unexpectedly slow window re-draw when running LibreOffice on Ubuntu Unity 16.04 or Ubuntu 14.04, 64 bit versions. (I've not tried the 32 bit versions) Loading a 3 page test document with 3 images inserted, results in very slow window re-draw, after resizing that window by dragging the top LH or RH corner of the LO window. The problem is not apparent when running other Ubuntu GUIs on the same hardware. It is exclusively a problem on Unity. I have reproduced the effect on at least six different computers, over the last two years. Please watch the attached screen capture video.
Just to add that I see much the same running under Unity on Ubuntu 14.04LTS 64-bit. Dragging the right edge, bottom edge or bottom RH corner is fine. Resizing using any other edge or corner results in noticeable repainting delays. Using LibreOffice from ppa:libreoffice/ppa Version: 5.1.2.2 Build ID: 1:5.1.2~rc2-0ubuntu1~trusty0 CPU Threads: 8; OS Version: Linux 3.19; UI Render: default; Locale: en-GB (en_GB.UTF-8) Hardware: HP EliteDesk 800 G1 Memory: 24GB CPU: Intel® Core™ i7-4770 CPU @ 3.40GHz × 8 Graphics: Intel® Haswell Desktop
Created attachment 124182 [details] sluggish redraw under Unity with Ubuntu 14.04LTS
Yep, have seen this. Could not find a duplicate report. Ubuntu 15.10 64-bit Version: 5.1.0.3 Build ID: 1:5.1.0~rc3-0ubuntu1~wily0 CPU Threads: 2; OS Version: Linux 4.2; UI Render: default; Locale: en-US (en_US.UTF-8)
Could you guys test with 5.1.3 to see, if the problem is gone? bug 99829 mentioned it is fixed.
(In reply to Philip G Francis from comment #0) > Created attachment 124181 [details] > Screen capture of LibreOffice slow window re-draw on Ubuntu 16.04, Unity. > > Unexpectedly slow window re-draw when running LibreOffice on Ubuntu Unity > 16.04 or Ubuntu 14.04, 64 bit versions. (I've not tried the 32 bit versions) > > Loading a 3 page test document with 3 images inserted, results in very slow > window re-draw, after resizing that window by dragging the top LH or RH > corner of the LO window. > > The problem is not apparent when running other Ubuntu GUIs on the same > hardware. It is exclusively a problem on Unity. > > I have reproduced the effect on at least six different computers, over the > last two years. > > Please watch the attached screen capture video. It seems to be a gtk port only issue, because the slow User Interface Update can be avoided, by the following workaround: 1. Remove of packages: libreoffice-gnome and libreoffice-gtk and libreoffice-gtk3. 2. Restart (Close and Open) of LibreOffice. After that, LibreOffice User Interface is being updated fast. But, when (main) window is resized, sometimes it becomes messy. LibreOffice 5.1.3.2 Ubuntu 16.04 64 bit
(In reply to Buovjaga from comment #4) > Could you guys test with 5.1.3 to see, if the problem is gone? bug 99829 > mentioned it is fixed. Bug still exists in LibreOffice 5.1.3.2, Ubuntu 16.04 64 bit.
Some related discussions: LibreOffice slow with large documents http://ubuntuforums.org/showthread.php?t=2322879 LibreOffice very slow on Ubuntu 16.04 http://ubuntuforums.org/showthread.php?t=2326710 Why is LibreOffice so slow when used in Ubuntu 16.04? http://askubuntu.com/questions/785417/why-is-libreoffice-so-slow-when-used-in-ubuntu-16-04/787285#787285
Issue was fixed in LibreOffice 5.1.4.2, at least for zooming large documents.
(In reply to Ioannis Ilousis-Iliadis from comment #8) > Issue was fixed in LibreOffice 5.1.4.2, at least for zooming large documents. I still get a lag when resizing window, but it doesn't seem to be as bad as before. Version: 5.1.4.2 Build ID: 1:5.1.4-0ubuntu1~xenial1 CPU Threads: 4; OS Version: Linux 4.4; UI Render: default; Locale: en-US (en_US.UTF-8)
*** Bug 101284 has been marked as a duplicate of this bug. ***
The problem is linked to gtk2 backend, it is not present with gtk3 backend. Best regards. JBF
*** Bug 103698 has been marked as a duplicate of this bug. ***
*** Bug 97964 has been marked as a duplicate of this bug. ***
Not really a perceptible difference between gtk2 and gtk3. Let's close. Version: 5.3.2.2 Build ID: 1:5.3.2~rc2-0ubuntu1~xenial0 CPU Threads: 2; OS Version: Linux 4.4; UI Render: default; VCL: gtk2; Layout Engine: new; Locale: en-US (en_US.UTF-8); Calc: group